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))