Grid transformations with pcolor()

[xarico10]

When using pcolor() and trying to use defined non-regular grids, an empty figure is printed.

[X,Y] = meshgrid(-3:6/17:3);
XX = 2*X.*Y;
YY = X.^2 - Y.^2;
colorscale = [1:18; 18:-1:1];
C = repmat(colorscale,9,1);
pcolor(XX,YY,C);

fig2plotly(gcf, 'offline', false);

Expected and generated (https://chart-studio.plotly.com/~xarico10/797/#/) plots:

Examples on using pcolor() can be found on:
https://www.mathworks.com/help/matlab/ref/pcolor.html#responsive_offcanvas

[gilbertogalvis]

PR #340 fix this issue

To test it please use the code

[X,Y] = meshgrid(-3:6/17:3);
XX = 2*X.*Y;
YY = X.^2 - Y.^2;
colorscale = [1:18; 18:-1:1];
C = repmat(colorscale,9,1);
pcolor(XX,YY,C);

fig2plotly(gcf, 'offline', 1, 'TreatAs', 'pcolor');

As you can see it is necessary to set 'TreatAs' Plotly Option to 'pcolor'

results looks as follow