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R, caret: what does returnResamp mean in trainControl?

In R, caret package: What does returnResamp mean in trainControl?

From the help information, returnResamp is a character string indicating how much of the resampled summary metrics should be saved. Values can be "final", "all" or "none". But really, what does it mean?

I could understand (or guess) what is savePredictions, which is how to save predicted value. Namely, three options, "none" = don't save, "final" use indexFinal to predict, "all" use all data points to predict. But what is returnResamp?

Solution

  • returnResamp returns information on the resamples

    It has three possible values as you mentioned:

    none - do not so any info final - show the info of the final resampling all - show info about all resamples

    You can see an example here:

    Caret package for R. Which samples are held out?