Greetings,

I am exploring some random forest analysis methods and have come upon one
aspect I don't fully understand from any manual.  The code of interest is
as follows from the randomForest package:

myiris=cbind(iris[1:4], matrix(runif(508*nrow(iris)),nrow(iris),508))

This would be following by the rfcv() function for cross-validation but I
am confused about the former syntax.

My question is why 508?  Is this some arbitrary number that one just
chooses are is there some logic to the choice?  I have looked through the
package documentation and the runif() help which tells me that runif(n,
min=0, max=1):
n=length of observations
min&max = lower and upper limits

I still don't follow exactly what is taking place here.

Regards,
Charles

	[[alternative HTML version deleted]]

