Markos Kapes (Apr 24 2024 at 03:05): Markos Kapes (Apr 24 2024 at 03:05):I'm trying to use a2d mask as a partial reference to a 4d, like so....
glcm[i, j, mask] = 1
mask is a 512x512 Boolean Array. But it gives the error....
BoundsError: attempt to access 8×8×512×512 Array{UInt8, 4} at index [1, 1, 512×512 BitMatrix]
So I tried it with a toy example.....
begin
levels = 8
h , w = 6, 6
glcm = zeros(UInt8, (levels, levels, h, w))
a = I(6) .== 1
glcm[1, 1, a] .= 1
end
and i don't get an error..... what am I missing here?
Jakob Nybo Nissen (Apr 24 2024 at 10:40):In the first example, you forgot the dot before the equal sign in the assignment
Markos Kapes (Apr 25 2024 at 06:08):Thanks for catching that.... but it apparently wasn't the (only) problem... still coming up with BoundsError before it even gets to assignment....
Gunnar Farnebäck (Apr 25 2024 at 10:14):I don't think you can do partial Boolean indexing in general. It seems like your toy example works thanks to peculiarities of the Diagonal type. For a workaround, you could try @view(glcm[i, j, :, :])[mask] .= 1.
Last updated: Nov 06 2024 at 04:40 UTC