Fix marker size issue when plotting single points

Author: robertoffmoura

plotly/Test_plotlyfig.m

@@ -227,8 +227,29 @@ function testSingleScatterPlotData(tc)
             p = plotlyfig(fig,"visible","off");
 
             tc.verifyNumElements(p.data, 1);
-            tc.verifyEqual(p.data{1}.x, {x});
-            tc.verifyEqual(p.data{1}.y, {y});
+            tc.verifyEqual(p.data{1}, struct( ...
+                type = "scatter", ...
+                xaxis = "x1", ...
+                yaxis = "y1", ...
+                mode = "markers", ...
+                visible = true, ...
+                name = '', ...
+                x = {{x}}, ...
+                y = {{y}}, ...
+                marker = struct( ...
+                    sizeref = 1, ...
+                    sizemode = 'area', ...
+                    size = {{36}}, ...
+                    line = struct( ...
+                        width = 0.7500, ...
+                        color = "rgb(0,114,189)" ...
+                    ), ...
+                    symbol = 'circle', ...
+                    color = "rgba(0,0,0,0)", ...
+                    opacity = 1 ...
+                ), ...
+                showlegend = false ...
+            ));
         end
 
         function testScatter3DPlotData(tc)

plotly/plotlyfig_aux/helpers/extractScatterMarker.m

@@ -181,5 +181,8 @@
             dataSize = size(plotData.RData); % polar plot
         end
         markerSize = markerSize * ones(dataSize);
+        if isscalar(markerSize)
+            markerSize = {markerSize};
+        end
     end
 end