Repository: JuliaAI/MLJBase.jl (julia)

Issue:
Update to LossFunctions.jl v0.9
@ablaom we refactored LossFunctions.jl and changed the order of output and prediction arguments to be more consistent with other ecosystems as you requested at some point in the past. Can you please update this package to use the latest release?

We also removed the ObsDim submodule and the OrdinalMarginLoss as they were not very useful nor very used in downstream projects we maintain.

Pull request description:
Closes: #896 #570

Patch:
diff --git a/Project.toml b/Project.toml
index cfa765dd..5fea7dce 100644
--- a/Project.toml
+++ b/Project.toml
@@ -35,7 +35,7 @@ CategoricalDistributions = "0.1"
 ComputationalResources = "0.3"
 Distributions = "0.25.3"
 InvertedIndices = "1"
-LossFunctions = "0.5, 0.6, 0.7, 0.8"
+LossFunctions = "0.9"
 MLJModelInterface = "1.7"
 Missings = "0.4, 1"
 OrderedCollections = "1.1"
diff --git a/src/measures/loss_functions_interface.jl b/src/measures/loss_functions_interface.jl
index 3ee9ed6c..42e9bdbf 100644
--- a/src/measures/loss_functions_interface.jl
+++ b/src/measures/loss_functions_interface.jl
@@ -44,7 +44,7 @@ err_wrap(n) = ArgumentError("Bad @wrap syntax: $n. ")
 
 # We define amacro to wrap a concrete `LossFunctions.SupervisedLoss`
 # type and define its constructor, and to define property access in
-# case of paramters; the macro also defined calling behaviour:
+# case of parameters; the macro also defines calling behaviour:
 macro wrap_loss(ex)
     ex.head == :call || throw(err_wrap(1))
     Loss_ex = ex.args[1]
@@ -130,7 +130,7 @@ MMI.prediction_type(::Type{<:DistanceLoss}) = :deterministic
 MMI.target_scitype(::Type{<:DistanceLoss}) = Union{Vec{Continuous},Vec{Count}}
 
 call(measure::DistanceLoss, yhat, y) =
-    LossFunctions.value(getfield(measure, :loss), y, yhat)
+    LossFunctions.value(getfield(measure, :loss), yhat, y)
 
 function call(measure::DistanceLoss, yhat, y, w::AbstractArray)
     return w .* call(measure, yhat, y)
@@ -148,7 +148,7 @@ _scale(p) = 2p - 1
 function call(measure::MarginLoss, yhat, y)
     probs_of_observed = broadcast(pdf, yhat, y)
     return (LossFunctions.value).(getfield(measure, :loss),
-                                  1, _scale.(probs_of_observed))
+                                  _scale.(probs_of_observed), 1)
 end
 
 call(measure::MarginLoss, yhat, y, w::AbstractArray) =


Test patch:
diff --git a/test/measures/loss_functions_interface.jl b/test/measures/loss_functions_interface.jl
index 30fe057e..d5894eb8 100644
--- a/test/measures/loss_functions_interface.jl
+++ b/test/measures/loss_functions_interface.jl
@@ -42,12 +42,9 @@ end
 
     for M_ex in MARGIN_LOSSES
         m = eval(:(MLJBase.$M_ex()))
-        @test m(yhat, y) ≈ LossFunctions.value(getfield(m, :loss), ym, yhatm)
-        @test MLJBase.Mean()(m(yhat, y, w)) ≈
-            LossFunctions.value(getfield(m, :loss),
-                                ym,
-                                yhatm,
-                                WeightedSum(w))/N
+        @test m(yhat, y) ≈ LossFunctions.value(getfield(m, :loss), yhatm, ym)
+        @test m(yhat, y, w) ≈
+            w .* LossFunctions.value(getfield(m, :loss), yhatm, ym)
     end
 end
 
@@ -64,10 +61,8 @@ end
         m_ex = MLJBase.snakecase(M_ex)
         @test m == eval(:(MLJBase.$m_ex))
         @test m(yhat, y) ≈
-            LossFunctions.value(getfield(m, :loss), y, yhat)
-        @test mean(m(yhat ,y, w)) ≈
-            LossFunctions.value(getfield(m, :loss), y, yhat,
-                                WeightedSum(w))/N
-
+            LossFunctions.value(getfield(m, :loss), yhat, y)
+        @test m(yhat ,y, w) ≈
+            w .* LossFunctions.value(getfield(m, :loss), yhat, y)
     end
 end