#' Lower triangle of matrix
#'
#' @description Extract and vectorize lower triangular portion of square matrix
#' @usage lowerTriangle(m)
#' @param m a square matrix
#' @return v a vector containing the lower triangular
#' @examples
#' mat <- as.matrix(dist(1:10))
#' lowerTriangle(mat)
#' @export lowerTriangle
lowerTriangle <- function(m){
return(m[lower.tri(m)])
}
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