invalid {gtools} | R Documentation |
Test if a value is missing, empty, contains only NA or NULL values, or is a try-error.
Description
Test if a value is missing, empty, contains only NA or NULL values, or is a try-error.
Usage
invalid(x)
Arguments
x |
value to be tested |
Value
Logical value.
Author(s)
Gregory R. Warnes greg@warnes.net
See Also
Examples
invalid(NA)
invalid()
invalid(c(NA, NA, NULL, NA))
invalid(list(a = 1, b = NULL))
x <- try(log("A"))
invalid(x)
# example use in a function
myplot <- function(x, y) {
if (invalid(y)) {
y <- x
x <- 1:length(y)
}
plot(x, y)
}
myplot(1:10)
myplot(1:10, NA)
[Package gtools version 3.9.5 Index]