From bug-octave-request at bevo dot che dot wisc dot edu  Fri Jul 21 15:57:23 2000
Subject: str2mat does not accept []
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: pkienzle at kienzle dot powernet dot co dot uk (Paul Kienzle)
Cc: bug-octave at bevo dot che dot wisc dot edu
Date: Fri, 21 Jul 2000 15:57:24 -0500 (CDT)

On  9-Jun-2000, Paul Kienzle <pkienzle at kienzle dot powernet dot co dot uk> wrote:

| To: bug-octave at bevo dot che dot wisc dot edu
| Cc: pkienzle
| Subject: str2mat does not accept []
| 
| Bug report for Octave 2.0.13 configured for i386-pc-linux-gnu
| 
| Description:
| -----------
| 
| I'm trying to build a matrix of strings piecemeal using something like:
| 	x=[];
| 	while !feof(file)
| 	   str = fscanf(file,"%s");
| 	   str2mat(x,str);
| 	endwhile
| but str2mat does not accept [] as an empty string matrix.

I'm not sure that I would call this a bug, since `[]' is an empty
matrix, not a string.

If you initialize x to be the empty string (x = "" instead of x = []),
then I think it should work.

jwe

| I don't know what matlab behaviour is in this instance.
| 
| Repeat-By:
| ---------
| 
| 
| Fix:
| ---
| 
| diff -c str2mat.m-2.1.28 str2mat
| *** str2mat.m-2.1.28	Thu Jun  8 23:18:13 2000
| --- str2mat.m	Thu Jun  8 23:26:52 2000
| ***************
| *** 49,64 ****
|       s = va_arg ();
|       if (isstr (s))
|         [nr(k), nc(k)] = size (s);
| !     else
|         error ("str2mat: all arguments must be strings");
|       endif
|     endfor
| - 
| -   tmp = find (nr == 0);
| - 
| -   if (! isempty (tmp))
| -     nr(tmp) = 1;
| -   endif
|   
|     retval_nr = sum (nr);
|     retval_nc = max (nc);
| --- 49,61 ----
|       s = va_arg ();
|       if (isstr (s))
|         [nr(k), nc(k)] = size (s);
| !       if (nr(k) == 0)
| ! 	nr(k) = 1;
| !       endif
| !     elseif (!isempty (s))
|         error ("str2mat: all arguments must be strings");
|       endif
|     endfor
|   
|     retval_nr = sum (nr);
|     retval_nc = max (nc);



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