invalid {gtools} | R Documentation |
Test if a value is missing, empty, contains only NA or NULL values, or is a try-error.
invalid(x)
x |
value to be tested |
Logical value.
Gregory R. Warnes greg@warnes.net
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)