is_something {pkgmaker}

Testing Object Type

Description

Testing Object Type

is_NA tests if a variable is exactly NA (logical, character, numeric or integer)

isFALSE Tests if a variable is exactly FALSE.

isNumber tests if a variable is a single number

isReal tests if a variable is a single real number

isInteger tests if an object is a single integer

isString tests if an object is a character string.

is.dir tests if a filename is a directory.

is.file tests if a filename is a file.

hasNames tests if an object has names.

Usage

is_NA(x)

isFALSE(x)

isNumber(x)

isReal(x)

isInteger(x)

isString(x, y, ignore.case = FALSE)

is.dir(x)

is.file(x)

hasNames(x, all = FALSE)

Arguments

x

an R object

y

character string to compare with.

ignore.case

logical that indicates if the comparison should be case sensistive.

all

logical that indicates if the object needs all names non empty

Value

TRUE or FALSE

See Also

isTRUE