So there is very likely a bug in your system software or compiler.
There is no such problem on other x86_64 systems (including
Fedora 14 and 12, FreeBSD, Solaris and Windows).
You can debug segfaults for yourself (see 'Writing R Extensions') or
ask your vendor for support.
On Mon, 21 Feb 2011, Juergen Rose wrote:
Am Montag, den 21.02.2011, 11:11 +0100 schrieb Juergen Rose:
Hi,
with small matrices eigen works as expected:
eigen(cbind(c(1,4),c(4,7)), only.values = TRUE)
$values
[1] 9 -1
$vectors
NULL
eigen(cbind(c(1,4),c(4,7)))
$values
[1] 9 -1
$vectors
[,1] [,2]
[1,] 0.4472136 -0.8944272
[2,] 0.8944272 0.4472136
eigen(cbind(c(1,-1),c(1,-1)))
$values
[1] -3.25177e-17+1.570092e-16i -3.25177e-17-1.570092e-16i
$vectors
[,1] [,2]
[1,] 0.7071068+0i 0.7071068+0i
[2,] -0.7071068+0i -0.7071068-0i
With large(?) matrices eigen produces on several of my systems
segfaults:
data(iris)
D <- dist(iris[,-5])
str(D)
Class 'dist' atomic [1:11175] 0.539 0.51 0.648 0.141 0.616 ...
..- attr(*, "Size")= int 150
..- attr(*, "Diag")= logi FALSE
..- attr(*, "Upper")= logi FALSE
..- attr(*, "method")= chr "euclidean"
..- attr(*, "call")= language dist(x = iris[, -5])
eigen(D)
*** caught segfault ***
address (nil), cause 'unknown'
Traceback:
1: .Call("La_rs", x, only.values, PACKAGE = "base")
2: eigen(D)
All systems are Gentoo systems, i.e. R-2.12.1 and blas-atlas-3.9.23-r4
is installed by compiling the sources. Recompiling R and blas-atlas did
not solve the issue. This issue seems the reason that example(svm)
creates segfaults, too.
Any hint is appreciated.
Still some additional information:
root@moose:/root(5)# R
R version 2.12.1 (2010-12-16)
Copyright (C) 2010 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: x86_64-pc-linux-gnu (64-bit)
R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.
R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.
Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.
sessionInfo()
R version 2.12.1 (2010-12-16)
Platform: x86_64-pc-linux-gnu (64-bit)
locale:
[1] C
attached base packages:
[1] stats graphics grDevices utils datasets methods
base
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--
Brian D. Ripley, rip...@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
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