how to make the best use of memory when running MATLAB.?

now i have an array includes numeric its size is 7 x 7 and i do some operation on that array

clc
clear
a = input('Please, select your array: ');
b = nonzeros(a);
c = length(b);
for d =1:c
    if (d<c)
      e{d} = nchoosek(b, d);
    end
end
tt=cellfun(@(m) padarray(m,[0 max(cellfun(@(n) size(n,2), e)) - size(m,2)],'post'), e,'UniformOutput',0);
uu=cell2mat(tt([1:d-1])');
suu=size(uu)
uu(:,((suu(2))+1))=sum(uu')'

but i faced a problem during the implementation of the code this problem lies in the memory . please help me how to make the best use of memory when running MATLAB ?

[mohammad]

please help me necessary

[Joseph Cheng]

It may depend on your implementation, any more detail about your b and d variables? as a 7x7 matrix i was able to do nchoosek for the entire 7x7 (49 long array) choosing 5 for k. what are your n and k values that are failing memory? Can you give more detail on your problem as saying there is not enough memory to do something, all i can say is get more memory without seeing how you're trying to do this.

have you attempted to rethink the problem to see how to optimize or not have to do this?

[mohammad]

how to make the best use of memory when running MATLAB? this is just my issue and i have searched in matlab help department but without avail

[per isakson]

See http://undocumentedmatlab.com/?s=memory

[mohammad]

THANK YOU PER ISAKSON I'LL TRY TO UNDERSTAND

[per isakson]

I assume you already did read

• memory, Display memory information

and other topics in the documentation

[mohammad]

Error using vertcat Out of memory. Type HELP MEMORY for your options.

Error in nchoosek>combs (line 165) P = [P; [v(ones(size(Q,1),1),k) Q]]; %#ok

Error in nchoosek (line 122) c = combs(v,k);

Error in testt (line 7) e{d} = nchoosek(b, d); that is the message which appears to me each time

[per isakson]

Are you sure there is enough memory to run your script? If so you need to debug your script. See

http://www.mathworks.se/matlabcentral/answers/87710#answer_97292

and start with

    dbstop if error

Answer 1

[per isakson]

Try

    >> e = nchoosek((1:7*7)',24);

which returns

    Error using nchoosek (line 120)
    Maximum variable size allowed by the program is exceeded.

with my system: R2013a, 64bit, Win7, 8GB

[mohammad]

please, explain more