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Ingy döt Net 2013-04-11 01:07:29 -07:00
parent b83f433714
commit 68f8f3e56b
14735 changed files with 178959 additions and 0 deletions
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Task/Undefined-values/R/undefined-values-1.r Normal file
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exists("x")

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Task/Undefined-values/R/undefined-values-2.r Normal file
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x <- NULL

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Task/Undefined-values/R/undefined-values-3.r Normal file
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y <- c(1, 4, 9, NA, 25)
z <- c("foo", NA, "baz")

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Task/Undefined-values/R/undefined-values-4.r Normal file
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print_is_missing <- function(x)
{
print(missing(x))
}
print_is_missing() # TRUE
print_is_missing(123) # FALSE