On 3/19/2007 9:12 AM, Martin Maechler wrote:
>>>>>> "Duncan" == Duncan Murdoch <[EMAIL PROTECTED]>
>>>>>> on Mon, 19 Mar 2007 09:01:39 -0400 writes:
>
> Duncan> On 3/19/2007 6:48 AM, Martin Maechler wrote:
> >>>>>>> "BDR" == Prof Brian Ripley <[EMAIL PROTECTED]>
> >>>>>>> on Sun, 18 Mar 2007 06:51:58 +0000 (GMT) writes:
> >>
> BDR> On Sat, 17 Mar 2007, Spencer Graves wrote:
> >> >> Hi, All:
> >> >> Attached please find a symmetric, indefinite matrix for which
> >> >> 'eigen(...)$vectors' included NAs:
> >> >>> load("eigenBug.Rdata")
> >> >>> sum(is.na(eigen(eigenBug)$vectors))
> >> >> [1] 5670
> >> >>> sessioninfo()
> >> >> Error: could not find function "sessioninfo"
> >> >>> sessionInfo()
> >> >> R version 2.4.1 (2006-12-18)
> >> >> i386-pc-mingw32
> >> >>
> >> >> locale:
> >> >> LC_COLLATE=English_United States.1252;LC_CTYPE=English_United
> >> >> States.1252;LC_MONETARY=English_United
> >> >> States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252
> >> >>
> >> >> attached base packages:
> >> >> [1] "stats" "graphics" "grDevices" "utils" "datasets"
> "methods" [7]
> >> >> "base"
> >> >> Using EISPACK does NOT return NAs: > sum(is.na(eigen(eigenBug,
> >> >> EISPACK=TRUE)$vectors))
> >> >> [1] 0
> >> >>
> >> >>
> >> >> I traced the problem to the following line in 'eigen':
> >> >> z <- if (!complex.x)
> >> >> .Call("La_rs", x, only.values, PACKAGE = "base")
> >> >>
> >> >>
> >> >> Comments?
> >>
> BDR> Nothing appeared as an attachment.
> >>
> >> it was a zip file which is not among the allowed ones
> >> (.tar.gz / *.tgz would work).
> >>
> >> Spencer has also contacted me in private,
> >> so you now can use something like :
> >>
> >> F <- tempfile()
> >> download.file("ftp://stat.ethz.ch/U/maechler/R/eigenBug.Rdata";, F)
> >> load(F)
>
> Duncan> This is unrelated to Spencer's problem, but this
> Duncan> sequence failed for me.
>
> Duncan> By default it will treat the file as a text file,
> Duncan> and convert EOL markers for Windows. Adding
> Duncan> "mode='wb'" to the download.file() call is necessary.
>
> ok; Thank you, Duncan.
>
> {For me, that's yet another reason why I think it would be ``nice''
> if both load() and source() would work with general
> connections the same way as read.table(), and I could just say
>
> load("ftp://stat.ethz.ch/U/maechler/R/eigenBug.Rdata";)
> }
>
> >> str(eigenBug)# tons of dinames; get rid of them:
> >> M <- unname(eigenBug)
> >>
> >> sum(is.na(eigen(M)$vectors))
> >> # 0 (for MM, on Linux); '5670' for Spencer
>
> Duncan> I get the same as Spencer in 2.4.1, but zero in
> Duncan> R-devel, in Windows.
>
> ahh, that's good news.
>
> Maybe Spencer could install a revcent version R-devel on his
> Windows machine, and try the example?
>
>
> Duncan> I haven't tried R-patched yet: there were network
> Duncan> problems here this morning, and the build failed.
I just tried it, and it gives the error the same as R 2.4.1.
Duncan Murdoch
>
> Duncan> Duncan Murdoch
>
> >> sum(is.na(eigen(M, EISPACK=TRUE)$vectors))
> >> # 0
> >>
> >> ## Guess about what kind of BLAS/Lapack I'm using :
> >> file.info(list.files(R.home("lib"), full=TRUE))[,1:3]
> >> ## size isdir mode
> >> ## ....64-linux-inst/lib/libRblas.so 422558 FALSE 755
> >> ## ....64-linux-inst/lib/libRlapack.so 3144596 FALSE 755
> >>
> >>
> >> I.e. I don't get any NA's
> >> which shows to me that the bug is most probably in the Lapack -
> >> Version that Spencer's version of R is linked against.
> >>
> >> Martin Maechler, ETH Zurich
>
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