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Hello, I am Souradeep Chattopadhyay and I am a graduate student at Iowa State University Department of Statistics. Can anyone please explain the mathematical formulation behind the scaling matrix returned by the qda function in MASS package. I want to understand how this scaling matrix is derived from the inputs given to the qda function. Example Code The following example is using

You need to learn how to access code for nonexported methods. See ? "::" > methods(qda) [1] qda.data.frame* qda.default* qda.formula* qda.matrix* see '?methods' for accessing help and source code Shows you that the methods are not exported from the namespace. Hence you need to use the triple colon operator to see their code: > MASS:::qda Once you have the code, I

I guess the question that is being asked here is what is the scaling matrix that is being returned in the qda object. The help file on qda() says: ... scaling: for each group ?i?, ?scaling[,,i]? is an array which transforms observations so that within-groups covariance matrix is spherical. ... This is a bit ambiguous. I tried a few cases (spectral, QR decomposition, especially given that it is an

Hi there, I installed the rspec on rails plugin for a new project today and guess what -- it blows up! All by other rspec on rails projects are working fine. I updated all gems & still no joy. Any ideas how I can troubleshoot this one ? Here''s my setup: - ruby 1.8.4 (2005-12-24) [powerpc-darwin8.7.0] - Rails 1.2.5 Installed with svn: ruby script/plugin install

OK, I have managed to get software RAID 1 running on my wonderful Proliant server but now have two challenges: 1) Fresh after an OS install and reboot, the RAID array starts to do its stuff but straight away (as part of the boot messages) I am told that the second disk is 'not ready for command' and the system hangs as soon as resyncing starts. I think this is fixed by adding an hdparm

I've found discussion about this in list archives, but no final answers. Many helpfull people wrote in the past how to avoid creating DVD (install from network, install from disk, boot this way, boot that way). But, I do need DVD, no way around it. No network, no USB, no floppy, no anything. Placing files on hard drive not an option. Just a DVD-ROM. By Googling around, I found some

A friend has an old Pentium-133 laptop with 32MB of memory and a 1.3 GB hard disk that he wants to use as a web server for a very small community. Will CentOS (or any other RHEL derived distribution for that matter) install and run with acceptable performance on such a system, or will a specialized distribution like Damn Small Linux be a better choice? In this case, disk space is not a big

...lot > of configuration options. I expect it can force addition of AD domain to > username but it is not the default behaviour. > > On some DC where it uses winbind to forge users: No, sorry, I cannot understand what you mean by forge, in English this word is used for creating your own banknotes or a thing used by a blacksmith. > wbinfo -i mathias.dufresne > AD.DGFIP\mathias.dufresne:*:1000:100:Mathias > Dufresne:/home/AD.DGFIP/mathias.dufresne:/bin/false > > I use wbinfo to show you how are build my user and not "getent" command > because my PAM is not config...

I've just made (yet another) CentOS 4 installation. The install process seems to go fine, however the machine doesn't wan't to boot. The system in question has one of I2O Adaptec RAID controllers. I've configured LVM with one volume group and several volumes. If I boot into the rescue mode, all looks fine and dandy. Anaconda finds the installation, and I can access all

I want to mirror an existing 40GB data only drive using software Raid1 on my new CentOS 4 server. The existing drive is connected to a Promise Ultra 100 TX2 controller (non-raid). I have read about mdadm and understand how to create the Raid1 on /dev/mdxx devices. However I would like to know if the existing data on the orignal 40GB drive in the system will be destroyed when I create the raid with

Tripwire is probably one of must-have utilities for many system administrators. However, it is missing from almost all recent Red Hattish distributions. IMO, probably due to the fact that source compiles only on i386, and needs patches to compile almost every time new major version of gcc is released. However, in absence of good replacement, this is all we have. (IMO, other tools such as AIDE

From: Dag Wieers [mailto:dag at wieers.com] > > On Mon, 16 May 2005, Maciej Zenczykowski wrote: > > > > Well, I could, but why would you use ncftp when lftp is actually more > > > feature complete and much better overall. (ncftp is not open source > > > actually). > > > > > > If there's a good reason you might convince me to do the extra

Anyone know how centos is actually pronounced? When people I work with ask me which linux I run, I say it like the word scent - oh - s, with a sharp S on the end. How's everyone else say it? How's it supposed to be said?

Afternoon, I recently upgraded a machine to CentOS 4.0 and it has two sound cards: built-in VIA, Cmedia PCI card. The OS recognizes both and I can use the tool, system-config-soundcard to test them. However, I can't seem to get any sound out of the VIA card, but the Cmedia plays the test sound just fine. The problem is that I can't get any sound apps to use the Cmedia card,

Just a quick question, Does anybody know of a good DNS server with MySQL backend? We're currently looking at MyDNS. Has anybody had any experience with MyDNS or other MySQL driven DNS servers under heavy load? Also, can anybody recommend a good DNS benchmarking utility? Thanks for your help, Bob. Bob Pierce Systems Analyst Westman Communications Group pierceb at westmancom.com

Does someone have an example mkisofs command with arguments to create a CD from the files on the CentOS CD? Since we are building servers, all the data is on CentOS4 CD1. I plan to modify it to include a kickstart file and remove some of the things on there that I don't need. I use something like this on the Cobalt Networks servers, need mods to work on CentOS. (following on one line)

Hello all! I would like to know if is possible to use LILO as the boot loader instead of the default GRUB. My question comes because I tried to run lilo command but the message "command not found" appear. It sounds like my only boot loader option in CentOS is GRUB ??. I found lilo.conf.anaconda, but not the lilo command. From already thanks. Regards, Juan P. Espino

I have just installed centos 4 on a spare box - working great. Until now, I have been using Fedora Core3. I wish to move all of my mail, address book and bookmarks created in Thunderbird and Firefox from the Fedora system to the new Centos system. Would someone kindly point me in the right direction, I am relatively new at linux. Many thanks for any assistance. christian

What happened to selinux-policy-strict package in RHEL/CentOS? -- Aleksandar Milivojevic <amilivojevic at pbl.ca> Pollard Banknote Limited Systems Administrator 1499 Buffalo Place Tel: (204) 474-2323 ext 276 Winnipeg, MB R3T 1L7

How do I get this set up? spamassassin -D --lint shows me an error... debug: bayes: no dbs present, cannot tie DB R/O: /root/.spamassassin/bayes_toks and with no db present, it doesn't learn. Is there something simple that I'm missing? Craig