# createSigma: createSigma: convenience function for mvrnorm

## Description

This function is made to quickly generate a Sigma matrix of the type required by `mvrnorm`

. By specifying the number of variables, the mean correlation, and how much variation there should be in the correlations, it's easy to quickly generate a correlation matrix.

## Usage

createSigma(nVar, meanR = 0.3, sdR = 0, diagonal = 1)

## Arguments

nVar

The number of variables in the correlation matrix.

meanR

The average correlation, provided to `rnorm`

together with `sdR`

to generate the correlations.

sdR

The variation in the correlations, provided to `rnorm`

together with `meanR`

to generate the correlations.

diagonal

The value on the diagonal of the returned matrix: will normally be 1.

## Value

A matrix of nVar x nVar.

## Examples

# NOT RUN {
createSigma(3, .5, .1);
# }