Merge pull request #484 from plotly/throw-instead-of-reverting-to-gca

Reverting to gca is a silent bug; throw error instead

Author: robertoffmoura

plotly/plotlyfig.m

@@ -596,13 +596,17 @@ function validate(obj)
             end
 
             % find axes of figure
-            ax = findobj(obj.State.Figure.Handle,'Type','axes','-and',{'Tag','','-or','Tag','PlotMatrixBigAx','-or','Tag','PlotMatrixScatterAx', '-or','Tag','PlotMatrixHistAx'});
+            ax = findobj(obj.State.Figure.Handle, ...
+                {'Type','axes','-or','Type','PolarAxes'}, ...
+                '-and',{'Tag','','-or','Tag','PlotMatrixBigAx', ...
+                        '-or','Tag','PlotMatrixScatterAx', ...
+                        '-or','Tag','PlotMatrixHistAx'});
 
             if isempty(ax)
                 try
                     ax = obj.State.Figure.Handle.Children;
                 catch
-                    ax = gca;
+                    error("No axes found"); %#ok<CPROP>
                 end
             end