import pandas as pd import matplotlib.pyplot as plt import seaborn as sns # set seaborn style sns.set_theme() # define DataFrame df = pd.DataFrame({'Class': [1, 2, 3, 4, 5, 6, 7, 8], 'sec_A': [20, 12, 9, 14, 18, 20, 15, 22], 'sec_B': [ 12, 5, 7, 7, 9, 9, 9, 4], 'sec_C': [11, 8, 5, 9, 12, 10, 6, 6]}) # define colors to use in chart color_map = ['yellow', 'blue', 'black'] # create area chart plt.stackplot(df.Class, df.sec_A, df.sec_B, df.sec_C, labels=['Sec A', 'Sec B', 'Sec C'], colors=color_map)