how to only keep the rows with a groupmaximum in python

Quaint Quetzal answered on August 30, 2022 Popularity 1/10 Helpfulness 1/10

answer how to only keep the rows with a groupmaximum in python

how to only keep the rows with a groupmaximum in python

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Tip Quaint Quetzal 1 GREPCC

In [5]: df['count_max'] = df.groupby(['Mt'])['count'].transform(max)

In [6]: df
Out[6]:
    Sp  Mt Value  count  count_max
0  MM1  S1     a      3          3
1  MM1  S1     n      2          3
2  MM1  S3    cb      5          8
3  MM2  S3    mk      8          8
4  MM2  S4    bg     10         10
5  MM2  S4   dgd      1         10
6  MM4  S2    rd      2          7
7  MM4  S2    cb      2          7
8  MM4  S2   uyi      7          7

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In [5]: df['count_max'] = df.groupby(['Mt'])['count'].transform(max)

In [6]: df

Out[6]:

    Sp  Mt Value  count  count_max

0  MM1  S1     a      3          3

1  MM1  S1     n      2          3

2  MM1  S3    cb      5          8

3  MM2  S3    mk      8          8

4  MM2  S4    bg     10         10

5  MM2  S4   dgd      1         10

6  MM4  S2    rd      2          7

7  MM4  S2    cb      2          7

8  MM4  S2   uyi      7          7

Popularity 1/10 Helpfulness 1/10 Language python

Source: stackoverflow.com

Tags: python rows

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Contributed on Aug 30 2022

Quaint Quetzal

0 Answers Avg Quality 2/10

how to only keep the rows with a groupmaximum in python

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