[R] half normal probability plot in R

[Douglas Bates]

"Allison Jones" <aliljones28 at hotmail.com> writes:

> I have generated the effects in a factorial design and now want to put
> them in a half normal probability plot. Is there an easy way to do
> this in R??? I can't find the command. Thanks much -

Long ago I wrote a half-normal plot for Minitab but I have forgotten
exactly what I did.  It seems that one of the easiest approaches in R
would be to do a plot of the absolute value of the effects versus the
square root of the quantiles of a chi-square on one degree of freedom.