# Probability Density Function

Truncated normal distribution probability density function (PDF).

A normally distributed random variable X conditional on a < X < b is called a truncated normal distribution. The probability density function (PDF) for a truncated normal random variable is

where Phi and phi denote the cumulative distribution function and density function of the normal distribution, respectively, mu is the location and sigma > 0 is the scale parameter of the distribution. a and b are the minimum and maximum support.

## Usage

var pdf = require( '@stdlib/math/base/dists/truncated-normal/pdf' );