Re: Excluding elements of a matrix

[Quentin Spencer]

Francesco Potorti` wrote:
> > It's unwieldy, but you can copy your matrix to a new one, remove the
> > elements you don't want to see, and then display that matrix instead:
> >
> >     B = A;
> >     B(6) = [];  #Remove 6th element from B.
> >     B
> >     
>
> Expanding on this suggestion, you can do:
>
> index=1:length(A);            # index of all elements of A
> index([6 8 9]) = [];          # remove some of them
> plot(A(index));               # access only the interesting elements
>
>   

Another option is using setdiff from octave-forge:
index = setdiff(1:length(A),[6,8,9]);

This is more concise, but probably a little computationally slower than 
Francesco's proposal.

Quentin