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Topic: find all numbers in a vector
Replies: 4   Last Post: Dec 3, 2012 10:24 PM

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Roger Stafford

Posts: 5,888
Registered: 12/7/04
Re: find all numbers in a vector
Posted: Dec 3, 2012 10:00 PM
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"Petra" wrote in message <k9jerd$h6o$1@newscl01ah.mathworks.com>...
> a=[2 3 14 15 16 17 18 33 34 35]
> b=[17 18 35 60 61 62]
> and I try to find all numbers and position in a which are in b.
> The answer should be: 6 7 8 10


"Petra" wrote in message <k9jmf4$boc$1@newscl01ah.mathworks.com>...
> you are right
- - - - - - - - - -
You shouldn't give up so quickly, Petra. The answer you gave was correct - for the positions in 'a'.

Use both returned quantities in the function 'ismember' to determine both the numbers in 'a' which are also in 'b' and their positions. Bear in mind of course that in case there is more than one like number in 'a' which is duplicated in 'b', you will get the position of the one with highest index.

Roger Stafford



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