Hi! I have a type that looks like struct A{X1<:AbstractArray, X2<:AbstractArray} x1::X1 x2::X2 end a = A([1, 2], [1 2; 3 4]) b = A([1, 4], [-1 2; -3 4]) and I’d like to extend broadcasting such that, for example, a .= b .- a is equivalent to a.x1 .= b.x1 .- a.x1 a.x2 .= b.x2 .- a.x2 Is …

For future reference: I finally managed to do what I wanted to do here: Copy and broadcasting for ProductRepr by mateuszbaran · Pull Request #336 · JuliaManifolds/Manifolds.jl · GitHub and it works well enough for me. I hope it’s a good reason to post in this (very old) thread :sweat_smile: .

you should switch to “mutable struct” then.

I don’t need to change x1 or x2, only their content.

Have you seen https://docs.julialang.org/en/v1/manual/interfaces/#man-interfaces-broadcasting-1 ?

Yes, I’ve seen that and it was very helpful when I just needed to forward broadcasting to a single wrapped array (although even then I had to look at the code of StaticArrays to make it work well because for example it does not mention that it’s a good idea to add a new method to Base.dataids like h…

Check out [image] Customizing Broadcasting Recursively for Collections of Arrays General Usage I previously asked this question and am aware of the section in the manual about customizing broadcasting. However, rather than defining a new type which behaves like a single …

Thanks, I didn’t notice that thread. I’ll try something out.

Broadcasting over a struct with two arrays

General Usage

mbauman July 8, 2019, 3:39pm 6

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Broadcasting over a struct with two arrays

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