From: Charilaos Skiadas <skiadas_at_hanover.edu>

Date: Fri 06 Apr 2007 - 11:50:13 GMT

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Fri Apr 06 21:54:16 2007

Date: Fri 06 Apr 2007 - 11:50:13 GMT

On Apr 6, 2007, at 7:39 AM, José Luis Aznarte M. wrote:

> Hi! Maybe this is a silly question, but I need the column rank

*> (http://en.wikipedia.org/wiki/Rank_matrix) of a matrix and R function
**> 'rank()' only gives me the ordering of the elements of my matrix.
**> How can I compute the column rank of a matrix? Is there not an R
**> equivalent to Matlab's 'rank()'?
**> I've been browsing for a time now and I can't find anything, so
**> any
**> help will be greatly appreciated. Best regards!
**>
*

Surprisingly, google searching for "r matrix rank" actually returns a
R link:

http://tolstoy.newcastle.edu.au/R/help/05/05/4000.html

I suppose the point is that in R you usually need a bit more than just the rank, so instead you want an object that contains all that info and more. Like we have the various lm objects, so to speak. They do the hard work once, and then we can ask them more particular questions.

?qr

> -- --

*> Jose Luis Aznarte M. http://decsai.ugr.es/~jlaznarte
**> Department of Computer Science and Artificial Intelligence
**> Universidad de Granada Tel. +34 - 958 - 24 04 67
**> GRANADA (Spain) Fax: +34 - 958 - 24 00 79
*

Haris Skiadas

Department of Mathematics and Computer Science
Hanover College

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Fri Apr 06 21:54:16 2007

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