Hi,
Can someone please offer me some guidance?
I imported some data. One of the columns called "JOBTITLE" when imported was
imported as a factor column with 416 levels.
I subset the data in such a way that only 4 levels have data in "JOBTITLE" and
tried running randomForest but it complained about "JOBTITLE" having more than
32 categories. I know that is the limit in randomForest but I guess I don't
understand enough about factors because I thought by subsetting the data this
no longer would be an issue. BTW I can run randomForest on this dataset if I
exclude "JOBTITLE".
So I then converted that column to a character vector:
> TRAINSET$JOBTITLE<-as.character(TRAINSET$JOBTITLE)
I ran Random Forest and got the below error. Why isn't this working? What do I
need to do to get this working?
> library(randomForest)
> FOREST_model <- randomForest(as.factor(TARGET)~., data=trainset, mtry=4,
> ntree=1000,
+ importance=TRUE, do.trace=100)
Error in randomForest.default(m, y, ...) :
NA/NaN/Inf in foreign function call (arg 1)
In addition: Warning message:
In data.matrix(x) : NAs introduced by coercion
Your help will be greatly appreciated.
Dan
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