Fix general axis labels

Author: robertoffmoura

plotly/Test_plotlyfig.m

@@ -2131,13 +2131,17 @@ function testAxisLabelSizeFont(tc)
 
             p = plotlyfig(fig,"visible","off");
 
-            tc.verifyEqual(p.layout.xaxis1.title, 'X Label');
+            tc.verifyEqual(p.layout.xaxis1.title, struct( ...
+                text = "X Label" ...
+            ));
             tc.verifyEqual(p.layout.xaxis1.titlefont, struct( ...
                 color = "rgb(0,0,255)", ...
                 size = 20, ...
                 family = "Droid Sans, sans-serif" ...
             ));
-            tc.verifyEqual(p.layout.yaxis1.title, 'Y Label');
+            tc.verifyEqual(p.layout.yaxis1.title, struct( ...
+                text = "Y Label" ...
+            ));
             tc.verifyEqual(p.layout.yaxis1.titlefont, struct( ...
                 color = "rgb(255,0,0)", ...
                 size = 20, ...

plotly/plotlyfig_aux/helpers/extractAxisData.m

@@ -161,7 +161,9 @@
     label.FontUnits = "points";
 
     if ~isempty(labelData.String)
-        axis.title = parseString(labelData.String,labelData.Interpreter);
+        axis.title = struct( ...
+            "text", parseString(labelData.String,labelData.Interpreter) ...
+        );
     end
 
     axis.titlefont.color = getStringColor(round(255*labelData.Color));

plotly/plotlyfig_aux/helpers/parseString.m

@@ -29,7 +29,7 @@
     formatStr = inputStr;
 
     if isempty(inputStr)
-        formatStr = 'untitled';
+        formatStr = "untitled";
         return
     end
 
@@ -229,4 +229,5 @@
             end
         end
     end
+    formatStr = string(formatStr);
 end