MATLAB ignores a trisurf's FaceVertexAlphaData property

In this MWE, Matlab completely ignores my alpha settings. Am I forgetting something or is this a bug?

[x,y] = meshgrid(0:10);
DT = delaunayTriangulation([x(:) y(:)]);
xx = DT.Points(:,1);
yy = DT.Points(:,2);
surfHandle.FaceAlpha = 'flat';
surfHandle.AlphaDataMapping = 'none';
srf = trisurf(DT.ConnectivityList,xx,yy,ones(size(xx)));
srf.FaceVertexAlphaData = rand(size(srf.Faces,1),1);

Answer 1

[Walter Roberson]

https://www.mathworks.com/help/matlab/ref/matlab.graphics.primitive.patch-properties.html#buduav0-1-FaceVertexAlphaData

Note

If the FaceAlpha and EdgeAlpha properties are both set to scalar values, then the patch does not use the FaceVertexAlphaData values.

[Walter Roberson]

[x,y] = meshgrid(0:10);
DT = delaunayTriangulation([x(:) y(:)]);
xx = DT.Points(:,1);
yy = DT.Points(:,2);
srf = trisurf(DT.ConnectivityList,xx,yy,ones(size(xx)));
srf.FaceAlpha = 'flat';
srf.AlphaDataMapping = 'none';
srf.FaceVertexAlphaData = rand(size(srf.Faces,1),1);

Whatever surfHandle is, it is nothing to do with srf

[Jason]

Ahh thank you very much. The whole surfhandle thing was a copy and paste error but I see what needs to be done.