home *** CD-ROM | disk | FTP | other *** search
- ## Copyright (C) 1998 Auburn University. All Rights Reserved
- ##
- ## This file is part of Octave.
- ##
- ## Octave is free software; you can redistribute it and/or modify it
- ## under the terms of the GNU General Public License as published by the
- ## Free Software Foundation; either version 2, or (at your option) any
- ## later version.
- ##
- ## Octave is distributed in the hope that it will be useful, but WITHOUT
- ## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- ## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- ## for more details.
- ##
- ## You should have received a copy of the GNU General Public License
- ## along with Octave; see the file COPYING. If not, write to the Free
- ## Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA.
-
- ## usage retval = com2str(zz{,flg})
- ##
- ## convert complex number to a string
- ## zz: complex number
- ## flg: format flag
- ## 0 (default): -1, 0, 1, 1i, 1 + 0.5i
- ## 1 (for use with zpout): -1, 0, + 1, + 1i, + 1 + 0.5i
-
- function retval = com2str (zz, flg)
-
- if (nargin < 1 | nargin > 2)
- usage("com2str(zz{,flg})");
- endif
- if(nargin == 1)
- flg = 0;
- endif
-
- if( !(is_scalar(zz) & is_scalar(flg) ) )
- error("com2str: arguments must be a scalar.");
- endif
-
- if(flg != 0 & flg != 1)
- error(["Illegal flg value: ",num2str(flg)]);
- endif
-
- sgns = "+-";
- rz = real(zz);
- iz = imag(zz);
- az = abs(zz);
- if(iz == 0)
- ## strictly a real number
- switch(flg)
- case(0)
- retval = num2str(rz);
- case(1)
- retval = [ sgns(1+(rz< 0))," ", num2str(abs(rz))];
- endswitch
- elseif(rz == 0)
- ## strictly an imaginary number
- switch(flg)
- case(0)
- retval = num2str(iz);
- case(1)
- retval = [ sgns(1+(iz< 0))," ", num2str(abs(iz)),"i"];
- endswitch
- else
- ## complex number
- ## strictly an imaginary number
- switch(flg)
- case(0)
- retval = [num2str(rz)," ",com2str(i*iz,1)];
- case(1)
- retval = [ sgns(1+(rz< 0))," ", num2str(abs(rz))," ",com2str(i*iz,1)];
- endswitch
- endif
-
- endfunction
-