stackedbarplot.py

import pandas as pd
import matplotlib.pyplot as plt
import numpy as np

# test.csv:
# ,b,c,d
# p,1,2,3
# q,4,5,6
# r,7,8,9

df = pd.read_csv('test.csv', index_col=0)

N = df.shape[1]
fig = plt.figure(figsize=(16,10))
ind = np.arange(N)
layers = []
for i in range(df.shape[0]):
    if i == 0:
        layers.append(plt.bar(ind, df.iloc[i,:]))
    else:
        layers.append(plt.bar(ind, df.iloc[i,:], bottom=df.iloc[i-1,:]))

plt.legend(layers, list(df.columns))
plt.xticks(ind, list(df.index))

fig.savefig('stackedbar.png')