Why is the error reported? UndefVarError: fit! not defined

[Jianqing001]

julia> using RDatasets: dataset

julia> iris = dataset(“datasets”, “iris”);

julia> first(iris, 5) … julia> X = convert(Array, iris[!, [:SepalLength, :SepalWidth, :PetalLength, :PetalWidth]]) … julia> y = convert(Array, iris[!, :Species]) … julia> using ScikitLearn

julia> @sk_import linear_model: LogisticRegression PyObject <class ‘sklearn.linear_model._logistic.LogisticRegression’>

julia> model = LogisticRegression(fit_intercept=true, max_iter = 200) PyObject LogisticRegression(max_iter=200) julia> fit!(model, X, y); UndefVarError: fit! not defined

Stacktrace:

[2] include_string(::Function, ::Module, ::String, ::String) at .\loading.jl:1091

[OkonSamuel]

use

model.fit(X, y)

instead

[OkonSamuel]

Ok am finally with a laptop. And i just checked out your issue. The issue isn't with the API but rather with the eltype of y. Since LogisticRegression is a Classifier the eltype of the target vector y can only be an instance of Integer type. eg. Int or Bool

So the following rough code works

julia> using RDatasets: dataset

julia> iris = dataset(“datasets”, “iris”);

julia> X = convert(Array, iris[!, [:SepalLength, :SepalWidth, :PetalLength, :PetalWidth]]);

julia> y = convert(Array, iris[!, :Species]);

julia> uniq_y = unique(y)
3-element Array{String,1}:
 "setosa"
 "versicolor"
 "virginica"
julia> y_int = replace(y, (uniq_y .=> range(0, stop=length(uniq_y)-1))...)
150-element Array{Any,1}:
 0
 0
 0
 0
 0
 0
 0
 0
 0
 0
 0
 0
 0
 ⋮
 2
 2
 2
 2
 2
 2
 2
 2
 2
 2
 2
 2

julia> using ScikitLearn

julia> @sk_import linear_model: LogisticRegression

julia> model = LogisticRegression(fit_intercept=true, max_iter = 200)
PyObject LogisticRegression(max_iter=200)

julia> fit!(model, X, y)
PyObject LogisticRegression(max_iter=200)

julia> predict(model, X)
150-element Array{Any,1}:
 "setosa"
 "setosa"
 "setosa"
 "setosa"
 "setosa"
 "setosa"
 "setosa"
 "setosa"
 "setosa"
 "setosa"
 "setosa"
 "setosa"
 "setosa"
 ⋮
 "virginica"
 "virginica"
 "virginica"
 "virginica"
 "virginica"
 "virginica"
 "virginica"
 "virginica"
 "virginica"
 "virginica"
 "virginica"
 "virginica"

I hope this was helpful

Feel free to close this issue if satisfied

[cstjean]

@OkonSamuel I don't understand how he could get this error though:

julia> fit!(model, X, y);
UndefVarError: fit! not defined

@Jianqing001 maybe you imported (using ...) some other module that also defined fit! before?

[OkonSamuel]

@OkonSamuel I don't understand how he could get this error though:

Another thing that could lead to his error is importing ScikitLearn as shown below

using ScikitLearn: @sk_import

[cstjean]

Closing as an answered question...