Issues with intersect function

Hello,

I am using intersect function with this following command :

[c, ia ib] = intersect(Signal,VIndex)
VIndex = [VIndex(ib,1),VIndex(ib,2)]

>> size(Signal)

ans =

          2514           2

>> size(VIndex)

ans =

          2517           2

The problem with this, is that i am getting this following error :

Index exceeds matrix dimensions.

the issue is that the command that my ib is giving me something like this in the first columns :

   2572
    4004
    4
    5
    6
    7
    8
    9
    10

I would expect it to start with 4 and not the first 2 rows, thats why i am getting this error.

I removed the first 2 columsn manually, and it works well. But when executed, it keeps putting these 2 numbers in the first 2 rows...

Anyone encountered this?

Thank you

D

[dpb]

Unless it's been changed, the above shouldn't even work at all; w/ R2012b for two arrays w/o the 'rows' optional argument I get

>> a=randi(4,3,2);b=randi(4,5,2);
>> [c,ia,ib]=intersect(a,b)
Error using intersect>intersectlegacy (line 173)
A and B must be vectors, or 'rows' must be specified.
Error in intersect (line 90)
  [varargout{1:nlhs}] = intersectlegacy(varargin{:}); 
>>

That you "removed the first 2 columns manually" (albeit unspecified which two I presume means the first from each of the two input arrays??) I'd expect it to function correctly.

As is, I've no idea what a current release does; doc doesn't indicate anything different. It indicates that ia, ib are vectors.

Answer 1

[suren]

Probably you have used 'intersect' as a variable prior. Because I had the same issue and I searched my way to this thread. LOL. I rectified mine. I hope it helps someone in the future. Clear variable 'intersect'