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debian-user-digest Digest V2007 #2577

From: <debian-user-digest-request(at)lists.debian.org>
Date: Sun Oct 07 2007 - 16:57:52 EDT


Content-Type: text/plain

debian-user-digest Digest Volume 2007 : Issue 2577

Today's Topics: 

  Re: mdadm segfaults - failed upgrade  [ "Andrew M.A. Cater"  ]
  Re: Anyone got realtime on Lenny now  [ Nigel Henry  ]
  Re: [SOLVED] Re: stereo on mp3 playb  [ Florian Kulzer  ]
  Re: lots of invalid email trying to   [ Raquel  ]
  Re: [SOLVED] Re: stereo on mp3 playb  [ andy  ]
  Re: [SOLVED] Re: stereo on mp3 playb  [ andy  ]
  Re: aptitude configuration question   [ Daniel Burrows 

Date: Sun, 7 Oct 2007 19:09:40 +0000


From: "Andrew M.A. Cater" <amacater@galactic.demon.co.uk>
To: debian-user@lists.debian.org


Subject: Re: mdadm segfaults - failed upgrade to Lenny - drops to


        busybox/initramfs SOLVED

Message-ID: <20071007190940.GA24811@galactic.demon.co.uk>
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline


Following Martin's suggestion as to how to use grml



[Example instructions set out below for the clueless as to how to 
recover/panicked people/those who need this in a hurry from finding 
this as a desperate Google search]


Do you need help?X

grml will recognise an existing mdadm array if given



        mdadm -A /dev/md0



Mounted the drive



        mount -t ext3 /dev/md0 /mnt/



I couldn't get the chroot to work (couldn't find zsh) - so tar'red up 
the two copies (there was an old copy around) of the home directories I 
needed and used grml-network to set up the network card.



        cd /mnt/home



        tar -pcvf andyhome2.tar /home/amacater



scp copied the files across to a remote machine.


Do you need more help?X

        scp andyhome2.tar 192.168.1.102:/home/amacater/



        scp andyhome.tar 192.168.1.102:/home/amacater/



an untar for both tar files in separate directories followed by rsync 
-avz from one to the other and I had a home directory structure 
containing files from both copies.



        mkdir andyhome



        mkdir andy2home



(Copy the two tar files to their respective directories then tar -xvf 
*tar later)



        cd andyhome/amacater



        rsync -pavz ../andy2home/amacater/* .  


Can we help you?X

If I'd thought, I'd have saved all my mail by tarring up 
/var/spool/mail/amacater as a separate item - but 
there's not much I've lost.



Hope this helps someone else in a jam at some point.



All the very best,



Andy



Date: Sun, 7 Oct 2007 15:03:45 -0400


From: Wakko Warner <wakko@animx.eu.org>


To: Kelly Clowers <kelly.clowers@gmail.com>
Cc: debian-user@lists.debian.org


Subject: Re: PCIe Video and Open source 3D drivers

Message-ID: <20071007190345.GA16303@animx.eu.org>
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline


Kelly Clowers wrote:

> On 10/7/07, Wakko Warner <wakko@animx.eu.org> wrote:
> > Please keep me CC'd, I've not subscribed to the list yet.
> 
> If a card is supported, it shouldn't matter if it is AGP or PCIe, just as
> with older cards, it does not matter if they are PCI or AGP.

I know that 2D is supported.  The question was 3D.  For some time, the R300
and newer chips were 2D only and then support for 3D was available.


Can't find what you're looking for?X
> I have not really heard anything about using FireGL cards, but if they
> use the same chips as the consumer cards, I guess they should work.
> 
> http://dri.freedesktop.org/wiki/ATIRadeon is probably the best place
> to see what is supported.

I've been there, but might be out of date (I did notice the last change
date).  They list R300 and above cards as not well supported for 3D.  I don't
know if that means that it might or might not work, but the FireGL X1 seems
to be fairly well supported for what I've been doing with it (which is based
on the Radeon 9700 R300 chip).



I was looking at a V5100 or V7100 (both based on the X800 or X850 chip). 
But the question remains, is the R4xx chips supported in 3D?


> AMD recently began releasing specs for ATI cards, and is working
> with Open Source devs to create good drivers for all modern ATI
> card, but it will be a while before there are results for end users.

I read this and was quite pleased to hear it.



I appreciate your response and any help you or anyone else reading can give.


-- 
 Lab tests show that use of micro$oft causes cancer in lab animals
 Got Gas???


Date: Sun, 7 Oct 2007 21:16:48 +0200
From: Nigel Henry <cave.dnb@tiscali.fr>
To: debian-user@lists.debian.org
Subject: Re: Anyone got realtime on Lenny now that schedutils is no more?
Message-Id: <200710072116.48276.cave.dnb@tiscali.fr>
Content-Disposition: inline
Content-Type: text/plain;
  charset="iso-8859-1"
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On Saturday 06 October 2007 16:31, Nigel Henry wrote:

> On Saturday 06 October 2007 14:57, Florian Kulzer wrote:
> > On Fri, Oct 05, 2007 at 20:50:46 +0200, Nigel Henry wrote:
> > > I've got realtime working on Etch, with a realtime kernel from the
> > > musix repo, along with rtirq, and schedutils as a dependency to rtirq.
> > > Saying that, rtirq doesn't appear to be running, but the chrt tool in
> > > schedutils has worked around the problem, and I have my soundcard set
> > > up with a prio of 90, and no, or nearly no xruns. Just one every 6m
> > > 25secs, and only of 0.250 msecs.
> > >
> > > Moving on to Lenny, and after a bit of googling, schedutils appears to
> > > now be merged into util-linux. I have util-linux installed, but looki=

ng

> > > at the installed files for it in synaptic, I don't see chrt, which is
> > > one of the old schedutils tools that I need to be able to set realtime
> > > priorities for the soundcard. In Etch chrt is in /usr/bin. Looking in
> > > Lenny, it doesn't exist.
> >
> > [...]
> >
> > > So, just how can I get a realtime kernel running on Lenny now that
> > > schedutils is no longer available?
> >
> > Having taken a quick look at the dependencies, I would think that you
> > can install Sid's current version (2.13-8) of util-linux on a Lenny
> > system. This one includes /usr/bin/chrt. (The problem is that Lenny is
> > still stuck at Etch's version of util-linux, which assumes that
> > schedutils is available as a separate package.)
> >
> > --
> > Regards,            | http://users.icfo.es/Florian.Kulzer
> >           Florian

>

> Thanks for that Florian. I'd checked on Fedora 7's version of util-linux,
> and the old schedutils tools are there. The version on Lenny is 2.12r-19.
> I'll go for the later Sid version, and hope it installs ok.

>

> I'm still trying to find out why Marcos's rtirq from the musix repo is not
> being started. It appears to have something to do with, when it installs,
> it creates a sysconfig directory in /etc, and puts rtirq in that, rather
> than in /etc/default, which is where it should be. If Sid's util-linux
> installs on Lenny ok, I think I'll install rtirq, which will create an
> /etc/sysconfig directory, then make a symlink from /etc/default/rtirq
> pointing
> to /etc/sysconfig/rtirq, and see if that resolves the problem with rtirq I
> had on Etch, before I used chrt to change the priority of the soundcard to
> 90, which fixed the realtime problem on Etch.

>

> I know rtirq isn't running on Etch because sysv-rc-conf shows runlevels
> 2,3,4,and 5 unchecked, and trying to run /etc/init.d/rtirq status, just
> segfaults, as does /etc/init.d/rtirq start.

>

> I'll post back either way, as this may be usefull to someone wanting to g=

et

> realtime working on Debian.

>

> Thanks for your help.

>

> Nigel.


Update as promised.

The Sid (unstable) version of util-linux installs ok on Lenny, and I now ha=
ve=20
chrt in /usr/bin.

The  problem with the rtrirq package that I got from the Musix repo not=20
starting, is either down to a problem with the package, or it wasn't being=
=20
installed correctly on Etch, and Lenny. I ended up with a start script for=
=20
rtirq in /etc/init.d, and the same start script in /etc/sysconfig (the=20
sysconfig directory had been created during the install of rtirq). I checke=
d=20
in my Fedora 7 install, and in /etc/sysconfig the rtirq config script is ve=
ry=20
small.

=46rom a link posted on the LAU list (see below) I downloaded a tarball for=
=20
rtirq, unpacked it, deleted the start script from /etc/sysconfig, and paste=
d=20
the correct config script that was in the tarball into /etc/sysconfig, and=
=20
also renaming it, as it was named rtirq.conf, and the the start script is=20
looking for rtirq in /etc/sysconfig.
http://www.rncbc.org/jack/rtirq-20070101.tar.gz

Assuming you have one or two realtime kernels installed, the only other thi=
ng=20
necessary is to edit /etc/security/limits.conf, and add the following lines.

@audio  - rtprio  99
@audio  - nice  -10
@audio  - memlock  4000000

These lines are for the sake of jack. Open qjackctl, then settings. check t=
he=20
realtime box, and set the realtime prio to 70.

A reboot with Lenny, starting jackd in qjackctl, and I'm now getting one xr=
un=20
every 58 mins.

Problem solved, but it took a bit of time.

Nigel.



Date: Sun, 7 Oct 2007 21:06:27 +0200
From: Florian Kulzer <florian.kulzer+debian@icfo.es>
To: debian-user@lists.debian.org
Subject: Re: [SOLVED] Re: stereo on mp3 playback
Message-ID: <20071007190627.GA19233@localhost>
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline

On Sun, Oct 07, 2007 at 19:08:37 +0100, andy wrote:

[...]


> Yes, the mp3s did play in stereo before. In any event, I rebooted and while 
> the machine was shutting down, I heard a "pop" sound from the left speaker 
> and upon reboot all is well.

>

> I don't know what happened, but suspect that it was perhaps a module not 
> loading properly in the kernel.


It could have something to do with the manipulation of the mixer levels
by /etc/init.d/alsa-utils during shutdown.


> I appreciate that rebooting is not the most elegant solution, nor even the 
> most practical, so this thread will be useful to keep just in case. What 
> would I be looking for in the output of

>

> amixer | egrep '^( .*Left|[^ ])'

>

> just so that I can keep this in mind for future reference if there is a 
> recurrence?


I wanted to look at this output to check the status of all "Left"
playback channels. You should see something like this:

Simple mixer control 'Headphone',0
  Playback channels: Front Left - Front Right
  Front Left: Playback 46 [73%] [-22.50dB] [on]
Simple mixer control 'PCM',0
  Playback channels: Front Left - Front Right
  Front Left: Playback 23 [74%] [0.00dB] [on]
Simple mixer control 'Front',0
  Playback channels: Front Left - Front Right
  Front Left: Playback 46 [73%] [-22.50dB] [on]

[ This is only part of what I get on my system. ]

If you see "[off]" or "[0%]" anywhere then it is clear that there is
room for improvement.

-- 
Regards,            | http://users.icfo.es/Florian.Kulzer
          Florian   |


Don't know where to look next?X

Date: Sun, 07 Oct 2007 12:06:35 -0700
From: Daniel Burrows <dburrows@debian.org>
To: Steve Lamb <grey@dmiyu.org>
Cc: debian-user@lists.debian.org
Subject: Re: VNC install--possible dependency error?
Message-id: <20071007190635.GA13580@alpaca>
Content-type: text/plain; charset=us-ascii
Content-disposition: inline

On Fri, Oct 05, 2007 at 09:04:45AM -0700, Steve Lamb <grey@dmiyu.org> was heard to say:

> Daniel Burrows wrote:
> >   Looks like a mistake to me.  I'd think suggesting vnc-server, or maybe
> > (say) "tightvncserver | vnc-server", would be just fine.  OTOH, tightvnc
> > has protocol extensions and works better with its own server, so that
> > suggestion isn't entirely silly.
> 
>     Actually I think the whole suggests is a mistake.  The whole idea is that
> the client is to connect to a remote machine running the server.  Suggesting
> the server on the local machine does no good.


  Well, IIRC you can use VNC on a local machine to get a detachable X
session a la screen.  I don't know if this use case is common enough to
justify a Suggests, though.

  Daniel



Date: Sun, 7 Oct 2007 20:47:39 +0100
From: martin f krafft <madduck@debian.org>
To: debian-user@lists.debian.org
Subject: Re: mdadm segfaults - failed upgrade to Lenny - drops to
	busybox/initramfs SOLVED
Message-ID: <20071007194739.GA2935@lapse.madduck.net>
Content-Type: multipart/signed; micalg=pgp-sha1;
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--KsGdsel6WgEHnImy
Content-Type: text/plain; charset=us-ascii
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also sprach Andrew M.A. Cater <amacater@galactic.demon.co.uk> [2007.10.07.2=
009 +0100]:

> I couldn't get the chroot to work (couldn't find zsh) - so tar'red up=20


Next time, try

  chroot /mnt /bin/sh

--=20
 .''`.   martin f. krafft <madduck@debian.org>
: :'  :  proud Debian developer, author, administrator, and user
`. `'`   http://people.debian.org/~madduck - http://debiansystem.info
  `-  Debian - when you have better things to do than fixing systems
=20
"no woman should ever be quite accurate about her age.
 it looks so calculating."
                                                        -- oscar wilde

--KsGdsel6WgEHnImy
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--KsGdsel6WgEHnImy--



Date: Sun, 07 Oct 2007 12:50:50 -0700
From: Steve Lamb <grey@dmiyu.org>
To: debian-user@lists.debian.org
Subject: Re: VNC install--possible dependency error?
Message-ID: <4709389A.9080809@dmiyu.org>
Content-Type: multipart/signed; micalg=pgp-sha1;
 protocol="application/pgp-signature";
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--------------enig5E2BAEFE199C02521A258675
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Daniel Burrows wrote:

>   Well, IIRC you can use VNC on a local machine to get a detachable X
> session a la screen.  I don't know if this use case is common enough to=

> justify a Suggests, though.


    Huh, hadn't thought of that.  You're right.

--=20
         Steve C. Lamb         | But who decides what they dream?
       PGP Key: 1FC01004       |   And dream I do...
-------------------------------+-----------------------------------------=
----


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Date: Sun, 7 Oct 2007 12:50:28 -0700
From: Raquel <raquel@thericehouse.net>
To: debian-user@lists.debian.org
Subject: Re: lots of invalid email trying to come in
Message-Id: <20071007125028.7a2c385d.raquel@thericehouse.net>
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit

On Sun, 7 Oct 2007 13:38:59 -0400
Rick Pasotto <rick@niof.net> wrote:


> On Sun, Oct 07, 2007 at 07:36:40AM -0700, Raquel wrote:
> > On Sat, 6 Oct 2007 20:14:44 -0400
> > Rick Pasotto <rick@niof.net> wrote:
> > 
> > > Suddenly I'm getting lots of email to someuser@mywebsite.info
> > > where 'someuser' can be most anything. They're coming from
> > > different ips, some of which have no host name. ('mywebsite'
> > > is not the real name.)
> > > 
> > > What's going on? How can I stop it?
> > 
> > Welcome to the Internet.  You can't stop them from trying to get
> > in (except by taking the machine off-line).  You can only keep
> > them from getting in.
> 
> Exim was doing a very good job of keeping them from getting in.
> The reason I posted was the fact of all the *different* ips trying
> to send to invalid users at the same host within a relatively
> short period of time. Does that mean that those ips are actually
> zombies that are being used to send email? If so, should their
> owners be notified?
> 


This was exactly my point, there's little, if anything, that can be
done.  You could contact the IP address, but are you sure that's who
sent the email that didn't get into your system.  IP spoofing is
terribly easy and is done all the time.  So, your "notified owners"
may be innocent people.  Your "bounce-back" is creating a worse
problem than the mail that isn't getting into your machine.

My advice?  Ignore it and do something productive.

-- 
Raquel
============================================================
Watch out for the fellow who talks about putting things in order! 
Putting things in order always means getting other people under your
control.
  --Denis Diderot



Date: Sun, 07 Oct 2007 20:55:32 +0100
From: andy <geek_show@dsl.pipex.com>
To: Kevin Mark <kevin.mark@verizon.net>, debian-user@lists.debian.org
Subject: Re: [SOLVED] Re: stereo on mp3 playback
Message-ID: <470939B4.6050004@dsl.pipex.com>
Content-Type: multipart/alternative;
 boundary="------------070104030903010004060102"

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Kevin Mark wrote:

> On Sun, Oct 07, 2007 at 07:08:37PM +0100, andy wrote:
>   

>> Hi
>>
>> Yes, the mp3s did play in stereo before. In any event, I rebooted and while 
>> the machine was shutting down, I heard a "pop" sound from the left speaker 
>> and upon reboot all is well.
>>
>> I don't know what happened, but suspect that it was perhaps a module not 
>> loading properly in the kernel.
>>
>>     
>

> That word 'pop' awoke something. I recall that some speakers have a
> automatic volume adjustment whereby if they get a sudden loud burst,
> they stop the sound until being powered down. So maybe you have these
> kind of speakers? Are they 'powered' or hooked up to a reciever?

>

>   

They are independently powered and then plugged into the sound card 
output jack. All current runs to the right and then off to the left 
speakers.

It's worth my monitoring, and if it happens again I won't reboot but 
will try to debug it.

A

-- 

"If they can get you asking the wrong questions, they don't have to worry about the answers." - Thomas Pynchon, "Gravity's Rainbow"


--------------070104030903010004060102
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
  <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
  <title></title>
</head>
<body bgcolor="#ffffff" text="#000000">
Kevin Mark wrote:
<blockquote cite="mid20071007185955.GL18665@horacrux" type="cite">
  <pre wrap="">On Sun, Oct 07, 2007 at 07:08:37PM +0100, andy wrote:
  </pre>
  <blockquote type="cite">
    <pre wrap="">Hi

Yes, the mp3s did play in stereo before. In any event, I rebooted and while 
the machine was shutting down, I heard a "pop" sound from the left speaker 
and upon reboot all is well.

I don't know what happened, but suspect that it was perhaps a module not 
loading properly in the kernel.

    </pre>
  </blockquote>
  <pre wrap=""><!---->
That word 'pop' awoke something. I recall that some speakers have a
automatic volume adjustment whereby if they get a sudden loud burst,
they stop the sound until being powered down. So maybe you have these
kind of speakers? Are they 'powered' or hooked up to a reciever?

  </pre>
</blockquote>
They are independently powered and then plugged into the sound card
output jack. All current runs to the right and then off to the left
speakers.<br>
<br>
It's worth my monitoring, and if it happens again I won't reboot but
will try to debug it.<br>
<br>
A<br>
<br>
<pre class="moz-signature" cols="72">-- 

"If they can get you asking the wrong questions, they don't have to worry about the answers." - Thomas Pynchon, "Gravity's Rainbow"
</pre>
</body>
</html>

--------------070104030903010004060102--



Date: Sun, 07 Oct 2007 20:57:32 +0100
From: andy <geek_show@dsl.pipex.com>
To: debian-user@lists.debian.org
Subject: Re: [SOLVED] Re: stereo on mp3 playback
Message-ID: <47093A2C.7090509@dsl.pipex.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

Florian Kulzer wrote:

> On Sun, Oct 07, 2007 at 19:08:37 +0100, andy wrote:

>

> [...]

>

>   

>> Yes, the mp3s did play in stereo before. In any event, I rebooted and while 
>> the machine was shutting down, I heard a "pop" sound from the left speaker 
>> and upon reboot all is well.
>>
>> I don't know what happened, but suspect that it was perhaps a module not 
>> loading properly in the kernel.
>>     
>

> It could have something to do with the manipulation of the mixer levels
> by /etc/init.d/alsa-utils during shutdown.

>

>   

>> I appreciate that rebooting is not the most elegant solution, nor even the 
>> most practical, so this thread will be useful to keep just in case. What 
>> would I be looking for in the output of
>>
>> amixer | egrep '^( .*Left|[^ ])'
>>
>> just so that I can keep this in mind for future reference if there is a 
>> recurrence?
>>     
>

> I wanted to look at this output to check the status of all "Left"
> playback channels. You should see something like this:

>

> Simple mixer control 'Headphone',0
>   Playback channels: Front Left - Front Right
>   Front Left: Playback 46 [73%] [-22.50dB] [on]
> Simple mixer control 'PCM',0
>   Playback channels: Front Left - Front Right
>   Front Left: Playback 23 [74%] [0.00dB] [on]
> Simple mixer control 'Front',0
>   Playback channels: Front Left - Front Right
>   Front Left: Playback 46 [73%] [-22.50dB] [on]

>

> [ This is only part of what I get on my system. ]

>

> If you see "[off]" or "[0%]" anywhere then it is clear that there is
> room for improvement.

>

>   

Hi Florian

I didn't post the output because I only came across your reply once I 
had rebooted and everything was working fine again. I did run the 
command for interest and having just done so again, there are no 0% or 
"off"'s associated with the left speaker.

As I remarked to Kevin in a separate post, if this happens again I will 
attempt to debug this rather than rebooting.

Thanks for your help

A

-- 

"If they can get you asking the wrong questions, they don't have to worry about the answers." - Thomas Pynchon, "Gravity's Rainbow"



Date: Sun, 07 Oct 2007 12:43:12 -0700
From: Daniel Burrows <dburrows@debian.org>
To: Jude DaShiell <jdashiel@shellworld.net>
Cc: debian-user@lists.debian.org
Subject: Re: aptitude configuration question
Message-id: <20071007194312.GC13580@alpaca>
Content-type: text/plain; charset=us-ascii
Content-disposition: inline

On Sun, Oct 07, 2007 at 08:35:22AM -0500, Jude DaShiell <jdashiel@shellworld.net> was heard to say:

> What can I put into the .aptituderc file to adjust aptitude so the 
> recommended downloads and suggested downloads get downloaded with an 
> aptitude dist-upgrade?


  Because of the design of apt, it's only possible [0] to install Recommends
and Suggests when a package is initially installed.  The closest you
could get would be blindly install every recommendation, in which case
the program will try to re-install recommendations that you've removed
on upgrade.

  Also, you almost certainly don't want to auto-install Suggests;
all sorts of junk will end up on your system if you do.

  Daniel

  [0] for values of "possible" that don't involve abusing the library
      interface or reimplementing it.



Date: Sun, 07 Oct 2007 12:39:19 -0700
From: Daniel Burrows <dburrows@debian.org>
To: Giorgos Pallas <gpall@ccf.auth.gr>
Cc: debian Users ENG <debian-user@lists.debian.org>
Subject: Re: aptitude has other behaviour using command-line and UI
Message-id: <20071007193919.GB13580@alpaca>
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On Sun, Oct 07, 2007 at 11:29:08AM +0300, Giorgos Pallas <gpall@ccf.auth.gr> was heard to say:

> But if I start the UI, it reports:
> 
> #Broken: 89   Will free 344MB of disk space   DL Size: 14.0 MB
> 
> and
> [1(1)/...] Suggest 2 installs, 28 removals, 47 keeps
> e: Examine   !: Apply   .: Next
> 
> 
> Does anyone has an idea about what is happening?  


  The visual UI tries to remember what you were doing last time and
restore the state of the program.  Occasionally something will go wrong,
or it'll save a state that you didn't want it to save.  It sounds like
that's what happened to you.

  You can clear the state by running "aptitude keep-all" or choosing
"Cancel pending actions" from the Actions menu.

  Daniel


Confused? Frustrated?X

Date: Sun, 07 Oct 2007 19:59:06 GMT
From: "George N. White III" <aa056@chebucto.ns.ca>
To: debian-user@lists.debian.org
Subject: Re: Math Package to Solve Linear Equations?
Message-ID: <alpine.LFD.0.9999.0710071647180.8793@cerberus.cwmannwn>
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed

On Sat, 6 Oct 2007, Thomas H. George wrote:


> I'm feeling stupid.  I used to have a math package which inverted 
> matrices to solve systems of linear equations - i.e. enter the matrix 
> and the y values and the program inverts the matrix and reports the x 
> values.  I know how to do it manually but it is laborious for large 
> matrices.  Perhaps Openoffice.calc/solver does this but it is not clear 
> to me how to enter data for solver to do this.  apt-cache search matrix 
> |grep inversion doesn't turn up anything.


There are better ways to solve systems of linear equations than by
inverting matrices -- please consult a numerical analysis text.


> Would someone please beat me over the head and point me to a simple 
> package to do this job?


There are several "matrix languages" that support array data and provide 
matric inversion as well as solvers, including: Matlab/octave, IDL/gdl, 
S+/R.  Of these, the S+/R language is the most modern.  It is written by 
and for statisticians, but offers much the same linear algebra 
capabilities found in Matlab/octave and IDL/gdl.  If you aren't already 
familiar with Matlab or IDL then I recommend R.  The documentation is 
excellent and it is very widely used.

-- 
George N. White III <aa056@chebucto.ns.ca>

End of debian-user-digest Digest V2007 Issue #2577
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Received on Sun Oct  7 16:58:02 2007

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