How to use Measurements in Optim

[hzgzh]

Hi:
I want to use some Measurements variable in optim problem.
but have some error,how do I handle it,wish to get reply

using Measurements,Optim
f(x)=(1.0 - x[1])^2 + 100.0 * (x[2] - x[1]^2)^2
x=zeros(Measurement{Float64},2)
optimize(f,x)

MethodError: no method matching Float64(::Measurement{Float64})
Closest candidates are:
  Float64(::Real, !Matched::RoundingMode) where T<:AbstractFloat at rounding.jl:200
  Float64(::T) where T<:Number at boot.jl:715
  Float64(!Matched::Int8) at float.jl:60
  ...

Stacktrace:
 [1] convert(::Type{Float64}, ::Measurement{Float64}) at .\number.jl:7
 [2] Optim.MultivariateOptimizationResults{NelderMead{Optim.AffineSimplexer,Optim.AdaptiveParameters},Float64,Array{Measurement{Float64},1},Measurement{Float64},Measurement{Float64},Array{OptimizationState{Measurement{Float64},NelderMead{Optim.AffineSimplexer,Optim.AdaptiveParameters}},1},Bool}(::NelderMead{Optim.AffineSimplexer,Optim.AdaptiveParameters}, ::Array{Measurement{Float64},1}, ::Array{Measurement{Float64},1}, ::Measurement{Float64}, ::Int64, ::Bool, ::Bool, ::Measurement{Float64}, ::Measurement{Float64}, ::Measurement{Float64}, ::Measurement{Float64}, ::Bool, ::Measurement{Float64}, ::Measurement{Float64}, ::Measurement{Float64}, ::Measurement{Float64}, ::Bool, ::Measurement{Float64}, ::Measurement{Float64}, ::Bool, ::Array{OptimizationState{Measurement{Float64},NelderMead{Optim.AffineSimplexer,Optim.AdaptiveParameters}},1}, ::Int64, ::Int64, ::Int64, ::Bool, ::Float64, ::Float64) at C:\Users\Administrator\.julia\packages\Optim\SFpsz\src\types.jl:167
 [3] optimize(::NonDifferentiable{Measurement{Float64},Array{Measurement{Float64},1}}, ::Array{Measurement{Float64},1}, ::NelderMead{Optim.AffineSimplexer,Optim.AdaptiveParameters}, ::Optim.Options{Float64,Nothing}, ::Optim.NelderMeadState{Array{Measurement{Float64},1},Measurement{Float64},Array{Measurement{Float64},1}}) at C:\Users\Administrator\.julia\packages\Optim\SFpsz\src\multivariate\optimize\optimize.jl:98
 [4] optimize(::NonDifferentiable{Measurement{Float64},Array{Measurement{Float64},1}}, ::Array{Measurement{Float64},1}, ::NelderMead{Optim.AffineSimplexer,Optim.AdaptiveParameters}, ::Optim.Options{Float64,Nothing}) at C:\Users\Administrator\.julia\packages\Optim\SFpsz\src\multivariate\optimize\optimize.jl:33
 [5] optimize(::Function, ::Array{Measurement{Float64},1}; inplace::Bool, autodiff::Symbol, kwargs::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}) at C:\Users\Administrator\.julia\packages\Optim\SFpsz\src\multivariate\optimize\interface.jl:64
 [6] optimize(::Function, ::Array{Measurement{Float64},1}) at C:\Users\Administrator\.julia\packages\Optim\SFpsz\src\multivariate\optimize\interface.jl:58
 [7] top-level scope at In[48]:1

[giordano]

Maybe @pkofod has some ideas 🙂

[hzgzh]

fine I will @pkofod

[giordano]

For reference, an issue has been opened in Optim.jl: JuliaNLSolvers/Optim.jl#823

[pkofod]

sorry I did not see this issue. Will think about the feedback Mosè gave on the other issue.