Generate a random data with fix mean

I have a matrix with 360 elements and I need to expand it to 3600 elements with the same mean and standard deviation.

Answer 1

[Wayne King]

You don't say the size of your matrix, you just tell us the number of elements. You also do not give us any information about the distribution -- is it Gaussian?

 Xstart = randn(360,1);
 meanX = mean(Xstart);
 stdX = std(Xstart);
 Xend = [Xstart ; stdX*randn(3600-360,1)+meanX];

[Ahmed Hussein]

Thank you very much

[Image Analyst]

Of course repmat() also meets the requirements (or lack thereof).

vector3600 = repmat(vector360, [1, 10]);

Answer 2

[Ahmed Hussein]

The matrix is [1,360] and the distribution is Gaussian

Thank you very much

Answer 3

[Ahmed Hussein]

Thank you very much