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Extracting entries from vector B that are best estimate each entry in vector A

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C Meek
C Meek 2011-1-25
关闭： MATLAB Answer Bot 2021-8-20
Hi there.
I have two vectors, A & B.
A is of length 10, while B will always be of longer length (let's say 20 for this case).
I would like to extract the entries from B that best estimate each entry in A. Therefore, I want to finish up with B being of length 10.
Any help would be much appreciated!

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回答（2 个）

Sean de Wolski
Sean de Wolski 2011-1-25
A = 1.6:11;
B = 1:20;
[junk, idx] = min(bsxfun(@(x,y)abs(x-y),A.',B),[],2);
C = B(idx);
Bruno Luong
Bruno Luong 2011-1-25
BS = sort(B);
C = interp1(BS, BS, A, 'nearest', 'extrap')
Bruno

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