Spacing between bars in matplotlib hist() with thousands of bins

问题

I'm making histograms using matplotlib's hist() function or bar(), and I want to use >10,000 bins (one bin to represent the counts at each coordinate of a large entity). Is there any way to create more whitespace between the vertical bars when I create the figure? Currently, there is no whitespace between each bar of the histogram. For example:

# imports
import matplotlib
matplotlib.use('Agg')
import matplotlib.pyplot as plt
import numpy as np
import random

# Generating dummy data    
coordinate_counts = []
for __ in range(1,100000) :
    coordinate_counts.append(random.randrange(1,10000))

# plotting
fig, ax1 = plt.subplots()
ax1.hist(coordinate_counts,bins=range(1,10000))
fig.savefig('temp.png')

I've tried using rwidth() and varying the value of that, as well as tried using figsize() and simply expanding the size of the plot, but the final result always has each vertical bar next to eachother with no whitespace inbetween.

回答1:

The parameter rwidth specifies the width of your bar relative to the width of your bin. For example, if your bin width is say 1 and rwidth=0.5, the bar width will be 0.5. On both side of the bar you will have a space of 0.25.

Mind: this gives a space of 0.5 between consecutive bars. With the number of bins you have, you won't see these spaces. But with fewer bins they do show up.

来源：https://stackoverflow.com/questions/25394913/spacing-between-bars-in-matplotlib-hist-with-thousands-of-bins