My parallel computing code (R2013b) is very slow

Hi! I am trying to use parallel computing and parfor loops with my R2013b MatLab version. I can already use parfor cycles but they are slow, a bit slower that the corresponding for cycle. Why is that? When I write parpool in the command window, I get: undefined function or variable 'parpool' Thank you for your help, Sebastiano.

Answer 1

[Shashank Prasanna]

If you have Parallel Computing Toolbox installed you shouldn't see the error message. Confirm you have Parallel Computing Toolbox installed by typing the following on the command line:

>> ver

If you are using an earlier of MATLAB, replace parpool with matlabpool

Take a look at the release notes for 13b:

http://www.mathworks.com/help/distcomp/release-notes.html#bt0lecr-1

Answer 2

[Sebastiano delre]

Thank you!