CODEWITHSUNDEEP
pythonmatplotlib
Andy
Andy

Reputation: 50540

Graph matplotlib to show total count in the histogram bins

I am attempting to show a histogram. The array below is the count for each individual bin of the histogram.

binVals = [0,5531608,6475325,1311915,223000,609638,291151,449434,1398731,2516755,3035532,2976924,2695079,1822865,1347155,304911,3562,157,5,0,0,0,0,0,0,0,0,0]

How would I go about doing this? I attempted with this code

import matplotlib.pyplot as plt
binVals = [0,5531608,6475325,1311915,223000,609638,291151,449434,1398731,2516755,3035532,2976924,2695079,1822865,1347155,304911,3562,157,5,0,0,0,0,0,0,0,0,0]
plt.hist(binVals, bins=len(binVals), color='r', alpha=0.5, label='Values')
plt.title("Demo Histogram")
plt.xlabel("Value")
plt.ylabel("Frequency")
plt.legend()
plt.show()

This returns an image similar to this Demo Histogram image

This is off though, because bins 0 and 19 through 27 have a count of zero in binVals. The zero values in the image above are not in the locations I'd expect.

I am expecting something similar to this

Expected Image

How can I modify my code to get this type of result?

As a bonus question, at the bottom of the expected graph there are nicely labeled Bins. Can this be done with matlibplot?

Upvotes: 4

Views: 2801

Answers (1)

Robbert
Robbert

Reputation: 2724

I think you're plotting the wrong thing. Matplotlib will calculate the histogram itself. It now plots that you have 14 bins with a value between 0 and 250,000, 3 with a value between 250,000 and 500,000 etc. If you calculate the histogram yourself, use a bar() plot, or let Matplotlib calculate the histogram for you.

For the tick labels, use set_xticklabels(["Under 600", "600-700",...], rotation = "vertical")

(I made the comments an answer, so it can be marked as answered)

Upvotes: 2

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