Re: multi-dimensional logical index assignment?

[José Abílio Matos]

On Saturday, 2 May 2020 20.43.15 WEST Markus Mützel wrote:
> I think the problem here is that it is not possible to combine logical
> indexing with subscript indexing. Maybe converting both to linear indices
> could do the trick:
> 
> a = rand (2, 3, 4);
> sz_a = size (a);
> 
> src_pg = 4;
> target_pg = 2;
> a(find (a(:,:,src_pg)<0.5) + (target_pg-1)*prod (sz_a(1:2))) = 0;
> 
> 
> "find" effectively converts the logical indices to linear indices. The rest
> is an offset to index into the second page.
> 
> HTH,
> Markus

If it were in the fourth page the following would work:

idx3 = reshape(1+floor((0:numel(A)-1)/size(A,1)/size(A,2)), size(A));
A(A > 0.5 & idx3==4) = 0;

Such as it is I think that Markus' solution is the best we can do. :-)
-- 
José Matos