Scilab Function

erf - The error function.

### Calling Sequence

  `y = erf(x)`

### Parameters

- `x` : real vector or matrix
- `y` : real vector or matrix (of same size than x)

### Description

`erf` computes the error function:

                        /x     2
                2       |    -t
         y = -------    |   e    dt
             sqrt(pi)  /0

### Examples

    deff('y=f(t)','y=exp(-t^2)');
    erf(0.5)-2/sqrt(%pi)*intg(0,0.5,f)

### See Also

`erfc` , `erfcx` , `calerf` , `cdfnor` ,

### Author

W. J. Cody (code from Netlib (specfun))