> OK, thanks for this info. I wonder whether e.g. view(A, :, > 2:size(A,2))[end-10:end] will create a copy of the data or only a > reference.
That depends on the implementation of getindex for ArrayView which could do either. Easy to check though: typeof(view(A, :, 2:size(A,2))[end-10:end]) BTW, I think it's planned to make [] return a view by default sometime in the future. M > In Julia v0.3 bracket expressions like A[:,2:end] will actually > create a copy what imposes quite an overhead if A is large. > > Jan > > Dňa streda, 24. septembra 2014 12:21:26 UTC+2 Mauro napísal(-a): >> >> Yes, I think this is a limitation of Julia. `end` is really just >> syntactic sugar: expressions like `A[1,end]` will be replaced by >> `A[1,size(A,2)]` before being further parsed. (at least that is my >> understanding.) If there is no `[]` indexing syntax then `end` cannot >> work`. Thus to construct the view you cannot use `end` but once you >> have it it works, e.g. `view(A, :, 2:end)[1,end]` >> >> On Wed, 2014-09-24 at 05:42, Ján Dolinský <jan.do...@2bridgz.com >> <javascript:>> wrote: >> > Hello, >> > >> > I am using ArrayViews but it seems that statements with "end" keyword >> are >> > not supported e.g. view(A, :, 2:end) throws an error and I have to use >> > view(A, :, 2:size(A,2)). Is this the way it is meant to be ? No "end" >> > keyword with ArrayViews ? >> > >> > Thanks, >> > Jan >> >> --
