RMS error of matrices
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Hi,
I have 2 large matrixes (2048x2048), and have taken one away from the other to get a 'difference' matrix. I want to quantify this matrix by using an RMS error, however if I use a standard RMS error formula I get another 2048x2048 matrix.
Is there a way to get a single representative RMS value out?
Thanks,
Richard
댓글 수: 1
Todd Pierce
2022년 5월 11일
Hi there,
I am in a simlar position to yourself however, i want to maintain the matrix with all the rms values in, what initial line did you type in to get the rms for every value in the matrix whilst maintaining the shape.
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darksideofthemoon101
2011년 4월 6일
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Walter Roberson
2011년 4월 6일
When A and B are arrays then A-B is an array, and (A-B)^2 is
(A-B)*(A-B) which is a matrix multiplication which will produce an output the same size as A (in this case.) sqrt() of that would then be the same size.
Nothing in your code calculates the _mean_ portion of "RMS". Root MEAN square.
Possibly I should have suggested
sqrt(mean((A(:)-B(:)).^2))
but I am too tired to look up the definition at the moment.
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