Save and load the model generated by surrogates.jl

Specific Domains Modelling & Simulations
1

Hello Community,

How can I save and load the model generated by surrogates.jl?

2

IIRC JLD2 works.

1 Like
3

Thanks!

4

@ChrisRackauckas
After some tests, I think JLD2 or BSON can’t serialize the Julia function, and the Surrogates.jl returns Julia function as result. For example, RandomForestSurrogate returns the model (::RandomForestSurrogate{Vector{Float64}, Vector{Float64}, XGBoost.Booster, Float64, Float64, Int64}) (generic function with 2 methods).

When I load the model, it throws the error:

UndefVarError: XGBoost not defined

Stacktrace:
  [1] (::BSON.var"#31#32")(m::Module, f::String)
    @ BSON ~/.julia/packages/BSON/rOaki/src/extensions.jl:21
  [2] BottomRF
    @ ./reduce.jl:81 [inlined]
  [3] _foldl_impl(op::Base.BottomRF{BSON.var"#31#32"}, init::Module, itr::Vector{Any})
    @ Base ./reduce.jl:58
  [4] foldl_impl
    @ ./reduce.jl:48 [inlined]
  [5] mapfoldl_impl
    @ ./reduce.jl:44 [inlined]
  [6] _mapreduce_dim
    @ ./reducedim.jl:327 [inlined]
  [7] #mapreduce#725
    @ ./reducedim.jl:322 [inlined]
  [8] #reduce#727
    @ ./reducedim.jl:371 [inlined]
  [9] resolve(fs::Vector{Any}, init::Module)
    @ BSON ~/.julia/packages/BSON/rOaki/src/extensions.jl:21
 [10] (::BSON.var"#35#36")(d::Dict{Symbol, Any}, init::Module)
    @ BSON ~/.julia/packages/BSON/rOaki/src/extensions.jl:64
 [11] _raise_recursive(d::Dict{Symbol, Any}, cache::IdDict{Any, Any}, init::Module)
    @ BSON ~/.julia/packages/BSON/rOaki/src/read.jl:80

I am from python to Julia, and confused that is there any fit method in Surrogates.jl ?

5

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