?str
Bert Gunter
"The trouble with having an open mind is that people keep coming along and
sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
On Tue, Mar 17, 2020 at 12:19 PM Sparks, John <jspa...@uic.edu> wrote:
> Hi R-Helpers,
>
> I have recently started working with the iml package (Interpretable
> Machine Learning) and its associated material, which I generally find very
> helpful.
>
> I want to recover some values out of the FeatureEffect Object created by
> this library, but the form of the object is completely foreign to me.
>
> As a reproducible example:
>
>
> set.seed(42)
> library("iml")
> library("randomForest")
> data("Boston", package = "MASS")
> rf = randomForest(medv ~ ., data = Boston, ntree = 50)
>
> X = Boston[which(names(Boston) != "medv")]
> predictor = Predictor$new(rf, data = X, y = Boston$medv)
> imp = FeatureImp$new(predictor, loss = "mae")
> eff = FeatureEffect$new(predictor, feature = "rm")
> eff
>
>
> Interpretation method: FeatureEffect
> features: rm[numerical]
> grid size: 20
>
> Analysed predictor:
> Prediction task: unknown
>
>
> Analysed data:
> Sampling from data.frame with 506 rows and 13 columns.
>
> Head of results:
> .ale .type rm
> 1 -2.150574 ale 3.561
> 2 -2.610528 ale 5.304
> 3 -2.338677 ale 5.593
> 4 -2.265673 ale 5.709
> 5 -2.142912 ale 5.837
> 6 -2.085899 ale 5.885
>
> How can I refer to and get ahold of the table of 6 records above?
>
> I tried str(eff) and class(eff), but I am not familiar with the structure
> of the object(s).
>
> Would someone please tell me how to get inside the eff object, or point me
> to a reference as to what the class or structure of the object is?
>
> Thanks.
> --John Sparks
>
> [[alternative HTML version deleted]]
>
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>
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