Out of Memory Error

Hi,

I need help as I am doing my thesis and MATLAB gives me an "out of memory" error if I creates a huge matrix. In fact, I need this matrix and it can't be reduced. The matrix size is 73728x81234. This matrix is created by a for loop. The code is as follow: for ... for ... for ... for ... x = ... end end end end

That matrix will then be combined with other matrix to become 74088x81234 matrix. I have another matrix (414x81234) that will be used with the matrix above to solve the problem.

I am using laptop to solve the problem (PVRP). I have an i5 CPU and 16GB physical memory (RAM). Maximum possible array = 30314MB Memory available for all arrays = 30314MB Memory used by MATLAB = 831MB Physical Memory (RAM) = 16076MB I have tried clear and clc but it's still not enough. Please help.

Answer 1

[Friedrich]

Hi,

there isn't much you can do. The matrix you need to create needs ~45GB of Memory:

>> 74088*81234*8/1024^3

ans =

     44.8411

In the case your Matrix has a lot of 0 entries consider using a sparse matrix.

Even Parallel Computing Toolbox and the distributed array concept won't help because you don't have that much memory available:

http://www.mathworks.com/help/distcomp/distributed.distributed.html

You could increase your swap space, however your application will get extremly slow.

[Brillian]

Thanks for the reply. Cheers