#'
#' Calculate pair matrix
#'
#' Create comparison variables between all rows of
#' a data matrix
#'
#' @param dat An input data set
#'
#' @export
#'
#' @return pairMat A matrix with pairwise comparisons in rows.
#'
calcPairs <- function(dat){
m <- dim(dat)[1]; n <- dim(dat)[2]; ind <- 1:m
pairMat <- matrix(NA,nrow=m*m,ncol=n)
for(i in 1:m){
pairMat[(1:m + ((i-1)*m)),] <- t(t(dat) <= dat[i,])
}
return(pairMat)
}
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