[R] Apology RE:interpreting output from predict.blackboost

[Kirsten Barrett]

I apologize for multiple postings of the question below.  My email
responded with error messages each time I attempted to post and the
postings did not appear in my sent messages. I was not aware (until
notified) that multiple copies had been sent.

Kirsten Barrett

On Mon, Nov 10, 2008 at 4:02 PM, Kirsten Barrett <kbarrett at usgs.gov> wrote:
> I would like to use blackboost on a training data set, then use the
> output to predict a testing dataset, and finally evaluate the errors.
> An example of the code I have written is the following:
>
> train <- read.csv ("train.csv")
> test <- read.csv ("test.csv")
>
> boost <- blackboost (ogred ~ elev + slope + aspect, data = train)
> pred <- predict (boost, newdata = test)
>
> pred yields the following matrix:
>
>  [1] 2.697689 3.551352 2.761541 3.271642 2.313459 2.207247 1.591521 3.752257
>  [9] 2.976793 2.522219 1.988676 2.092666 3.550917 2.134925 2.534842 2.922136
> [17] 2.277653 2.922136 2.922136 4.593132 2.922136 3.773274 4.647789 3.773274
> [25] 4.647789 2.369810 2.645859 2.344808 1.760087 2.918108 2.714825 2.972284
> [33] 3.466973 2.001098 1.706958 1.749830 1.960923 1.960923 2.451370 2.835255
> [41] 2.443585 3.392883 3.164294 2.615430
>
> I would like to know how to use this output to classify data the
> testing dataset. Any advice is much appreciated.
>
> Thank you,
> Kirsten
>
> --
> Kirsten Barrett
> Mendenhall Postdoctoral Fellow, USGS
> Alaska Science Center
> 4210 University Drive
> Anchorage, AK
>
> phone (907) 786 7419
> fax (907) 786 7401
>
> kbarrett at usgs.gov
>

-- 
Kirsten Barrett
Mendenhall Postdoctoral Fellow, USGS
Alaska Science Center
4210 University Drive
Anchorage, AK

phone (907) 786 7419
fax (907) 786 7401

kbarrett at usgs.gov