[R] Computing the rank of a matrix.

apjaworski at mmm.com apjaworski at mmm.com
Fri Apr 6 17:07:06 CEST 2007

How about


or perhaps

      qr(A, LAPACK=TRUE)$rank



Andy Jaworski
Process Laboratory
3M Corporate Research Laboratory
E-mail: apjaworski at mmm.com
Tel:  (651) 733-6092
Fax:  (651) 736-3122

             "José Luis                                                    
             Aznarte M."                                                   
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                                       [R] Computing the rank of a matrix. 
             04/06/2007 06:39                                              

    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!

--                                                      --
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

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