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From: Steven_Lord on 4 Aug 2010 15:08


"Sofia Häggberg" <hd.int.assNOSPAM(a)gmail.com> wrote in message
news:i3c78o$igm$1(a)fred.mathworks.com...
> since I get:
> ??? Out of memory. Type HELP MEMORY for your options.
>
> any help...?

As others have said, this matrix is going to require a LARGE contiguous
block of memory.

numElements = 100000*3000;
numBytes = numElements*8;
numGB = numBytes/(1024^3)

In order to create this matrix you need a contiguous block of over 2 GB
worth of memory. Doing anything _with_ this matrix may require another
block the same size, depending on what you're trying to do with it.

Whether or not there's an alternative depends on what, SPECIFICALLY, you're
trying to do with it. For example, storing this as a sparse matrix (HELP
SPARSE) may help as long as whatever function you're trying to use on it
supports sparse matrices.

--
Steve Lord
slord(a)mathworks.com
comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ
To contact Technical Support use the Contact Us link on
http://www.mathworks.com

From: Stan Bischof on 4 Aug 2010 16:24
"Sofia Hagberg" <hd.int.assNOSPAM(a)gmail.com> wrote:
> since I get:
> ??? Out of memory. Type HELP MEMORY for your options.
>
> any help...?


zeros(100000, 3000); it is completely possible. Just did
it using R2010A. Howevr it takes the Matlab process size
to 3.5GB since that is a large block of data.

That means that unless you are running 64-bit code on
a 64-bit OS you are going to not be able to proceed.

I'd bet you are on 32-bits in which case the error message
you are seeing is exactly correct- "out of memory"

Stan

PS - zeros(100000, 30000); also works- but of course
it takes scads of RAM
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