na.tree.replace(tree) | R Documentation |
Adds a new level called "NA"
to any discrete predictor in a data frame that
contains NA
s. 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 NA
s.