Added base Matlab function

R/isempty.R

@@ -0,0 +1,13 @@
+#' @title Is Array Empty?
+#' @description Determine whether array is empty. An empty array, table, or timetable has at least one dimension with length 0, such as 0-by-0 or 0-by-5.
+#' @details Emulates the behavior of the `isempty` function on Matlab
+#' @param x array
+#' 
+isempty <- function(x) {
+    if (class(x) %in% c("array", "matrix")) {
+        dim_mat_x <- dim(x)
+    } else {
+        dim_mat_x <- dim(matrix(x))
+    }
+    return(any(dim_mat_x == 0) | is.null(dim_mat_x))
+}