MATLAB: Waitbar in a spmd block in a GUI

Question

Is there a way to monitor the progress of a calculation inside a spmd block? In the example below I would use a waitbar inside the outermost loop, but they are not allowed in spmd blocks. Any idea on what I could do?

Thanks a lot for your input.

Here is a very simplified version of the code.

   spmd
                % This is the place where I would initialize a waitbar normally.
                for i = 1:A
                    for k =2:B
                      %Do stuff
                    end
                 % This is the place where I would put the waitbar.eg. waitbar(i/...)
                end
    end

Answer 1

In R2013b, there's the new function PARFEVAL which lets you program the pool workers asynchronously - one of the things this allows is to update graphics such as a progress bar.

You can't use PARFEVAL with the communicating features of SPMD such as labSend and labReceive.

There's an example here using PARFEVAL to use pool workers and display a waitbar.