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finding the common numbers in 2 arrays

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Jonathan Bird
Jonathan Bird 2018-2-19
评论： Jonathan Bird 2018-2-19
I want to compare two arrays each containing 6 numbers e.g. [1,2,3,4,5,6] and [4,8,6,10,11,12]. I want to determine how many numbers are common to both arrays (not necessarily in the same location) so the above would yield an answer of 2 as 4 and 6 are common to both. Thanks!

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Jan
Jan 2018-2-19
See:
doc ismember
With code:
a = [1,2,3,4,5,6]
b = [4,8,6,10,11,12]
nCommon = sum(ismember(a, b))
Maybe the inputs are not unique, then apply unique() at first.

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