| % File src/library/stats/man/complete.cases.Rd |
| % Part of the R package, https://www.R-project.org |
| % Copyright 1995-2015 R Core Team |
| % Distributed under GPL 2 or later |
| |
| \name{complete.cases} |
| \alias{complete.cases} |
| \title{Find Complete Cases} |
| \description{ |
| Return a logical vector indicating which cases are complete, i.e., |
| have no missing values. |
| } |
| \usage{ |
| complete.cases(\dots) |
| } |
| \arguments{ |
| \item{\dots}{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 \code{\link{length}} or \code{\link{is.na}} |
| methods, for example \code{"\link{POSIXlt}"}, as described |
| in \PR{16648}. |
| } |
| \seealso{ |
| \code{\link{is.na}}, |
| \code{\link{na.omit}}, |
| \code{\link{na.fail}}. |
| } |
| \examples{ |
| 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] |
| } |
| \keyword{NA} |
| \keyword{logic} |