Just for curiosity I would like to know how to do this in the code below. I have been searching for an answer but is useless. import numpy as np import matplotlib.pyplot as plt data=np.random.exponential(scale=180, size=10000) print ('el valor medio de la distribucion exponencial es: ') print np.average(data) plt.hist(data,bins=len(data)**0.5,normed=True, cumulative=True, facecolor='red', label='datos tamano paqutes acumulativa', alpha=0.5) plt.legend() plt.xlabel('algo') plt.ylabel('algo') plt.grid() plt.show() Continue reading...