CODEWITHSUNDEEP
matlabmemory
user2893045
user2893045

Reputation: 59

MATLAB Out of Memory Error

Relevant code:

Hf = ((j*2*pi*f).^2 + Wo.^2)/((j*2*pi*f).^2 + 2*Wo*j*2*pi*f + Wo.^2);

It runs out of memory on the Hf = ' ' line. The only non-numerical part of this statement is the f term. Typing in the command window :

size(f)

ans = 65536 1

I'm not used to MATLAB at all, but I don't think this is something I can fix by freeing up memory before I make that statement.

Here's the memory after getting the error:

Maximum possible array: 10096 MB (1.059e+10 bytes) *

Memory available for all arrays: 10096 MB (1.059e+10 bytes) *

Memory used by MATLAB: 3716 MB (3.896e+09 bytes) Physical Memory (RAM): 8173 MB (8.570e+09 bytes)

  • Limited by System Memory (physical + swap file) available.

Here it is before (after I hit >>clear all)

Maximum possible array: 10095 MB (1.059e+10 bytes) *

Memory available for all arrays: 10095 MB (1.059e+10 bytes) *

Memory used by MATLAB: 3693 MB (3.872e+09 bytes)

Physical Memory (RAM): 8173 MB (8.570e+09 bytes)

  • Limited by System Memory (physical + swap file) available.

I tried restarting MATLAB -- No luck

Upvotes: 0

Views: 321

Answers (1)

TJ27
TJ27

Reputation: 308

The part before / is a column vector (of 65536) elements, as well as the part after that. I guess you wanted to do elementwise division - in such a case, use ./ .

This way, the backslash operator, "dividing" given vectors, creates a matrix with 65536*65536 elements, so it is not surprising that there is a problem with memory.

Upvotes: 5

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