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erf

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))

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