Compare two arrays of different length

I have two arrays. Lets say A = [1 5 7 10 14 17 19 22 25 26 29], B= [2 7 12 18 23 ] I want to find out the values / positions in A which are nearest to every value of B.

P.S : The resulting array should have the same length as B. Any suggestions are welcome.

Thanks

Answer 1

[Walter Roberson]

[junk, Aidx] = min(abs(bsxfun(@minus,A.',B)));

[Joe Abraham]

awesome. can u please tell me what this code does?

[Jan]

@Joe: Simply try it by splitting into parts:

A
C1 = A.'
C2 = bsxfun(@mtimes, C1, B)
C3 = abs(C2)
[C4, C5] = min(C3)

Look in the documentation for each command:

help transpose
help bsxfun
help mtimes
help abs
help min

Or read the more exhaustive documentation by replacing "help" with "doc".

[Walter Roberson]

@minus rather than @mtimes, but yes.

Answer 2

[kate hughes]

Just to be clear this doesn't work on matrices or arrays of different size, does anyone know what does?