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?
Nothing appeared as an attachment.
--
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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