python/histo.py at master · SCKIMOSU/python · GitHub

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import numpy as np
import matplotlib.pyplot as plt

s=np.random.uniform(6, 7, 25)
smin=s.min()
smax=s.max()
bin_width=(s.max()-s.min())/4
first_left=smin
second_left=smin+bin_width
third_left=smin+bin_width*2
fourth_left=smin+bin_width*3

bins_left=np.array([first_left, second_left, third_left,
fourth_left])
first_height=np.size(np.where( (s < second_left)
& ( s>=first_left) ))
second_height=np.size(np.where( (s < third_left)
& ( s>=second_left) ))
third_height=np.size(np.where( (s < fourth_left)
& ( s>=third_left) ))
fourth_height=np.size(np.where( (s < fifth_left)
& ( s>=fourth_left) ))


bins_height=np.array([first_height, second_height,
third_height, fourth_height])

plt.figure(1)
plt.subplot(2,1,1)
plt.bar(bins_left, bins_height, width = bin_width)
plt.grid()

plt.subplot(2,1,2)
plt.bar(bins_left, bins_height, width = bin_width-0.05)
plt.grid()


plt.figure(2)
plt.subplot(2,1,1)
plt.bar(bins_left, bins_height, width = bin_width)
plt.grid()

plt.subplot(2,1,2)
plt.hist(s, bins=4, color=‘m', alpha=0.75)
plt.grid()
plt.show()