Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

MethodError: *(::Diagonal, ::ReverseDiff.TrackedArray) is ambiguous. #223

Open
tmigot opened this issue Mar 23, 2023 · 0 comments · May be fixed by #231
Open

MethodError: *(::Diagonal, ::ReverseDiff.TrackedArray) is ambiguous. #223

tmigot opened this issue Mar 23, 2023 · 0 comments · May be fixed by #231

Comments

@tmigot
Copy link

tmigot commented Mar 23, 2023

I got the following error when using ReverseDiff

using LinearAlgebra, ReverseDiff
n = 30
D = Diagonal([0.1 + 0.9 * (i - 1) / (n - 1) for i = 1:n])
F = x -> sqrt.(D) * (x .- 1)
x = ones(n)
ReverseDiff.gradient(x -> dot(F(x), x), x)

and got the following error

ERROR: MethodError: *(::Diagonal{Float64, Vector{Float64}}, ::ReverseDiff.TrackedArray{Float64, Float64, 1, Vector{Float64}, Vector{Float64}}) is ambiguous. Candidates:
  *(x::AbstractMatrix, y::ReverseDiff.TrackedArray{V, D, 1}) where {V, D} in ReverseDiff at .julia\packages\ReverseDiff\YkVxM\src\derivatives\linalg\arithmetic.jl:214
  *(x::AbstractArray, y::ReverseDiff.TrackedArray{V, D, 1}) where {V, D} in ReverseDiff at .julia\packages\ReverseDiff\YkVxM\src\derivatives\linalg\arithmetic.jl:214
  *(x::AbstractMatrix, y::ReverseDiff.TrackedArray{V, D}) where {V, D} in ReverseDiff at .julia\packages\ReverseDiff\YkVxM\src\derivatives\linalg\arithmetic.jl:214
  *(x::AbstractArray, y::ReverseDiff.TrackedArray{V, D}) where {V, D} in ReverseDiff at .julia\packages\ReverseDiff\YkVxM\src\derivatives\linalg\arithmetic.jl:214
  *(D::Diagonal, V::AbstractVector) in LinearAlgebra at julia-1.8.0\share\julia\stdlib\v1.8\LinearAlgebra\src\diagonal.jl:242
Possible fix, define
  *(::Diagonal, ::ReverseDiff.TrackedArray{V, D, 1}) where {V, D}
Stacktrace:
 [1] (::var"#3#4")(x::ReverseDiff.TrackedArray{Float64, Float64, 1, Vector{Float64}, Vector{Float64}})
   @ Main .\REPL[6]:1
 [2] (::var"#7#8")(x::ReverseDiff.TrackedArray{Float64, Float64, 1, Vector{Float64}, Vector{Float64}})
   @ Main .\REPL[9]:1
 [3] ReverseDiff.GradientTape(f::var"#7#8", input::Vector{Float64}, cfg::ReverseDiff.GradientConfig{ReverseDiff.TrackedArray{Float64, Float64, 1, Vector{Float64}, Vector{Float64}}})
   @ ReverseDiff .julia\packages\ReverseDiff\YkVxM\src\api\tape.jl:199
 [4] gradient(f::Function, input::Vector{Float64}, cfg::ReverseDiff.GradientConfig{ReverseDiff.TrackedArray{Float64, Float64, 1, Vector{Float64}, Vector{Float64}}}) (repeats 2 times)
   @ ReverseDiff .julia\packages\ReverseDiff\YkVxM\src\api\gradients.jl:22
 [5] top-level scope
   @ REPL[9]:1
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
None yet
Projects
None yet
Development

Successfully merging a pull request may close this issue.

1 participant