Map each list value to its corresponding percentile

Question

I\'d like to create a function that takes a (sorted) list as its argument and outputs a list containing each element\'s corresponding percentile.

For example,

Answer 1

This version allows also to pass exact percentiles values used to ranking:

def what_pctl_number_of(x, a, pctls=np.arange(1, 101)):
    return np.argmax(np.sign(np.append(np.percentile(x, pctls), np.inf) - a))

So it's possible to find out what's percentile number value falls for provided percentiles:

_x = np.random.randn(100, 1)
what_pctl_number_of(_x, 1.6, [25, 50, 75, 100])

Output:

3

so it hits to 75 ~ 100 range