roots([1,1,1,1]) fails to give a proper answer. Instead it writes "error: dgeev failed to converge". It might some problem with libraries or with this particular version of octave (it happens in version 2.1.73 and in 2.1.73-r2) I suppose. On other computer with version 2.1.71 everything goes smoothly. Reproducible: Always Steps to Reproduce: 1. roots([1,1,1,1]); 2. 3. Actual Results: error: dgeev failed to converge error: evaluating assignment expression near line 65, column 9 error: evaluating if command near line 62, column 5 error: evaluating if command near line 59, column 3 error: called from `roots' in file `/usr/share/octave/2.1.73/m/polynomial/roots.m' Expected Results: ans = -1.00000 + 0.00000i 0.00000 + 1.00000i 0.00000 - 1.00000i emerge info: Gentoo Base System version 1.12.4 *** Deprecated use of action 'info', use '--info' instead Portage 2.1.1-r2 (default-linux/x86/2006.1, gcc-4.1.1, glibc-2.4-r3, 2.6.17-gentoo-r7 i686) ================================================================= System uname: 2.6.17-gentoo-r7 i686 Intel(R) Pentium(R) M processor 1.70GHz Last Sync: Fri, 05 Jan 2007 10:20:01 +0000 app-admin/eselect-compiler: [Not Present] dev-java/java-config: 1.3.5-r1, 2.0.27-r1 dev-lang/python: 2.4.3-r1 dev-python/pycrypto: 2.0.1-r5 dev-util/ccache: [Not Present] dev-util/confcache: [Not Present] sys-apps/sandbox: 1.2.17 sys-devel/autoconf: 2.13, 2.61 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10 sys-devel/binutils: 2.16.1-r3 sys-devel/gcc-config: 1.3.13-r3 sys-devel/libtool: 1.5.22 virtual/os-headers: 2.6.11-r5 ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CBUILD="i686-pc-linux-gnu" CFLAGS="-O2 -march=pentium-m -pipe" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/share/X11/xkb /usr/share/config /usr/share/texmf/dvipdfm/config/ /usr/share/texmf/dvips/config/ /usr/share/texmf/tex/generic/config/ /usr/share/texmf/tex/platex/config/ /usr/share/texmf/xdvi/" CONFIG_PROTECT_MASK="/etc/env.d /etc/env.d/java/ /etc/gconf /etc/java-config/vms/ /etc/revdep-rebuild /etc/terminfo" CXXFLAGS="-O2 -march=pentium-m -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig distlocks metadata-transfer sandbox sfperms strict" GENTOO_MIRRORS=" http://src.gentoo.pl http://gentoo.prz.rzeszow.pl http://gentoo.zie.pg.gda.pl " LINGUAS="pl de en_GB fr" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --delete-after --stats --timeout=180 --exclude='/distfiles' --exclude='/local' --exclude='/packages'" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage" USE="x86 X alsa alsa_cards_ali5451 alsa_cards_als4000 alsa_cards_atiixp alsa_cards_atiixp-modem alsa_cards_bt87x alsa_cards_ca0106 alsa_cards_cmipci alsa_cards_emu10k1x alsa_cards_ens1370 alsa_cards_ens1371 alsa_cards_es1938 alsa_cards_es1968 alsa_cards_fm801 alsa_cards_hda-intel alsa_cards_intel8x0 alsa_cards_intel8x0m alsa_cards_maestro3 alsa_cards_trident alsa_cards_usb-audio alsa_cards_via82xx alsa_cards_via82xx-modem alsa_cards_ymfpci alsa_pcm_plugins_adpcm alsa_pcm_plugins_alaw alsa_pcm_plugins_asym alsa_pcm_plugins_copy alsa_pcm_plugins_dmix alsa_pcm_plugins_dshare alsa_pcm_plugins_dsnoop alsa_pcm_plugins_empty alsa_pcm_plugins_extplug alsa_pcm_plugins_file alsa_pcm_plugins_hooks alsa_pcm_plugins_iec958 alsa_pcm_plugins_ioplug alsa_pcm_plugins_ladspa alsa_pcm_plugins_lfloat alsa_pcm_plugins_linear alsa_pcm_plugins_meter alsa_pcm_plugins_mulaw alsa_pcm_plugins_multi alsa_pcm_plugins_null alsa_pcm_plugins_plug alsa_pcm_plugins_rate alsa_pcm_plugins_route alsa_pcm_plugins_share alsa_pcm_plugins_shm alsa_pcm_plugins_softvol apache2 apm bash-completion berkdb bitmap-fonts bzip2 cdparanoia cdr cli cracklib crypt cups dlloader dri dvd elibc_glibc firefox fortran gdbm gnome gpm graphviz gtk gtk2 hal hdaps iconv input_devices_evdev input_devices_keyboard input_devices_mouse ipv6 isdnlog java javascript jpeg kernel_linux libg++ linguas_de linguas_en_GB linguas_fr linguas_pl md5sum mozilla mp3 mysql ncurses nls nptl nptlonly nsplugin opengl pam pcmcia pcre perl php ppds pppd python readline reflection session spl sse sse2 ssl tcpd truetype truetype-fonts type1-fonts udev unicode userland_GNU video_cards_fglrx xml xorg yahoo zlib" Unset: CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, LDFLAGS, PORTAGE_RSYNC_EXTRA_OPTS, PORTDIR_OVERLAY
Hi Maciej, Thanks for your report! I am guessing that you don't have any blas and lapack installed on your machine. In this case octave will use its internal versions which are broken and result in the errors that you've been observing. If this is the case you have two options. Either emerge any of virtual/lapack (e.g. lapack-reference or lapack-atlas, the former compiles much faster but is not as optimized) and then re-emerge octave-2.1.732 or emerge octave-2.1.73-r2 which will force you to install virtual/lapack for just that reason. Best, Markus
Hi Maciej, Any news on this? Thanks, Markus
I am closing this one as fixed since it should not happen any more in octave-2.1.73-r2 for the reasons given in comment #1. Please re-open if you still have similar problems with -r2. Thanks, Markus
