power4mome (version 0.1.1)

rbeta_rs2: Random Variable From a Beta Distribution (User Range)

Description

Generate random numbers from a beta distribution, rescaled to have user-specified population mean and standard deviation, and within a specific range.

Usage

rbeta_rs2(n = 10, bmean, bsd, blow = 0, bhigh = 1)

Value

A vector of the generated random numbers.

Arguments

n

The number of random numbers to generate.

bmean

The population mean.

bsd

The population standard deviation. If bsd is zero or negative, all random numbers will be equal to bmean.

blow

The lower bound of the target range.

bhigh

The upper bound of the target range.

Details

First, specify the two parameters, shape1 and shape2, and the desired population mean and standard deviation. The random numbers, drawn from a beta distribution by stats::rbeta() will then be rescaled to the desired population range.

Examples

set.seed(90870962)
x <- rbeta_rs2(n = 5000,
               bmean = .80,
               bsd = .10,
               blow = .00,
               bhigh = .95)
mean(x)
sd(x)
hist(x)
y <- rbeta_rs2(n = 5000,
               bmean = 4,
               bsd = 3,
               blow = -10,
               bhigh = 10)
mean(y)
sd(y)
hist(y)