tree: na.tree.replace – R documentation

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na.tree.replace

Replace NAs in Predictor Variables

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.