Do-nothing na.action

DESCRIPTION:

Does not delete rows containing NAs, but does add details concerning the distribution of the response variable if options(na.detail.response=TRUE). This na.action is primarily for use with describe.formula.

USAGE:

na.keep(mf)

ARGUMENTS:

mf
a model frame

VALUE:

the same model frame with the "na.action" attribute

AUTHOR(S):

Frank Harrell
Department of Biostatistics
Vanderbilt University
f.harrell@vanderbilt.edu

SEE ALSO:

, , , , , ,

EXAMPLES:

options(na.action="na.keep", na.detail.response=TRUE)
x1 <- runif(20)
x2 <- runif(20)
x2[1:4] <- NA
y <- rnorm(20)
describe(y ~ x1*x2)