Question

I am working on Windows. I just want to input an array and get the cdf of the array.

Answer 1

First, you could implement the CDF like this:

from bisect import bisect_left

class discrete_cdf:
    def __init__(self, data):
        self._data = data # must be sorted
        self._data_len = float(len(data))

    def __call__(self, point):
        return (len(self._data[:bisect_left(self._data, point)]) /
                self._data_len)

Using the above class, you can plot it like this:

from scipy.stats import norm
import matplotlib.pyplot as plt

cdf = discrete_cdf(your_data)
xvalues = range(0, max(your_data))
yvalues = [cdf(point) for point in xvalues]
plt.plot(xvalues, yvalues)

Edit: An arange doesn’t make sense there, the cdf will always be the same for all points between x and x+1.