| na.tree.replace(tree) | R Documentation |
Adds a new level called "NA" to any discrete predictor in a data frame that
contains NAs. Stops if any continuous predictor contains an NA.
na.tree.replace(frame)
frame |
data frame used to grow a tree. |
This function is used via the na.action argument to tree.
data frame such that a new level named "NA" is added to any discrete
predictor in frame with NAs.