limma (version 3.28.14)

isNumeric: Test for Numeric Argument

Description

Test whether argument is numeric or a data.frame with numeric columns.

Usage

isNumeric(x)

Arguments

x
any object

Value

or FALSE

Details

This function is used to check the validity of arguments for numeric functions. It is an attempt to emulate the behavior of internal generic math functions.

isNumeric differs from is.numeric in that data.frames with all columns numeric are accepted as numeric.

See Also

is.numeric, Math

Examples

isNumeric(3)
isNumeric("a")
x <- data.frame(a=c(1,1),b=c(0,1))
isNumeric(x)   # TRUE
is.numeric(x)  # FALSE