python: plotting a histogram with a function line on top

Question

I\'m trying to do a little bit of distribution plotting and fitting in Python using SciPy for stats and matplotlib for the plotting. I\'m having good luck with some things like

Answer 1

One could be interested in plotting the distibution function of any histogram. This can be done using seaborn kde function

import numpy as np # for random data
import pandas as pd  # for convinience
import matplotlib.pyplot as plt  # for graphics
import seaborn as sns  # for nicer graphics

v1 = pd.Series(np.random.normal(0,10,1000), name='v1')
v2 = pd.Series(2*v1 + np.random.normal(60,15,1000), name='v2')

# plot a kernel density estimation over a stacked barchart
plt.figure()
plt.hist([v1, v2], histtype='barstacked', normed=True);
v3 = np.concatenate((v1,v2))
sns.kdeplot(v3);
plt.show()

from a coursera course on data visualization with python