PID function in octave control not working.. why?

[Abdul Rahman Riza]

Dear All,

I'm using octave 3.8.2 in debian jessie 64 bit trying to run matlab example here http://ctms.engin.umich.edu/CTMS/index.php?example=Suspension&section=ControlPID

hereunder my suspension.m files:
=============================
m1 = 2500;
m2 = 320;
k1 = 80000;
k2 = 500000;
b1 = 350;
b2 = 15020;

nump=[(m1+m2) b2 k2];
denp=[(m1*m2) (m1*(b1+b2))+(m2*b1) (m1*(k1+k2))+(m2*k1)+(b1*b2) (b1*k2)+(b2*k1) k1*k2];
G1=tf(nump,denp);

num1=[-(m1*b2) -(m1*k2) 0 0];
den1=[(m1*m2) (m1*(b1+b2))+(m2*b1) (m1*(k1+k2))+(m2*k1)+(b1*b2) (b1*k2)+(b2*k1) k1*k2];
G2=tf(num1,den1);

numf=num1;
denf=nump;
F=tf(numf,denf);

Kd = 208025;
Kp = 832100;
Ki = 624075;
C = pid(Kp,Ki,Kd);

sys_cl=F*feedback(F*G1,C);

t=0:0.05:5;
step(0.1*sys_cl,t)
title('Closed-Loop Response to 0.1-m High Step w/ PID Controller')
=================================

I already installed and load the latest octave-control package and found this error message

octave:1> pkg load control
octave:2> suspension
warning: the 'pid' function belongs to the control package from Octave Forge but
has not yet been implemented.

Please read <http://www.octave.org/missing.html> to learn how you can
contribute missing functionality.


error: 'pid' undefined near line 23 column 5
error: called from:
error:   /home/riza/Codes/Octave/suspension.m at line 23, column 3
octave:2>

then I tried to change pid function into optiPID

=============================
m1 = 2500;
m2 = 320;
k1 = 80000;
k2 = 500000;
b1 = 350;
b2 = 15020;

nump=[(m1+m2) b2 k2];
denp=[(m1*m2) (m1*(b1+b2))+(m2*b1) (m1*(k1+k2))+(m2*k1)+(b1*b2) (b1*k2)+(b2*k1) k1*k2];
G1=tf(nump,denp);

num1=[-(m1*b2) -(m1*k2) 0 0];
den1=[(m1*m2) (m1*(b1+b2))+(m2*b1) (m1*(k1+k2))+(m2*k1)+(b1*b2) (b1*k2)+(b2*k1) k1*k2];
G2=tf(num1,den1);

numf=num1;
denf=nump;
F=tf(numf,denf);

Kd = 208025;
Kp = 832100;
Ki = 624075;
C = optiPID(Kp,Ki,Kd);

sys_cl=F*feedback(F*G1,C);

t=0:0.05:5;
step(0.1*sys_cl,t)
title('Closed-Loop Response to 0.1-m High Step w/ PID Controller')
=================================

but there's another error message appears

octave:2> edit suspension.m
octave:3> suspension
error: invalid use of script /usr/share/octave/packages/control-2.8.2/optiPID.m in index _expression_
error: called from:
error:   /home/riza/Codes/Octave/suspension.m at line 23, column 3
octave:3>


Please advise how to use PID function therefore I may run matlab examples here http://ctms.engin.umich.edu/CTMS/index.php?example=Suspension&section=ControlPID

Regards,

Riza