How to calculate upper and lower values of bins of equal density histogram?

Question

I have a range of positive integers ranging from 250-1200, with a normal distribution. I have found the answer to creating bins of equal density (Matplotlib: How to make a histogram with bins of equal area?). What I am actually looking for is to be able to retrieve the upper and lower boundaries of each bin. Is there a library/function that exists for this? or can this information be pulled out from matplotlib?

blunova · Accepted Answer · 2022-06-16T16:23:28.217

2

Let's take a look at the code provided in the question you linked:

def histedges_equalN(x, nbin):
    npt = len(x)
    return np.interp(np.linspace(0, npt, nbin + 1),
                     np.arange(npt),
                     np.sort(x))

x = np.random.randn(1000)
n, bins, patches = plt.hist(x, histedges_equalN(x, 10))

bins is actually giving you the edges of each bin as you can read in the docs of hist function:

edited Jun 16 '22 at 16:23

answered Jun 16 '22 at 14:44

blunova

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that you for your rapid answer. – thejahcoop Jun 16 '22 at 14:45
1

I have also added an example. – blunova Jun 16 '22 at 14:47
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not sure if this is giving me what I need. I am looking to generate bins that have an equal areas of density. I believe this still shows an equal-bin width histogram. I possibly need to play around with the statistic variable. – thejahcoop Jun 16 '22 at 16:04
1

sorry! I have edited my answer! Hope it helps! – blunova Jun 16 '22 at 16:20
1

fantastic. way simpler than I expected. I am truly grateful. – thejahcoop Jun 16 '22 at 16:22
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I have also added the link to the matplotlib `hist` function, look at `bins`. – blunova Jun 16 '22 at 16:24

How to calculate upper and lower values of bins of equal density histogram?

1 Answers1