all(..., na.rm=FALSE) any(..., na.rm=FALSE)
all returns a
logical value indicating whether or not all of the elements of
x are TRUE.
The value returned is TRUE if all the values in x are
TRUE, and FALSE if any the values in x are
FALSE. If x consists of a mix of TRUE and
NA values, then all returns NA.
Given a sequence of logical arguments, any returns a
logical value indicating whether or not any of the elements of
x are TRUE.
The value returned is TRUE if any the values in x are
TRUE, and FALSE if all the values in x are
FALSE. If x consists of a mix of FALSE and
NA values, then any returns NA.
For both functions the argument na.rm indicates whether
NA values should be removed before the result is computed.
range(x <- sort(round(rnorm(10) - 1.2,1)))
if(any(x < 0)) cat("x contains negative values\n")
if(all(x < 0)) cat("all x values are negative\n")