From bug-octave-request at bevo dot che dot wisc dot edu  Mon Apr 30 07:34:27 2001
Subject: center([]) fails
From: Paul Kienzle <pkienzle at kienzle dot powernet dot co dot uk>
To: bug-octave at bevo dot che dot wisc dot edu
Date: Mon, 30 Apr 2001 13:27:50 +0100


The following is a patch against 2.1.34 so that center([]) returns [].

Paul Kienzle
pkienzle at kienzle dot powernet dot co dot uk

*** scripts/ChangeLog	2001/04/30 12:19:43	1.1
--- scripts/ChangeLog	2001/04/30 12:22:33
***************
*** 1,3 ****
--- 1,7 ----
+ 2001-04-30  Paul Kienzle  <pkienzle at kienzle dot powernet dot co dot uk>
+ 
+ 	* statistics/base/center.m: accept and return empty matrix
+ 	
  2001-04-18  A. Scottedward Hodel <a dot s dot hodel at eng dot auburn dot edu>
  
  	* control/system/is_stabilizable.m: Pass a to sys2ss, not sys.
*** scripts/statistics/base/center.m	2001/04/30 12:18:16	1.1
--- scripts/statistics/base/center.m	2001/04/30 12:19:25
***************
*** 33,38 ****
--- 33,40 ----
      retval = x - mean(x);
    elseif is_matrix (x)
      retval = x - ones (rows (x), 1) * mean(x);
+   elseif isempty(x)
+     retval = x;
    else
      error ("center: x must be a vector or a matrix");
    endif



-------------------------------------------------------------
Octave is freely available under the terms of the GNU GPL.

Octave's home on the web:  http://www.octave.org
How to fund new projects:  http://www.octave.org/funding.html
Subscription information:  http://www.octave.org/archive.html
-------------------------------------------------------------