Getting information for bins in matplotlib histogram function

Question

I am plotting a histogram in python using matplotlib by:

plt.hist(nparray, bins=10, label='hist') 

Is it possible to print a dataframe that has the information for all the bins, like number of elements in every bin?

Answer 1

The return values of plt.hist are:

Returns: tuple : (n, bins, patches) or ([n0, n1, ...], bins, [patches0, patches1,...])

So all you need to do is capture the return values appropriately. For example:

import numpy as np import matplotlib.pyplot as plt  # generate some uniformly distributed data x = np.random.rand(1000)  # create the histogram (n, bins, patches) = plt.hist(x, bins=10, label='hst')  plt.show()  # inspect the counts in each bin In [4]: print n [102  87 102  83 106 100 104 110 102 104]  # and we see that the bins are approximately uniformly filled. # create a second histogram with more bins (but same input data) (n2, bins2, patches) = plt.hist(x, bins=20, label='hst')  In [34]: print n2 [54 48 39 48 51 51 37 46 49 57 50 50 52 52 59 51 58 44 58 46]  # bins are uniformly filled but obviously with fewer in each bin. 

The bins that is returned defines the edges of each bin that was used.