Function ismember - set operations, Other Engineering

function ismember - set operations:

The function ismember receives two vectors as input arguments, and returns a logical vector which is of similar length as the first argument, having 1 for true when the element in the first vector is also in the second, or 0 for false when not.

The order of arguments matters for this function.

>> v1

v1 =

2 3 4 5 6

>> v2

v2 =

1 3 5 7

>> ismember(v1,v2)

ans =

0 1 0 1 0

>> ismember(v2,v1)

ans =

0 1 1 0


By using the answer from the ismember function as an index into the first vector argument will return similar result as the intersect function.

>> logv = ismember(v1,v2)

logv =

0 1 0 1 0

>> v1(logv)

ans =

   3         5

>> logv = ismember(v2,v1)

logv =

0 1 1 0

>> v2(logv)

ans =

   3     5

Posted Date: 10/22/2012 7:35:05 AM | Location : United States

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