Pandas styling Exercises: Write a Pandas program to highlight the maximum value in each column

Last update on May 02 2025 12:53:25 (UTC/GMT +8 hours)

3. Highlight Maximum Value in Each Column

Create a dataframe of ten rows, four columns with random values. Write a Pandas program to highlight the maximum value in each column.

Sample Solution :

Python Code :

import pandas as pd
import numpy as np
np.random.seed(24)
df = pd.DataFrame({'A': np.linspace(1, 10, 10)})
df = pd.concat([df, pd.DataFrame(np.random.randn(10, 4), columns=list('BCDE'))],
               axis=1)
df.iloc[0, 2] = np.nan
df.iloc[3, 3] = np.nan
df.iloc[4, 1] = np.nan
df.iloc[9, 4] = np.nan
print("Original array:")
print(df)
def highlight_max(s):
    '''
    highlight the maximum in a Series green.
    '''
    is_max = s == s.max()
    return ['background-color: green' if v else '' for v in is_max]

print("\nHighlight the maximum value in each column:")
df.style.apply(highlight_max,subset=pd.IndexSlice[:, ['B', 'C', 'D', 'E']])

Original array:

Original array:
      A         B         C         D         E
0   1.0  1.329212       NaN -0.316280 -0.990810
1   2.0 -1.070816 -1.438713  0.564417  0.295722
2   3.0 -1.626404  0.219565  0.678805  1.889273
3   4.0  0.961538  0.104011       NaN  0.850229
4   5.0       NaN  1.057737  0.165562  0.515018
5   6.0 -1.336936  0.562861  1.392855 -0.063328
6   7.0  0.121668  1.207603 -0.002040  1.627796
7   8.0  0.354493  1.037528 -0.385684  0.519818
8   9.0  1.686583 -1.325963  1.428984 -2.089354
9  10.0 -0.129820  0.631523 -0.586538       NaN

Highlight the maximum value in each column:

Sample Output:

Download the Jupyter Notebook from here.

For more Practice: Solve these Related Problems:

Write a Pandas program to highlight the maximum value in each column of a dataframe using a custom style function.
Write a Pandas program to apply conditional formatting to a dataframe such that the maximum in every column is displayed with a distinct color.
Write a Pandas program to create a styling function that iterates through each column and highlights its highest value with a bold border.
Write a Pandas program to dynamically highlight the maximum value in each column of a random dataframe, using gradient colors for emphasis.

Go to:

Previous: Create a dataframe of ten rows, four columns with random values. Convert some values to nan values. Write a Pandas program which will highlight the nan values.
Next: Create a dataframe of ten rows, four columns with random values. Write a Pandas program to highlight the minimum value in each column.

Python Code Editor:

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