home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
OS/2 Shareware BBS: 10 Tools
/
10-Tools.zip
/
octa21eb.zip
/
octave
/
SCRIPTS.ZIP
/
scripts.fat
/
control
/
tf2zp.m
< prev
next >
Wrap
Text File
|
1999-04-29
|
1KB
|
38 lines
# Copyright (C) 1996,1998 A. Scottedward Hodel
#
# 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, 675 Mass Ave, Cambridge, MA 02139, USA.
function [zer,pol,k] = tf2zp(num,den)
# Converts transfer functions to poles / zeros.
#
# [zer,pol,k] = tf2zp(num,den) returns the zeros and poles of the SISO system
# defined by num/den. K is a gain associated with the system zeros.
# Written by A. S. Hodel, etc.
if(nargin == 2)
if(length(den) > 1) pol = roots(den);
else pol=[]; endif
if(length(num) > 1) zer = roots(num);
else zer=[]; endif
else error("Incorrect number of input arguments");
endif
[a,b,c,d] = tf2ss(num,den);
[dum,k] = tzero(a,b,c,d);
endfunction