getting best model out of autoML

[nbeule]

Dim experiment As RegressionExperiment = mlContext.Auto().CreateRegressionExperiment(AutoMLSettings)

Dim result As ExperimentResult(Of RegressionMetrics) = experiment.Execute(trainData, CurrentProject.DependentVariable.Tagname, progressHandler:=progressHandler)

Dim model As ITransformer = result.BestRun.Model

Dim model As ITransformer = model.Transform(trainData)

castedModel = TryCast(model, RegressionPredictionTransformer(Of Trainers.FastTree.FastTreeRegressionModelParameters))

i dont understand why this cast isn't working in a situation that returns "FastTreeRegression" for model.BestRun.TrainerName

i have a situation where I cant write a class for the data ahead of time which are the only examples I can find

thanks for any help!

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