[R] creating a list of lists

[Weiwei Shi]

change
 forests <- c(forests, forest);
into
 forests[[level]] <- forest



On 1/6/07, Paul Boutros <paul.boutros at utoronto.ca> wrote:
> Hello,
>
> I'm trying to create a series of randomForest objects, basically in a
> loop like this:
>
> forests <- list();
>
> for (level in 1:10) {
>
>           # do some other things here
>
>         # create a random forest
>         forest <- randomForest(
>                 x = x.level,
>                 y = z.level,
>                 ntree = trees
>                 );
>
>         forests <- c(forests, forest);
>
>         }
>
>
> But instead of creating a list of 10 forests, this creates a list of
> 180 elements, 18 for each forest.  Is there a way to create a list of
> randomForest objects for use later on in code like:
>
> for (forest in forests) {
>          values <- predict(forest, data);
>          # do things with these predicted values
>          }
>
> Sincerely,
> Paul
>
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>


-- 
Weiwei Shi, Ph.D
Research Scientist
GeneGO, Inc.

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