#'
#' @title Computes sums and means of rows or columns of numeric arrays
#' @description The function is similar to R base functions 'rowSums', 'colSums',
#' 'rowMeans' and 'colMeans'.
#' @details the output is returned to the user only the number of entries in the
#' output vector is greater or equal to the allowed size.
#' @param dataset an array of two or more dimensions.
#' @param operation an integer that indicates the operation to carry out:
#' 1 for 'rowSums', 2 for 'colSums', 3 for 'rowMeans' or 4 for 'colMeans'
#' @return a numeric vector
#' @export
#' @author Gaye, A.
#'
rowColCalcDS <- function (dataset, operation) {
if(operation == 1){
result <- rowSums(dataset, na.rm=TRUE)
}
if(operation == 2){
result <- colSums(dataset, na.rm=TRUE)
}
if(operation == 3){
result <- rowMeans(dataset, na.rm=TRUE)
}
if(operation == 4){
result <- colMeans(dataset, na.rm=TRUE)
}
# check if the output is valid (i.e. meets DataSHIELD criteria)
check <- isValidDS(result)
if(check){
return(result)
}else{
resultNA <- rep(NA, length(result))
return(resultNA)
}
return(result)
}
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