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

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!

Answer 1

[Sean de Wolski]

A = 1.6:11;
B = 1:20;
[junk, idx] = min(bsxfun(@(x,y)abs(x-y),A.',B),[],2);
C = B(idx);

Answer 2

[Bruno Luong]

BS = sort(B);
C = interp1(BS, BS, A, 'nearest', 'extrap')

Bruno

[Santosh Kasula]

Moving C Meek's comment from Answers section to here:

C Meek says: Thanks!