The ability to directly export this data is not available in MuPAD.
There is a workaround:
First create an example MuPAD file, 'run_waterman.mn'. Open MuPAD by typing 'mupad' at the MATLAB command prompt, and put the following commands in the MuPAD notebook file:
contents of "run_waterman.mn":
y := matrix(x):
Now close MuPAD and reopen it using the following command:
Now run the statements inside of MuPAD by selecting in MuPAD: Notebook -> Evaluate All...
Finally, execute the following at the MATLAB command prompt:
y = mu.getVar('y');
z = num2cell(y);
z = cellfun(@double,z,'UniformOutput',false);
points = cell2mat(z(:));
The waterman points will be in the variable "points" in the code above. The code above works by writing a temporary STL file to a temporary directory. For non-windows platforms, you will need to change the path to the temporary directory.