geopdf (Statistics Toolbox)

Geometric probability density function (pdf).

Syntax

Y = geopdf(X,P)

Description

geocdf(X,P) computes the geometric pdf with probabilities, P, at the values in X. The arguments X and P must be the same size except that a scalar argument functions as a constant matrix of the same size as the other argument.

The parameter, P, is on the interval [0 1].

The geometric pdf is:

where:

Examples

Suppose you toss a fair coin repeatedly. If the coin lands face up (heads), that is a success. What is the probability of observing exactly three tails before getting a heads?

p = geopdf(3,0.5)

p =

    0.0625

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