sign

From base v3.6.2 by R-core R-core@R-project.org

Sign Function

sign returns a vector with the signs of the corresponding elements of x (the sign of a real number is 1, 0, or $-1$ if the number is positive, zero, or negative, respectively).

Note that sign does not operate on complex vectors.

Keywords: arith

Usage

sign(x)

Arguments

x: a numeric vector

Details

This is an internal generic primitive function: methods can be defined for it directly or via the Math group generic.

Examples

library(base)

# NOT RUN {
sign(pi)    # == 1
sign(-2:3)  # -1 -1 0 1 1 1
# }

Documentation reproduced from package base, version 3.6.2, License: Part of R 3.6.2

Community examples

richie@datacamp.com at Jan 17, 2017 base v3.3.2

Positive numbers return 1; negative numbers return -1, zero returns zero. Missing values and `NaN` are still missing and `NaN` respectively. ```{r} x <- c( -Inf, -pi, -2, -1, -.Machine$double.xmin, 0, .Machine$double.xmin, 1, 2, pi, Inf, NA, NaN ) data.frame(x = x, sign_x = sign(x)) ```