[18335fall09] pset 1 tip: disabling multiprocessing in Matlab for problem 3

[Steven G. Johnson]

One of you just pointed out to me that the latest version of Matlab  
may no longer support this feature. The web page for Matlab 7.8  
(R2009a) states:

	The capability to adjust the number of computational threads in a  
single MATLAB session is no longer available as of this release. This  
change removes from the MATLAB preferences panel the ability to set  
the maximum number of computational threads. The primary reason for  
this change is that products that MATLAB is dependent upon have the  
ability to spawn threads from the currently-executing thread. This  
makes it infeasible to monitor and/or limit the number of  
computational threads at any given time in a MATLAB process. MATLAB  
versions 7.8 and later require that you decide between threading and  
no threading at the time you launch your MATLAB session.  
Multithreading is enabled by default. To disable this feature, start  
MATLAB using the new singleCompThread option.

On Unix systems with Matlab 7.8, you might have to run matlab with  
'matlab -singleCompThread' if I understand this documentation  
correctly.  On Windows you have to right-click the Matlab icon, get  
the Properties window, and add "-singleCompThread" in the Target  
field.  See:
	http://www.mathworks.com/access/helpdesk/help/techdoc/matlab_env/f8-4994.html

SGJ
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