Extracts incomplete cases from a data set. Missing values in x are coded
as NA.
The companion function for selecting the complete cases is cc().
Usage
ic(x, drop = TRUE)
Arguments
x
An R object. Currently supported are methods for the
following classes: mids, mira, mipo, data.frame
and matrix. In addition, x can be a vector of any kind.
drop
A logical flag for matrices and arrays. If drop=TRUE the
result is coerced to the lowest possible dimension.
Value
A vector, matrix of data.frame containing the data of the incomplete
cases.
ic(nhanes) # get the 12 rows with incomplete casesic(nhanes[1:10,]) # incomplete cases within the first ten rowsic(nhanes[,2:3]) # restrict extraction to variables bmi and hyp