matplotlib histogram in python

Question

I have load a time series dataset in pandas(date/time and kwh) and I would like to build a histogram.I'm confused with the syntax.I used this(plt.hist(data.kwh)) but the result wasn't good.

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– ByteHamster, Commented Mar 26, 2015 at 15:34

Tristan Maxson · Accepted Answer · 2015-03-26 15:42:12Z

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Ideally when you build your histogram you should also use the "bins" parameter to make enough bins to hold your data.

import matplotlib.pyplot as plt
from math import ceil

# Load data as data.kwh

spacing = 10 # size on x axis of the bin to aim for
bins = ceil((data.kwh.max() - data.kwh.min()) / spacing)

plt.hist(data.kwh, bins=bins)
plt.show()

answered Mar 26, 2015 at 15:42

Tristan Maxson

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lmiguelvargasf · Accepted Answer · 2015-03-26 15:45:03Z

1

matplotlib.pyplot.hist(samples, bins = 101)

where samples is an array and bins is the number of bins you want in your histogram.

Alternatively, you can use pylab to performm this task:

pylab.hist(samples, bins = 101)

answered Mar 26, 2015 at 15:45

lmiguelvargasf

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