ismember for string matrix

I have two string matrices;
A=['c1' 'c ' 'b ' 'd9']'; %UNIQUELIST
B=['d9' 'c1']'; %ORIGINALLIST
I would like do find member of B in A, using:
[LIA,LOCB]=ismember(A,B);
and it returns
LOCB =
3
4
3
0
0
0
1
2
But I actually would like it to return matching row index like this:
LOCB =
2
0
0
1
Thanks for your help
Sam

Antworten (2)

Sean de Wolski
Sean de Wolski am 26 Nov. 2014

0 Stimmen

You need to make A and B cell arrays so that each string piece is a separate element (rather than a 1xn string. The fix is simple use {} instead of []
A={'c1' 'c ' 'b ' 'd9'}';
B={'d9' 'c1'}'
[LIA,LOCB]=ismember(A,B)

1 Kommentar

Sam
Sam am 26 Nov. 2014
that hit the nail on the head, thanks!

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dpb
dpb am 26 Nov. 2014

0 Stimmen

You've got string arrays here; use the 'rows' optional argument to treat them as such instead of as individual characters...
>> [~,loc]=ismember(A,B,'rows')
loc =
2
0
0
1
>>

3 Kommentare

Sam
Sam am 26 Nov. 2014
i guessed if i use
[~,loc]=ismember(cellstr(A),cellstr(B))
then it would safely do the same job?
dpb
dpb am 26 Nov. 2014
Did you try it and see???
Sean de Wolski
Sean de Wolski am 26 Nov. 2014
Probably, but converting to cells is heavier weight if you don't need them for other things.

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Sam
am 26 Nov. 2014

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am 26 Nov. 2014

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