to_numeric: Numeric Vectors - expanded

In jmbarbone/dirtyr: Deals with dirty data

Description

Wrappers for working with numeric vectors

Usage

to_numeric(x, int = TRUE)

maybe_numeric(x, names = FALSE)

maybe_integer(x, names = FALSE)

Arguments

x	A vector
int	Logical. Integer control, if TRUE will determine if vector may be integers.
names	Logical. If true, supplies original value as name.

Details

Unlike, 'as.numeric()', 'to_numeric()' will return outpus as integers or as doubles.

Factors are also specially handled as a numeric value is derived from the factor value rather than the factor level.

'maybe_numeric' can be used to check is a value, possibly stored as text, can be safely converted. When 'int = TRUE', 'maybe_integer()' is employed to evaluation the vector. If all values could be integers, the vector is returned as an integer.

Examples

## with characters
x <- c(as.character(1:5), NA, letters[1:2], "1e4")
suppressWarnings(as.numeric(x))  ## will throw an error
to_numeric(x)                    ## converts NA to NaN
maybe_numeric(x, names = TRUE)

## With factors
f <- factor(c(seq(0, 1, .2), "No", "Na_character_"))
suppressWarnings(as.numeric(f))  ## uses factor level instead of text
to_numeric(f)                    ## uses text values instead
maybe_numeric(f, names = TRUE)

jmbarbone/dirtyr documentation built on Sept. 23, 2020, 4:05 a.m.