>>>>> "Janusz" == Janusz Kawczak
<jkawczak@fisher.stats.uwo.ca> writes:
[You wrote to "owner-r-help@...." -- that's just me (MM);
why did you not use the mailing list ? (R-devel or R-help)]
Janusz> Hello, I am getting this 'strange' message when running
the R
Janusz> program on AIX 4.2.1. I have not had any problems with the
Janusz> compilation of the program. Does anyone have an idea due to
Janusz> what is the following error present:
Janusz> R : Copyright 1998, Robert Gentleman and Ross Ihaka Version
Janusz> 0.61.3 (May 3, 1998)
>> plot(rnorm(100),rnorm(100))
Janusz> Gpretty(NaNQ,NaNQ,5): cell=NaNQ, ndiv= -2 <=0;
Janusz> (ns,nu)=(-2147483647,2147483647); dx=NaNQ, unit=NaNQ, ismall=0.
Janusz> Gpretty(NaNQ,NaNQ,5): cell=NaNQ, ndiv= -2 <=0;
Janusz> (ns,nu)=(-2147483647,2147483647); dx=NaNQ, unit=NaNQ, ismall=0.
Janusz> Error: Length cannot be negative
Janusz> In addition to the above, I've tried the latest snapshot
Janusz> version of R; the same problem occurs.
Janusz, this *IS* a problem that I recently reported to R-devel.
Ive also access to an AIX 4.2 (older than 4.2.1 ?) with the same problem:
I've tracked the bug to
> min(1)
NaNQ
(the same for max(.) for any number, and hence for range(.) ..)
The Gpretty(.) message is a direct consequence of this broken arithmetic.
Peter Dalgaard recommended using a debugger and seeing where in the source
code things go haywire..
I haven't had time yet...
Are you also using gcc for compilation?
Could it be a gcc--AIX misconfiguration?
If you can start debugging (e.g. R --debugger gdb )
we'd be glad if you worked with a recent snapshot (0.62), since quite a few
things have changed, notably the IEEE arithmetic (Inf, -Inf and NaN).
Martin
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