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I want to multiply a big matrix (possibly 6000 * 6000) with its transpose. However I get out of memory error. I know that I don't have enough RAM to make this works...but is there any way I can get this to work?? I am running Matlab R2012b on 32bit windows vista. Can someone show me how to do this block wise, or some methods. The only thing that is important for me is that I need to use the result of the matrix multiplication for another analysis.
This is a sample of what I trying to do: A = ones(6000); B = A'*A; (I need to use B to get another code running).
Please advise, Thanks
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Perhaps there are any magic tricks, which allow to compute A'*A. When you call the BLAS function through a MEX interface, A' is not calculated explicitly. Perhaps http://www.mathworks.com/matlabcentral/fileexchange/13604-calllapack-matlab-interface-of-lapack-and-blas-functions helps. But nothing can compete with real RAM: Install a 64 bit version and a bunch of GigaBytes. This will be cheaper than about 1 to 2 hours of work with a usual salary for an engineer.