Pandas, Seaborn, Plot boxplot with 2 columns and a 3º as hue

Question

in a Pandas Df with 3 variables i want to plot 2 columns in 2 different boxes and the 3rd column as hue with seaborn

I can reach the first step with pd.melt but I cant insert the hue and make it work

This is what I have:

df=pd.DataFrame({'A':['a','a','b','a','b'],'B':[1,3,5,4,7],'C':[2,3,4,1,3]})
df2=df[['B','C']].copy()
sb.boxplot(data=pd.melt(df2), x="variable", y="value",palette= 'Blues')

I want to do this in the first DF, setting variable ‘A’ as hue
Can you help me?

Thank you

Asked By: SERGIO

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Source

Answer 1

IIUC, you can achieve this as follows:

Apply df.melt, using column A for id_vars, and ['B','C'] for value_vars.
Next, inside sns.boxplot, feed the melted df to the data parameter, and add hue='A'.

import pandas as pd
import seaborn as sns
import matplotlib.pyplot as plt

df = pd.DataFrame({'A':['a','a','b','a','b'], 'B':[1,3,5,4,7], 'C':[2,3,4,1,3]})

sns.boxplot(data=df.melt(id_vars='A', value_vars=['B','C']), 
            x='variable', y='value', hue='A', palette='Blues')

plt.show()

Result

Answered By: ouroboros1

Pandas, Seaborn, Plot boxplot with 2 columns and a 3º as hue

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