MATLAB: How to generate multiple random samples of size 200

normal distributionrandom samples

I want to generate multiple (say 1000) random samples from the normal distribution each of size 200. How do I achieve that. Thanks!

Best Answer

rnv=randn(200,1000); % generate 1000 column samples of 200

Refer to the subsample sets as rnv(:,idx) where idx is the desired sample number. Don't even think of trying to build named variables for this.

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help rand
doc rand

MATLAB: 200 X 200 Matrix

Note that your code does not follow the guidelines given to you: the tic and toc are supposed to be before and after the sum statement, but you have put them around the randi statement.

You might end up with something like this:

R = 200;
C = 200;
X = randi([-100,100], R, C);
% sum in one statement
tic
Y = sum(X(:));
toc
% sum in a loop
Z = 0;
tic
for rr = 1:R
    for cc = 1:C
        Z = Z + X(rr,cc);
    end
end
toc

Best Answer

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MATLAB: 200 X 200 Matrix

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