Re: [R] R equivalent of erfcinv in matlab

From: Ben Bolker <bolker_at_ufl.edu>
Date: Mon, 14 Apr 2008 00:59:54 +0000 (UTC)

 <Bill.Venables <at> csiro.au> writes:

>
> At a guess ...
>
> > erfc <- function(x) 2 * pnorm(x * sqrt(2), lower = FALSE)
> > erfcinv <- function(x) qnorm(x/2, lower = FALSE)/sqrt(2)
> > erfc(0.3)
> [1] 0.6713732
> > erfcinv(erfc(0.3))
> [1] 0.3
> >
>
> It may not hurt to include these wrappers in R for matlab refugees.
> They seem to be coming thick and fast these days.
>

  There's a page on the wiki about matlab to R (actually I think it's titled "Octave to R" -- this could go on there whether or not it gets into base R. I would put it on myself, right now, but the wiki appears to be down?

 ping wiki.r-project.org
PING econum.umh.ac.be (193.190.194.5) 56(84) bytes of data.

  Ben Bolker



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