Does row-wise deletion as na.omit, but adds frequency of missing values
for each predictor
to the "na.action" attribute of the returned model frame.
Optionally stores further details if options(na.detail.response=TRUE).
Usage
na.delete(frame)
Value
a model frame with rows deleted and the "na.action" attribute added.
Arguments
frame
a model frame
Author
Frank Harrell
Department of Biostatistics
Vanderbilt University
fh@fharrell.com