Re: [R] listing components of an object

From: Patrick Burns <>
Date: Mon, 03 Mar 2008 09:31:36 +0000



do what you want?

Patrick Burns
+44 (0)20 8525 0696
(home of S Poetry and "A Guide for the Unwilling S User")

Nair, Murlidharan T wrote:

>Is there a method to list the components of an object, instead of looking at the help for that method? Let me be more clear with an example
> ## tune `svm' for classification with RBF-kernel (default in svm),
> ## using one split for training/validation set
> obj <- tune(svm, Species~., data = iris,
> ranges = list(gamma = 2^(-1:1), cost = 2^(2:4)),
> tunecontrol = tune.control(sampling = "fix")
> )
> ## alternatively:
> ## obj <- tune.svm(Species~., data = iris, gamma = 2^(-1:1), cost = 2^(2:4))
> summary(obj)
> plot(obj)
>For tune, an object of class tune, including the components:
>best.parameters a 1 x k data frame, k number of parameters.
>best.performance best achieved performance.
>performances if requested, a data frame of all parameter combinations along with the corresponding performance results.
>train.ind list of index vectors used for splits into training and validation sets.
>best.model if requested, the model trained on the complete training data using the best parameter combination.
>I got the above by doing ?tune.
>Is there a function that helps be do this?
>Thanks ../Murli
> mailing list
>PLEASE do read the posting guide
>and provide commented, minimal, self-contained, reproducible code.
> mailing list PLEASE do read the posting guide and provide commented, minimal, self-contained, reproducible code. Received on Mon 03 Mar 2008 - 09:33:18 GMT

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