abs                   package:base                   R Documentation

Miscellaneous Mathematical Functions

Description:

     These functions compute miscellaneous mathematical functions. The
     naming follows the standard for computer languages such as C or
     Fortran.

Usage:

     abs(x)
     sqrt(x)

Arguments:

       x: a numeric vector

See Also:

     `Arithmetic' for simple, `log' for logarithmic, `sin' for
     trigonometric, and `Special' for special mathematical functions.

Examples:

     xx <- -9:9
     plot(xx, sqrt(abs(xx)),  col = "red")
     lines(spline(xx, sqrt(abs(xx)), n=101), col = "pink")

