Added translated function + unit tests

R/strcmp.R

@@ -0,0 +1,28 @@
+#' @title Compare two character elements
+#' @description Logical test if two character elements are identical
+#' @param s1 first character element (string, vector or matrix)
+#' @param s2 second character element (string, vector or matrix)
+#' @return a logical element of the same type as the input
+#' @export
+strcmp <- function(s1, s2) {
+    if (length(s1) == 1 & length(s2) == 1) {
+        # Both are scalars, comparison is straightforward
+        return(identical(s1, s2))
+    } else if (length(s1) == 1 & length(s2) > 1) {
+        # s1 is a scalar and s2 is a vector or a matrix
+        checks <- sapply(s2, function(s) s1 %in% s)
+        if (is(s2, "matrix")) checks <- matrix(checks, nrow(s2))
+    } else if (length(s1) > 1 & length(s2) == 1) {
+        # s1 is a vector/matrix, s2 is a scalar
+        checks <- sapply(s1, function(s) s2 %in% s)
+        if (is(s1, "matrix")) checks <- matrix(checks, nrow(s1))
+    } else {
+        # s1 and s2 are vectors/matrices
+        if (identical(dim(s1), dim(s2))) {
+            checks <- as.matrix(s4 == s5)
+        } else {
+            stop("Inputs must be the same size or either one can be a scalar.")
+        }
+    }
+    return(checks)
+}