From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>

Date: Fri 10 Sep 2004 - 05:29:57 EST

Date: Fri 10 Sep 2004 - 05:29:57 EST

One problem here is pretty() which should accept non-finite values as it
does in S. It will in 2.0.0.

It is easiest to change !is.na to is.finite, which is what some plot() methods use.

On Thu, 9 Sep 2004 epurdom@stanford.edu wrote:

> Full_Name: Elizabeth Purdom

*> Version: 1.9.1
**> OS: Windows
**> Submission from: (NULL) (171.64.102.192)
**>
**>
**> hist() fails if encounters 'Inf' value, rather than giving warning and removing.
**> Other graphics, like plot(), don't have this problem. It's actually rather
**> confusing if you are taking the log of data real valued data with a few
**> non-positive numbers. hist() works fine in this situation unless you happen to
**> have an exact 0, as oppose to just negative numbers. Then log(0)=Inf while
**> log(-1)=NA and NA values are removed by the program while Inf kills it. At least
**> a better error message would be good, because as it is, it looks like the
**> program can't handle NAs.
**>
**> > x<-seq(-5,100,by=1)
**> ##Gives error, no output
**> > hist(log(x))
**> Error in pretty(range(x), n = breaks, min.n = 1) :
**> NA/NaN/Inf in foreign function call (arg 1)
**> In addition: Warning message:
**> NaNs produced in: log(x)
**> ##Gives log() warning
**> > hist(log(x)[!is.infinite(log(x))])
**> Warning messages:
**> 1: NaNs produced in: log(x)
**> 2: NaNs produced in: log(x)
**>
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**>
**>
*

-- Brian D. Ripley, ripley@stats.ox.ac.uk 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 ______________________________________________ R-devel@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-develReceived on Fri Sep 10 05:33:38 2004

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