CODEWITHSUNDEEP
pythonmatplotlib
canonball
canonball

Reputation: 515

Plot multiple bars in matplotlib

def plotbars(hists, bins, labels, filename):
    plt.figure()
    center = (bins[:-1] + bins[1:]) / 2
    width = 0.7 * (bins[1] - bins[0])
    for hist in hists:
        plt.bar(center, hist, align='center', width=width)
    plt.legend(labels)
    plt.savefig(filename)

If I plot histograms like this plotbars([hist1, hist2], bins, ['hist1', 'hist2'], 'histo.png'), this plots the histograms on top of each other. I want to the bars of the histogram to be adjacent. The bin width for each are equal.

Upvotes: 0

Views: 3574

Answers (1)

error
error

Reputation: 2471

try using plt.hist instead of plt.bar.

hist1=[x for x in range(0,10)]*10
hist2= [x for x in range(0,10)]*2
plt.hist([hist1,hist2],bins = 10)

Yields this image:

enter image description here

Is this how you would like to see your graph?

Update:

x axis can be properly formatted using the following.

bin_list = [x for x in range(0,11) ]
plt.hist([hist1,hist2], bins=bin_list ,align='left')

Resulting in a proper spaced x axis. For some reason it appears bins must be set as a list for proper spacing of x values.

enter image description here

https://matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.xticks

For further tweaking you can try to play around with plt.xticks().

Upvotes: 1

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