Revision 59ff873ea3ba72971eea37468630c07afdf517a2 authored by Matthias Templ on 11 January 2011, 09:31:03 UTC, committed by cran-robot on 11 January 2011, 09:31:03 UTC
1 parent 128cc5e
robVariation.R
`robVariation` <-
function(x, robust=TRUE){
rvars <- matrix(0, ncol=ncol(x), nrow=ncol(x))
if(robust){
for( i in 1:ncol(x)){
for( j in 1:ncol(x)){
if( i < j ) rvars[i,j] <- (mad(log(x[,i]/x[,j])))^2
}
}
} else{
for( i in 1:ncol(x)){
for( j in 1:ncol(x)){
if( i < j ) rvars[i,j] <- (var(log(x[,i]/x[,j])))
}
}
}
invisible(rvars)
}
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