MATLAB: Do I receive an error when I supply a sparse matrix to the FIND function in MATLAB 7.5 (R2007b)

Question

When I execute the following command:

k = 1;
I = find(sparse([1 2]), k);

I receive the following error:

 ??? Error using ==> find
 Too many input arguments.

Answer 1

This enhancement has been incorporated in MATLAB R2008a.

For previous MATLAB releases, the ability to find the first (or last) "k" elements of a sparse matrix using the FIND function is not available.

To work around this issue, you can find all elements using the one input syntax with FIND:

I = find(sparse([1 2]));

and then extract only the elements you need:

I = I(1:k);