Is there a method to plot contours on triangle mesh? (Bug report on existing implementations)

I am looking for a tool to produce contour plots on a triangle mesh in MATLAB. I have found two implementations for this so far, the tricontf and the contours on triangular grids .

Both suffer from the same bug though. That is the contour handle that is returned by these methods is not compatible with the input of the clabel-label method. At least that is the case with MATLAB 2015b, which I am using. This generates a 'Not enough contour handles' - error when clabel is called.

Unfortunately I cannot access the method which creates the contour handle. Does anyone know a work-around this? Or can someone suggest a different implementation?

Thanks!

[John D'Errico]

Contact the authors of those codes to make a "bug report". Anyway, this is not a bug you are reporting, just that MATLAB has changed since they were written. And Answers is not where you report bugs anyway!