On Thu, 29 May 2008, Prof Brian Ripley wrote:
On Wed, 28 May 2008, someone ashamed of his real identity wrote:
[...]
There is always the same problem with theses examples :
#1
x=rnorm(10)
qqnorm(x)
identify(x)
#2
x=rnorm(10)
par(mfrow=c(2,1))
plot(x)
qqnorm(x)
identify(x)
identify does not find any points.
Correct, but it is user error. From the help for identify:
x,y: coordinates of points in a scatter plot. Alternatively, any
object which defines coordinates (a plotting structure, time
series etc: see 'xy.coords') can be given as 'x', and 'y'
left missing.
and qqnorm does not do a scatter plot of 'x'. You need something like (look
at qqnorm.default)
xx <- qnorm(ppoints(length(x)))[order(order(x))]
identify(xx, x)
(If there were missing values you would need to work harder.)
Or just
xx <- qqnorm(x)
identify(xx)
at least for the default method.
--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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