| abs {tutoR} | R Documentation |
These functions compute miscellaneous mathematical functions. The naming follows the standard for computer languages such as C or Fortran.
abs(x) sqrt(x)
x |
a numeric or complex vector or array. |
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.
tutoR masks offer validation of inputs received. When an input object
is not found, appropriate suggestions are given, with an option
for correcting inputs.
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.
Arithmetic for simple, log for logarithmic,
sin for trigonometric, and Special for
special mathematical functions.
require(stats) # for spline xx <- -9:9 plot(xx, sqrt(abs(xx)), col = "red") lines(spline(xx, sqrt(abs(xx)), n=101), col = "pink")