From bug-octave-request at bevo dot che dot wisc dot edu  Thu May 27 18:38:08 1999
Subject: Bug in comparation of complex matrices
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: Stefan Pesko <pesko at frcatel dot utc dot sk>
Cc: bug-octave at bevo dot che dot wisc dot edu, Michal Kaukic <mike@frcatel.utc.sk>
Date: Thu, 27 May 1999 18:38:05 -0500 (CDT)

On 26-May-1999, Stefan Pesko <pesko at frcatel dot utc dot sk> wrote:

| I have a problem with minimum of two complex matrices 
|       x = min(a,b0
| where
| a = [1,1+0.002i]
| b = [0.002i,4]
| with
| x = [0,1]
| and not correct result
| x = [2i,1+0.002i]
| as in matlab.
| 
| Thanks
| Stefan

Please try the following patch.

Thanks,

jwe

--- src/minmax.cc~	Sun Nov  3 02:22:47 1996
+++ src/minmax.cc	Thu May 27 18:32:24 1999
 at @ -169,7 +169,7 @@
     {
       int columns_are_real_only = 1;
       for (int i = 0; i < nr; i++)
-	if (imag (a (i, j)) != 0.0 && imag (b (i, j)) != 0.0)
+	if (imag (a (i, j)) != 0.0 || imag (b (i, j)) != 0.0)
 	  {
 	    columns_are_real_only = 0;
 	    break;
 at @ -327,7 +327,7 @@
     {
       int columns_are_real_only = 1;
       for (int i = 0; i < nr; i++)
-	if (imag (a (i, j)) != 0.0 && imag (b (i, j)) != 0.0)
+	if (imag (a (i, j)) != 0.0 || imag (b (i, j)) != 0.0)
 	  {
 	    columns_are_real_only = 0;
 	    break;