R help - Apr 2012 - Help predicting random forest-like data

Hi,

I have been using some code for multivariate random forests.  The output
from this code is a list object with all the same values as from
randomForest, but the model object is, of course, not of the class
randomForest.  So, I was hoping to modify the code for predict.randomForest
to work for predicting the multivariate model to new data.  This is my
first attempt at modifying code from a library ....and I am afraid I am
already out of my depth.  I was able to access the predict.randomForest
code, and extract the relevant information, but this code it calls a
function regForest that I cannot seem to find/access.

Another blog gave the following instructions for accessing the regForest
function: "Download the source package of randomForest, extract the tar.gz
and look in the src directory. In rf.c you will see the function
classForest (and for regression look at regForest in regrf.c)."

I downloaded the randomForest tar.gz and extracted it using 7 zip, but I do
not get an src directory.  I only get a gz file called
randomForest_4.6-6.tar.gz.   The randomForest library already is installed
in R, so I looked in the main src directory in R, but there isn't any rf.c
or other randomForest related information there.   I am sure I am making
some easy to remedy mistake, but I can't figure it out.

Any assistance would be greatly appreciated.

- Katharine

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On 10.04.2012 23:03, Katharine Miller wrote:
> Hi,
>
> I have been using some code for multivariate random forests.  The output
> from this code is a list object with all the same values as from
> randomForest, but the model object is, of course, not of the class
> randomForest.  So, I was hoping to modify the code for predict.randomForest
> to work for predicting the multivariate model to new data.  This is my
> first attempt at modifying code from a library ....and I am afraid I am
> already out of my depth.  I was able to access the predict.randomForest
> code, and extract the relevant information, but this code it calls a
> function regForest that I cannot seem to find/access.
>
> Another blog gave the following instructions for accessing the regForest
> function: "Download the source package of randomForest, extract the
tar.gz
> and look in the src directory. In rf.c you will see the function
> classForest (and for regression look at regForest in regrf.c)."
>
> I downloaded the randomForest tar.gz and extracted it using 7 zip, but I do
> not get an src directory.  I only get a gz file called
> randomForest_4.6-6.tar.gz.

Then you have not extracted it. 7zip should be capable, but installing 
Rtools and using

tar xfz randomForest_4.6-6.tar.gz

from the operating system's shell should do as documented.

Uwe Ligges



The randomForest library already is installed
> in R, so I looked in the main src directory in R, but there isn't any
rf.c
> or other randomForest related information there.   I am sure I am making
> some easy to remedy mistake, but I can't figure it out.
>
> Any assistance would be greatly appreciated.
>
> - Katharine
>
> 	[[alternative HTML version deleted]]
>
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