[R] randomForest predictions with new data

[Uwe Ligges]

On 25.04.2010 16:27, Rolf Edberg wrote:
> Hi
>
> I am new to R, randomForest and I have read about how to use it in your old
> mails. I have also run the predictions examples from CRAN. But I still don't
> understand how to use it right.
>
>
>
> The thing that I don't understand is how to run the result from the
> randomForest on one line (post) with newdata to get a good guess. What I
> mean is if I put in a new observation of iris how do I see what flower it
> is? And with what probability (proximity) is that guess?
>
>



See ?predict.randomForest


>
> I have taken a random post from iris database and taken the species data
> away and tried to use it as new data but I have not succeeded in finding out
> what species it is.
>
>
>
> How do I write that in R?
>

See ?predict.randomForest


>
> And how do I get the guess if it is a regression problem?
>

See ?predict.randomForest



>
> Is it possible to get it with unsupervised learning? One post with new data
> resulting in a good guess?


What? The Species?  How should R know the species if it is unsupervised?

Best,
Uwe Ligges

>
>
> Thank you
>
> Rolf
>
>
>
>
>
>
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>
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