Hướng dẫn how do you group dates into months in python? - làm thế nào để bạn nhóm ngày thành tháng trong python?
Bạn có thể sử dụng cú pháp cơ bản sau để các hàng nhóm theo tháng trong một bản dữ liệu gấu trúc: Show df.groupby(df.your_date_column.dt.month)['values_column'].sum() Công thức cụ thể này nhóm các hàng theo ngày trong your_date_column và tính tổng các giá trị cho các giá trị_column trong DataFrame.your_date_column and calculates the sum of values for the values_column in the DataFrame. Lưu ý rằng hàm dt.month () trích xuất vào tháng từ cột ngày trong gấu trúc.dt.month() function extracts the month from a date column in pandas. Ví dụ sau đây cho thấy cách sử dụng cú pháp này trong thực tế. Giả sử chúng ta có khung dữ liệu Pandas sau đây cho thấy doanh số được thực hiện bởi một số công ty vào các ngày khác nhau: import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 Liên quan: Cách tạo phạm vi ngày trong gấu trúc How to Create a Date Range in Pandas Chúng ta có thể sử dụng cú pháp sau để tính tổng doanh số được nhóm theo tháng: #calculate sum of sales grouped by month
df.groupby(df.date.dt.month)['sales'].sum()
date
1 34
2 44
3 31
Name: sales, dtype: int64 Ở đây, cách diễn giải đầu ra:
Chúng ta có thể sử dụng cú pháp tương tự để tính toán tối đa các giá trị bán hàng được nhóm theo tháng: #calculate max of sales grouped by month
df.groupby(df.date.dt.month)['sales'].max()
date
1 11
2 15
3 22
Name: sales, dtype: int64 Chúng tôi có thể sử dụng cú pháp tương tự để tính toán bất kỳ giá trị nào mà chúng tôi thích được nhóm theo giá trị tháng của cột ngày. LƯU Ý: Bạn có thể tìm thấy tài liệu đầy đủ cho hoạt động nhóm trong gấu trúc tại đây.: You can find the complete documentation for the GroupBy operation in pandas here. Tài nguyên bổ sungCác hướng dẫn sau đây giải thích cách thực hiện các hoạt động phổ biến khác trong gấu trúc: Pandas: Cách tính tổng tích lũy theo nhóm nhóm: Cách đếm các giá trị duy nhất theo nhóm gấu trúc: Cách tính tương quan theo nhóm Trong bài viết này, chúng tôi sẽ thảo luận về cách nhóm theo DataFrame trên cơ sở ngày và thời gian trong Pandas. Chúng tôi sẽ thấy cách nhóm A Timesereries DataFrame theo năm, tháng, ngày, v.v. Ngoài ra, chúng tôi cũng sẽ thấy cách các đối tượng thời gian nhóm như phút. Pandas Groupby cho phép chúng tôi chỉ định hướng dẫn nhóm cho một đối tượng. Lệnh được chỉ định này sẽ chọn một cột thông qua tham số chính của hàm Grouper cùng với các tham số Cấp và/hoặc Trục nếu được đưa ra, một mức của chỉ mục của đối tượng/cột đích.
Dưới đây là một số ví dụ mô tả cách nhóm theo DataFrame trên cơ sở ngày và thời gian sử dụng lớp cá mú Pandas. Ví dụ 1: Nhóm theo tháng Group by month Python3
import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 0import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 1import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 2import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 3import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 4import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 5import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 6import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 7import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 4import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 5#calculate sum of sales grouped by month
df.groupby(df.date.dt.month)['sales'].sum()
date
1 34
2 44
3 31
Name: sales, dtype: int64 0import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 7import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 4import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 5#calculate sum of sales grouped by month
df.groupby(df.date.dt.month)['sales'].sum()
date
1 34
2 44
3 31
Name: sales, dtype: int64 4import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 7import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 4import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 5#calculate sum of sales grouped by month
df.groupby(df.date.dt.month)['sales'].sum()
date
1 34
2 44
3 31
Name: sales, dtype: int64 8import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 7import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 4import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 5#calculate max of sales grouped by month
df.groupby(df.date.dt.month)['sales'].max()
date
1 11
2 15
3 22
Name: sales, dtype: int64 2import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 7import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 4import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 5#calculate max of sales grouped by month
df.groupby(df.date.dt.month)['sales'].max()
date
1 11
2 15
3 22
Name: sales, dtype: int64 6#calculate max of sales grouped by month
df.groupby(df.date.dt.month)['sales'].max()
date
1 11
2 15
3 22
Name: sales, dtype: int64 7import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 1#calculate max of sales grouped by month
df.groupby(df.date.dt.month)['sales'].max()
date
1 11
2 15
3 22
Name: sales, dtype: int64 9import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 1import 1import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 3import 3import 4import 5import 4import 7import 4import 9import 4pandas as pd 1import 4pandas as pd 3#calculate max of sales grouped by month
df.groupby(df.date.dt.month)['sales'].max()
date
1 11
2 15
3 22
Name: sales, dtype: int64 9import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 1pandas as pd 6import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 3pandas as pd 8import 44406044444244444444444
#calculate max of sales grouped by month
df.groupby(df.date.dt.month)['sales'].max()
date
1 11
2 15
3 22
Name: sales, dtype: int64 7
Output: Trong ví dụ trên, DataFrame được nhóm theo cột ngày. Như chúng tôi đã cung cấp freq = ’m, có nghĩa là tháng, vì vậy dữ liệu được nhóm lại một tháng cho đến ngày cuối cùng của mỗi tháng và cung cấp tổng số cột giá. Chúng tôi đã không cung cấp giá trị cho tất cả các tháng, sau đó chức năng nhóm được hiển thị dữ liệu cho tất cả các tháng và giá trị được gán 0 cho các tháng khác. Ví dụ 2: Nhóm theo ngày Group by days Python3
import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 0import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 1import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 2import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 3import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 4import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 5import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 6import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 7import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 1pandas as pd 6import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 3pandas as pd 8import 44406044444244444444444import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 4import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 5#calculate sum of sales grouped by month
df.groupby(df.date.dt.month)['sales'].sum()
date
1 34
2 44
3 31
Name: sales, dtype: int64 4import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 7import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 4import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 5#calculate sum of sales grouped by month
df.groupby(df.date.dt.month)['sales'].sum()
date
1 34
2 44
3 31
Name: sales, dtype: int64 8import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 7import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 4import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 5#calculate max of sales grouped by month
df.groupby(df.date.dt.month)['sales'].max()
date
1 11
2 15
3 22
Name: sales, dtype: int64 2import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 7import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 4import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 5#calculate max of sales grouped by month
df.groupby(df.date.dt.month)['sales'].max()
date
1 11
2 15
3 22
Name: sales, dtype: int64 6#calculate max of sales grouped by month
df.groupby(df.date.dt.month)['sales'].max()
date
1 11
2 15
3 22
Name: sales, dtype: int64 7import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 1#calculate max of sales grouped by month
df.groupby(df.date.dt.month)['sales'].max()
date
1 11
2 15
3 22
Name: sales, dtype: int64 9import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 1import 1import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 3import 3import 4import 5import 4import 7import 4import 9import 4pandas as pd 1import 4pandas as pd 3#calculate max of sales grouped by month
df.groupby(df.date.dt.month)['sales'].max()
date
1 11
2 15
3 22
Name: sales, dtype: int64 9import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 1pandas as pd 6import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 3pandas as pd 8import 4df 0import 4df 2import 4df 4import 4df 6import 4df 8df 9
#calculate max of sales grouped by month
df.groupby(df.date.dt.month)['sales'].max()
date
1 11
2 15
3 22
Name: sales, dtype: int64 7
Trong ví dụ trên, DataFrame được nhóm theo cột ngày. Như chúng tôi đã cung cấp freq = ’m, có nghĩa là tháng, vì vậy dữ liệu được nhóm lại một tháng cho đến ngày cuối cùng của mỗi tháng và cung cấp tổng số cột giá. Chúng tôi đã không cung cấp giá trị cho tất cả các tháng, sau đó chức năng nhóm được hiển thị dữ liệu cho tất cả các tháng và giá trị được gán 0 cho các tháng khác.
import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 68import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 69= import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 71pd.DataFrame( 5pd.DataFrame( 6pd.DataFrame( 7Output: Trong ví dụ trên, DataFrame được nhóm theo cột ngày. Như chúng tôi đã cung cấp freq = ‘5d, có nghĩa là năm ngày, vì vậy dữ liệu được nhóm theo khoảng 5 ngày mỗi tháng cho đến ngày cuối cùng được đưa ra trong cột ngày. Ví dụ 3: Nhóm theo năm Group by year Python3
import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 0import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 1import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 2import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 3import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 4import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 5import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 87import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 7import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 4import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 5import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 91import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 7import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 4import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 5import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 95import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 7import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 4import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 5import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 99import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 7import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 4import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 5#calculate sum of sales grouped by month
df.groupby(df.date.dt.month)['sales'].sum()
date
1 34
2 44
3 31
Name: sales, dtype: int64 03import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 7import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 4import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 5#calculate sum of sales grouped by month
df.groupby(df.date.dt.month)['sales'].sum()
date
1 34
2 44
3 31
Name: sales, dtype: int64 07#calculate max of sales grouped by month
df.groupby(df.date.dt.month)['sales'].max()
date
1 11
2 15
3 22
Name: sales, dtype: int64 7import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 1#calculate max of sales grouped by month
df.groupby(df.date.dt.month)['sales'].max()
date
1 11
2 15
3 22
Name: sales, dtype: int64 9import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 1import 1import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 3import 3import 4import 5import 4import 7import 4import 9import 4pandas as pd 1import 4pandas as pd 3#calculate max of sales grouped by month
df.groupby(df.date.dt.month)['sales'].max()
date
1 11
2 15
3 22
Name: sales, dtype: int64 9import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 1pandas as pd 6import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 3pandas as pd 8import 4df 0import 4df 2import 4df 4import 4df 6import 4df 8df 9
#calculate max of sales grouped by month
df.groupby(df.date.dt.month)['sales'].max()
date
1 11
2 15
3 22
Name: sales, dtype: int64 7
#calculate sum of sales grouped by month
df.groupby(df.date.dt.month)['sales'].sum()
date
1 34
2 44
3 31
Name: sales, dtype: int64 48= #calculate sum of sales grouped by month
df.groupby(df.date.dt.month)['sales'].sum()
date
1 34
2 44
3 31
Name: sales, dtype: int64 50pd.DataFrame( 5pd.DataFrame( 6pd.DataFrame( 7Output: Trong ví dụ trên, DataFrame được nhóm theo cột ngày. Như chúng tôi đã cung cấp freq = ‘2y, có nghĩa là 2 năm, vì vậy dữ liệu được nhóm lại trong khoảng 2 năm. Ví dụ 4: Nhóm theo phút Group by minutes Python3
import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 4import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 5#calculate sum of sales grouped by month
df.groupby(df.date.dt.month)['sales'].sum()
date
1 34
2 44
3 31
Name: sales, dtype: int64 03import pandas as pd
#create DataFrame
df = pd.DataFrame({'date': pd.date_range(start='1/1/2020', freq='W', periods=10),
'sales': [6, 8, 9, 11, 13, 8, 8, 15, 22, 9],
'returns': [0, 3, 2, 2, 1, 3, 2, 4, 1, 5]})
#view DataFrame
print(df)
date sales returns
0 2020-01-05 6 0
1 2020-01-12 8 3
2 2020-01-19 9 2
3 2020-01-26 11 2
4 2020-02-02 13 1
5 2020-02-09 8 3
6 2020-02-16 8 2
7 2020-02-23 15 4
8 2020-03-01 22 1
9 2020-03-08 9 5 7Trong ví dụ trên, DataFrame được nhóm theo cột ngày. Như chúng tôi đã cung cấp freq = ‘2y, có nghĩa là 2 năm, vì vậy dữ liệu được nhóm lại trong khoảng 2 năm.
#calculate sum of sales grouped by month
df.groupby(df.date.dt.month)['sales'].sum()
date
1 34
2 44
3 31
Name: sales, dtype: int64 48= #calculate max of sales grouped by month
df.groupby(df.date.dt.month)['sales'].max()
date
1 11
2 15
3 22
Name: sales, dtype: int64 23pd.DataFrame( 5pd.DataFrame( 6pd.DataFrame( 7Output: Ví dụ 4: Nhóm theo phút Làm thế nào để tôi chuyển đổi ngày thành tháng trong gấu trúc?Giả sử chúng ta chỉ muốn truy cập vào tháng, ngày hoặc năm kể từ ngày, chúng ta thường sử dụng gấu trúc ... Phương pháp 1: Sử dụng DatetimeIndex. Thuộc tính tháng để tìm tháng và sử dụng DateTimeIndex. .... Mã số :. Output:. Phương pháp 2: Sử dụng DateTime. Thuộc tính tháng để tìm tháng và sử dụng DateTime. .... Output:. Làm thế nào để bạn kết hợp ngày trong Python?Python kết hợp ngày và thời gian.. d = ngày (2016, 4, 29) .... t = dateTime.time (15, 30) .... dt = datetime.combine (d, t) .... dt2 = datetime.combine (d, t) .... DT3 = DateTime (năm = 2020, tháng = 6, ngày = 24). DT4 = DateTime (2020, 6, 24, 18, 30). dt5 = dateTime (năm = 2020, tháng = 6, ngày = 24, giờ = 15, phút = 30) .... dt6 = dt5.replace (năm = 2017, tháng = 10). Làm cách nào để thêm tháng vào gấu trúc?Trong gấu trúc, một chuỗi được chuyển đổi thành đối tượng DateTime bằng PD.Phương thức TO_DATETIME () và phương thức pd.DateOfset () được sử dụng để thêm tháng vào đối tượng gấu trúc đã tạo.pd. DateOffset() method is used to add months to the created pandas object.
Làm thế nào để tôi sắp xếp theo tháng trong gấu trúc?Conclusion:.. Sắp xếp theo tháng bằng cách tạo một từ điển của các giá trị tháng và nó là các giá trị số nguyên tương ứng .. Sắp xếp bằng cách sử dụng sort_values () bằng cách chuyển đổi cột tháng sang DateTime và truy cập giá trị số nguyên của tháng bằng DT accessor .. Sắp xếp các giá trị bằng cách chuyển đổi tháng sang phân loại và xác định tháng của một năm là danh mục .. |