| import matplotlib.pyplot as plt |
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| months = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'] |
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| city_A = [42, 35, 48, 51, 55, 62, 68, 70, 63, 58, 47, 40] |
| city_B = [38, 31, 44, 48, 52, 60, 66, 68, 60, 55, 45, 36] |
| city_C = [46, 39, 52, 56, 60, 68, 74, 76, 70, 64, 53, 44] |
| city_D = [40, 33, 46, 49, 53, 61, 66, 68, 62, 56, 45, 38] |
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| plt.figure(figsize=(10,7)) |
| plt.stackplot(months, city_A, city_B, city_C, city_D, labels=['City A','City B','City C','City D']) |
| plt.legend(loc='upper left') |
| plt.title('City Pollution Levels Over a Year') |
| plt.xlabel('Months') |
| plt.ylabel('Pollution Index') |
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| plt.tight_layout() |
| plt.savefig("figure.png") |
