Merge branch 'dev' into 'prod'

Submitted version 0.4.0 to CRAN

See merge request !5

R/scatterMatrix.R

@@ -65,6 +65,12 @@ scatterMatrix <- function(dat, items=NULL,
                           conf.level = .95,
                           ...) {
 
+  suppressMessages(
+    if (!requireNamespace("GGally")) {
+      stop("You need the {GGally} package to use this function!");
+    }
+  );
+
   if (is.null(items)) {
     items <- names(dat);
   }