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pythonhistogramnormalization
Allure
Allure

Reputation: 379

How do I plot a histogram where the maximum y-value is one?

I have the following histogram:

enter image description here

The blue columns are the data while the red line is the theoretical line. I generated this by first plotting the histogram, and then scaling the theoretical curve (which has a maximum of 1) to the approximate value of the peak of the histogram. I want to avoid this manual scaling by making the histogram have a peak value of 1 as well. How do I do this with Python?

A previous question provides a way to get the peak value (122 in my case) but I can't figure out how to use that to scale the histogram. It seems like once I invoke the hist command it will create the current histogram, which makes sense since that's what histograms are - the columns shouldn't take fractional values. In other words I need a different approach. Any help appreciated.

Upvotes: 1

Views: 1951

Answers (1)

Torbik
Torbik

Reputation: 509

Call plt.hist again but with weights parameter that specifies scaling factors:

plt.hist(hdata, bins=40, weights=[1/y.max()]*x_len)

Upvotes: 4

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