[R] na.action in randomForest

[Uwe Ligges]

David Parkhurst wrote:

> The help page for randomForest shows na.action=na.fail as a parameter, and
> does not describe other possibilities for na.action.
> 
> I have a regression problem, with about 1000 rows in my data frame, and with
> an NA in occasional predictor variables, in about 5% of rows.  I would like
> to have all rows included in the analysis, to the extent possible.  (That
> seems to be possible in rpart, for example.)  Is it possible to specify that
> rows with a few NA's should be included in the randomForest analysis?  If
> so, how?

I don't know the design of randomForest, but if the authors have 
implemented na.action as in other functions, you can specify your own 
function here (typical one uses na.fail or na.omit).

Uwe Ligges