Skip to contents

utility to check which elements of vector are numbers, even if stored as text like "01"

Source: R/utils_is.numeric.text.R
is.numeric.text.Rd

utility to check which elements of vector are numbers, even if stored as text like "01"

Usage

# S3 method for class 'text'
is.numeric(x, na.is = c(NA, TRUE, FALSE)[1])

Arguments

x

character vector OR numeric vector

na.is

optional, what to return for the NA values (NA, TRUE, or FALSE)

Value

vector of TRUE / FALSE

Details

Checks which elements of vector contain only digits or leading/trailing spaces and have only zero or one period (decimal) and have only zero or one minus sign, which must be the first nonspace character if it is there.

Does not matter if stored as text character or numeric, so number can be stored as text like "01" or " -1.32" ".3" or "3." even "." ? even "-" ? NOT "- 2" and not "3-1" and not "2.0.6"

See also

is.numericish()