#' Creates a matrix of zeros.
#'
#' Function creates a matrix of zeros of size (dim1 x dim2). Written to match MATLAB's \code{zeros} function.
#'
#'
#' @param dim1 The dimension of the matrix (if square) or the number of rows.
#' @param dim2 The number of columns
#' @return A matrix of zeros.
#' @family MATLAB
#' @example tests/testthat/examples_fcn_doc/examples_zeros.R
#' @export
## Function written to match MATLAB function
## Author: Andrew Hooker
zeros <- function(dim1,dim2=NULL){
if(is.null(dim2)){
if(length(dim1)==2){
tmp <- dim1
dim1 <- tmp[1]
dim2 <- tmp[2]
} else if(length(dim1)==1){
dim2 <- dim1
} else {
stop("first argument can only have one or two values")
}
}
mat <- matrix(0,dim1,dim2)
return(mat)
}