Re: Inverse error function (erf)?

"Vebjorn Ljosa" <vebjorn@xxxxxxxxx> writes:

> Does anybody know of a Common Lisp implementation of the inverse of
> erf, the error function?

You'll have to find an expression of this function. MathWorld
indicates a MacLaurin serie for erf^-1:

http://mathworld.wolfram.com/InverseErf.html
http://mathworld.wolfram.com/MaclaurinSeries.html

So you only need to expand the serie up to the needed precision,
(or express the general term). A good mathematical 1/2 hour exercise.

--
__Pascal Bourguignon__ http://www.informatimago.com/

In a World without Walls and Fences,
who needs Windows and Gates?
.

Relevant Pages

  • Re: Inverse error function (erf)?
    ... > erf, the error function? ... here we go again--another person for 'fre' software. ...
    (comp.lang.lisp)
  • Re: erf in Forth
    ... It turns out that the FSL has an implementation of the confluent hypergeometric function (CHF), ... The relation between the error function and the CHF is ... TESTING ERF ...
    (comp.lang.forth)
  • Re: erf in Forth
    ... version of an FSL module for erf and erfc. ... calculation of the error function and complementary error function. ...
    (comp.lang.forth)
  • Re: erf in Forth
    ... Based on the code provided by Andrew and CGM, I have compiled a draft version of an FSL module for erf and erfc. ... The word ERF1 provides a low accuracy, but fast calculation of the error function, while the words ERF and ERFC provide a high accuracy, slower calculation of the error function and complementary error function. ...
    (comp.lang.forth)
  • Re: erf in Forth
    ... version of an FSL module for erf and erfc. ... calculation of the error function and complementary error function. ...
    (comp.lang.forth)