Compare two arrays of different length

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Joe Abraham
Joe Abraham 2012-12-18
回答： kate hughes 2014-10-21
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

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采纳的回答

Walter Roberson
Walter Roberson 2012-12-18
[junk, Aidx] = min(abs(bsxfun(@minus,A.',B)));
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Jan
Jan 2012-12-18
@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".

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kate hughes
kate hughes 2014-10-21
Just to be clear this doesn't work on matrices or arrays of different size, does anyone know what does?

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