Do-nothing na.action
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
.
na.keep(mf)
mf |
a model frame |
the same model frame with the "na.action"
attribute
Frank Harrell
Department of Biostatistics
Vanderbilt University
fh@fharrell.com
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)
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