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out of memory because of large matrixs and vectors

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jafar
jafar 2015-9-16
编辑： James Tursa 2015-9-16
I have written a code which generate large vectors and matrices.
for example a 1*100000000 dimension matrix must generated during the main code, but "out-of-memory" error occurred.
how can I fix it?
Thank you in advance
  2 个评论
James Tursa
James Tursa 2015-9-16
编辑：James Tursa 2015-9-16
A double vector of that size is 763MB. How much memory do you have? What do you get when you type the following at the command line:
memory
jafar
jafar 2015-9-16
Maximum possible array: 9936 MB (1.042e+10 bytes) *
Memory available for all arrays: 9936 MB (1.042e+10 bytes) *
Memory used by MATLAB: 1060 MB (1.111e+09 bytes)
Physical Memory (RAM): 7868 MB (8.250e+09 bytes)
  • Limited by System Memory (physical + swap file) available.

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回答（1 个）

James Tursa
James Tursa 2015-9-16
Please show the code you are using to create these vectors and matrices. Are you sure you are not inadvertently attempting to create a large matrix instead of a vector? E.g.,
V = zeros(1,N); % <-- creates a 1 x N vector
M = zeros(N); <-- creates a N x N matrix
  2 个评论
jafar
jafar 2015-9-16
its a simple view of my code:
C=reshape((B)'*A(2,:),[1,D]);
which B is 1x10477456 double
and A is a 3x4116 double
and D=4114*10477456
James Tursa
James Tursa 2015-9-16
编辑：James Tursa 2015-9-16
D is a 321 GB array. So no, you can't allocate that much memory ... hence the error. You will need to reformulate your problem and maybe try to work it in pieces.

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