matlab.el:

(matlab-font-lock-anchor-variable-match): . is ok in arguments variable names.

tests/blocks.m:
Added sample argument block using variable name as struct with . in it.

matlab.el

@@ -976,7 +976,7 @@ color support."
 This matcher will handle a range of variable features."
   (when (member (nth 1 matlab-fl-anchor-keyword)
 		'("properties" "events" "arguments"))
-    (let* ((match (re-search-forward "\\(?:^\\|[,;]\\)\\s-+\\(\\w+\\)\\_>" ml-fl-anchor-limit t))
+    (let* ((match (re-search-forward "\\(?:^\\|[,;]\\)\\s-+\\(\\(?:\\w+\\|\\.\\)+\\)\\_>" ml-fl-anchor-limit t))
 	   ;; Save this match so we can do a 2nd anchored search for a data type.
 	   (md1 (list (match-beginning 1) (match-end 1)))
 	   (tm (looking-at

tests/blocks.m

@@ -121,6 +121,19 @@ classdef blocks < handle
             y = a+b+length(varargin);   %!!12
         
         end
+
+        function linLog(x,y,scale)
+            arguments(Repeating) %!!12
+                x (1,:) double
+                y (1,:) double
+            end %!!12
+            arguments  %!!12
+                scale.Plottype(1,1) string   %!!16
+%^               ^vn     ^vn   ^ty   ^ty
+            end  %!!12
+            
+            sprintf('%d %d %s\n', x, y, scale);
+        end
         
         
         %>>22