From bug-octave-request at bevo dot che dot wisc dot edu Fri Jun 28 21:52:17 2002
Subject: doc for norm(A,1) should state using absolute values
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: Jskud at jskud dot com
Cc: bug-octave at bevo dot che dot wisc dot edu
Date: Fri, 28 Jun 2002 21:51:44 -0500

On  7-Jun-2002, Joseph P. Skudlarek <jskud at jskud dot com> wrote:

| Bug report for Octave 2.0.14 configured for i386-redhat-linux-gnu
| 
| Description:
| -----------
| 
| info for Octave re: norm states:
| 
|  - Function File:  norm (A, P)
|      Compute the p-norm of the matrix A.  If the second argument is
|      missing, `p = 2' is assumed.
| 
|      If A is a matrix:
| 
|     P = `1'
|           1-norm, the largest column sum of A.
| 
| but column sum uses (unstated) absolute values.
| 
| Repeat-By:
| ---------
| 
| 	In Emacs, invoke info on Octave and search for norm (eg, ",norm")
| 
| Fix:
| ---
| 
| 	It would be better to replace
| 
| 	    P = `1'
| 		  1-norm, the largest column sum of A.
| 
| 	with
| 
| 	    P = `1'
| 		  1-norm, the largest sum of the absolute values 
| 		  of the columns of A. 

I fixed it to say

  1-norm, the largest column sum of the absolute values of  at var{a} dot 

and

  Infinity norm, the largest row sum of the absolute values of  at var{a} dot 

Thanks,

jwe



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