# MathFun {base}

### Description

`abs(x)`

computes the absolute value of x, `sqrt(x)`

computes the (principal) square root of x, √{x}.

The naming follows the standard for computer languages such as C or Fortran.

### Usage

abs(x) sqrt(x)

### Arguments

- x
- a numeric or
`complex`

vector or array.

### Details

These are internal generic primitive 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`

.

`abs(x)`

returns an `integer`

vector when `x`

is `integer`

or `logical`

.

### S4 methods

Both are S4 generic and members of the `Math`

group generic.

### 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.

‘plotmath’ for the use of `sqrt`

in plot annotation.

### Examples

Documentation reproduced from R 3.0.2. License: GPL-2.