This surprised me: julia> typeof(copy(rand(4,4)')) Matrix{Float64} (alias for Array{Float64, 2}) julia> typeof(deepcopy(rand(4,4)')) LinearAlgebra.Adjoint{Float64, Matrix{Float64}} I have an algorithm which looks prettier when written assuming row-major order. To ensure the code looks pretty and …

The interface of copy is mostly a convention, but generally if the argument is a wrapper that provides a “view” (eg Adjoint, PermutedDimsArray, SubArray), would you expect that it copies the parent and makes a similar view? This may be a reasonable use case in some contexts, but that’s not how it w…

Why is `copy(adjoint)` not an adjoint object?

Internals & Design

Krastanov February 16, 2021, 4:23am 2

More generally, why is copy not preserving the type of the object it is copying?

Topic		Replies	Views
What's the proper way of dealing with Adjoint? General Usage question	6	2478	August 23, 2021
Best practices regarding Adjoint, when should it be used instead of Array, best way to 'style it out' New to Julia	5	5545	July 23, 2020
Meaning of copy for arrays Internals & Design	11	3548	July 21, 2020
LinearAlgebra.eigen does not accept adjoint matrices ? General Usage	9	1872	August 16, 2018
Implementation for matrix multiplication with `adjoint` Performance linearalgebra	4	1096	September 17, 2019

Why is `copy(adjoint)` not an adjoint object?

Related topics