How can I plot a histogram such that the heights of the bars sum to 1 in matplotlib?

In plt.hist() method, stacked=True could help to get the heights of the bars sum to 1.

Steps

• Create a list of numbers.

• Using plt.hist(), we can draw the histogram.

• stacked : bool, default: False

  If "True", multiple data are stacked on top of each other If ``False`` multiple data are arranged side by side if histtype is 'bar' or on top of each other if histtype is 'step'.

• density : bool, default: False

  If "True", draw and return a probability density: each bin will display the bin's raw count divided by the total number of counts *and the bin width*.

• To show the figure, use the plt.show() method.

Example

from matplotlib import pyplot as plt

x = [1, 4, 16, 64, 256]

# stacked and density are true then the sum of the histograms is normalized to 1.
plt.hist(x, 10, stacked=True, density=True)
plt.show()

Output