You appear to have a problem with the accuracy of the arithmetic on that
machine. Please run the test by hand and tell us what N and max(dd) are
when the test fails (or is it the mvftt test?)
The test is not new, but the change in random-number generator will affect
what values are tested.
On Tue, 20 May 2003, James F. Reid wrote:
> Dear all,
>
> I am trying to upgrade R-1.6.2 to R-1.7.0 on an SGI running IRIX6.5.
>
> Everything compiles but I get an error in the testing phase:
>
> [snip]
> running regression tests
> make[3]: Entering directory `/usr/local/src/R-1.7.0/tests'
> running code in 'reg-tests-1.R' ...make[3]: *** [reg-tests-1.Rout]
Error 1
> make[3]: Leaving directory `/usr/local/src/R-1.7.0/tests'
> make[2]: *** [test-Reg] Error 2
> make[2]: Leaving directory `/usr/local/src/R-1.7.0/tests'
> make[1]: *** [test-all-basics] Error 1
> make[1]: Leaving directory `/usr/local/src/R-1.7.0/tests'
> make: *** [check] Error 2
>
> this is the part in reg-tests-1.Rout.fail which fails:
>
> > ## fft
> > set.seed(123)
> > eps <- 1e-11
> > for(N in 1:130) {
> + x <- rnorm(N)
> + if(N %% 5 == 0) {
> + m5 <- matrix(x,ncol=5)
> + stopifnot(apply(m5,2,fft) == mvfft(m5))
> + }
> + dd <- Mod(1 - (f2 <- fft(fft(x), inverse=TRUE)/(x*length(x))))
> + stopifnot(dd < eps)
> + }
>
>
> Any help concerning this matter would be very much appreciated.
>
> Best regards,
> James Reid.
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
>
--
Brian D. Ripley, ripley at 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