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bayesm (version 3.0-2)

nmat: Convert Covariance Matrix to a Correlation Matrix

Description

nmat converts a covariance matrix (stored as a vector, col by col) to a correlation matrix (also stored as a vector).

Usage

nmat(vec)

Arguments

vec

k x k Cov matrix stored as a k*k x 1 vector (col by col)

Value

k*k x 1 vector with correlation matrix

Warning

This routine is a utility routine that does not check the input arguments for proper dimensions and type.

Details

This routine is often used with apply to convert an R x (k*k) array of covariance MCMC draws to correlations. As in corrdraws=apply(vardraws,1,nmat)

Examples

Run this code
##
set.seed(66)
X=matrix(rnorm(200,4),ncol=2)
Varmat=var(X)
nmat(as.vector(Varmat))

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