| abs {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 or |
Details
These are generic functions: methods can be defined for them
individually or via the Math group generic. For complex
arguments (and the default method), z,
abs(z) == Mod(z) and sqrt(z) == z^0.5.
References
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth \& Brooks/Cole.
See Also
Arithmetic for simple, log for logarithmic,
sin for trigonometric, and Special for
special mathematical functions.
Examples
require(stats) # for spline
xx <- -9:9
plot(xx, sqrt(abs(xx)), col = "red")
lines(spline(xx, sqrt(abs(xx)), n=101), col = "pink")