# complete.cases

0th

Percentile

##### Find Complete Cases

Return a logical vector indicating which cases are complete, i.e., have no missing values.

Keywords
logic, NA
##### Usage
complete.cases(…)
##### Arguments

a sequence of vectors, matrices and data frames.

##### Value

A logical vector specifying which observations/rows have no missing values across the entire sequence.

##### Note

A current limitation of this function is that it uses low level functions to determine lengths and missingness, ignoring the class. This will lead to spurious errors when some columns have classes with length or is.na methods, for example "POSIXlt", as described in 16648.

is.na, na.omit, na.fail.
library(stats) # NOT RUN { x <- airquality[, -1] # x is a regression design matrix y <- airquality[, 1] # y is the corresponding response stopifnot(complete.cases(y) != is.na(y)) ok <- complete.cases(x, y) sum(!ok) # how many are not "ok" ? x <- x[ok,] y <- y[ok] # }