Generate a random data with fix mean
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I have a matrix with 360 elements and I need to expand it to 3600 elements with the same mean and standard deviation.
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Wayne King
2014-1-7
编辑：Wayne King
2014-1-7
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];
2 个评论
Ahmed Hussein
2014-1-7
Image Analyst
2014-1-7
Of course repmat() also meets the requirements (or lack thereof).
vector3600 = repmat(vector360, [1, 10]);
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