# tnorm: truncated normal distribution In okamumu/Rsrat: A Software Reliability Assessment Tool

## Description

Density, distribution function, and quantile function for truncated normal distribution.

## Usage

 ```1 2 3 4 5``` ```dtnorm(x, mean = 0, sd = 1, log = FALSE) ptnorm(q, mean = 0, sd = 1, lower.tail = TRUE, log.p = FALSE) qtnorm(p, mean = 0, sd = 1, lower.tail = TRUE, log.p = FALSE) ```

## Arguments

 `x, q` A numeric vector of quantiles. `mean` A numeric value of mean parameter for the normal distirbution. `sd` A numeric value of standard deviation for the normal distirbution. `log, log.p` A logical; if TRUE, the probability p is given as log(p). `lower.tail` A logical; if TRUE, the probability is P[X <= x], otherwise, P[X > x]. `p` A numeric vector of probabilities.

## Details

The truncated normal distribution has the cumulative distribution function F(q) = 1-(1-G(q))/(1-G(0)), where G(q) is the cumulative distribution function of normal distribution with mean and sd.

## Value

'dtnorm' gives the desity, 'ptnorm' gives the distribution, and 'qtnorm' gives the quantile function.

okamumu/Rsrat documentation built on April 2, 2018, 7:33 p.m.