Re: c2d

[Doug Stewart]

Gino Francisco Alania Hurtado wrote:
> octave:4> [Npz,Dpz]=c2d(Nu,De,'zoh',T)
> usage: dsys=c2d(sys[,T])
> error: evaluating if command near line 104, column 3
> error: called from `c2d' in file 
> `/home/nitcom/gino/octave/share/octave/2.1.73/m/control/system/c2d.m'
>
>
> Doug Stewart escribió:
> > Gino Francisco Alania Hurtado wrote:
> > > I need help me ,  used command c2d
> > >
> > > octave:6> T=0.05;
> > > octave:7> Nu=200;
> > > octave:8> De=[1 30 200];
> > > octave:9> [Npz,Dpz]=c2d(Nu,De,T,'zoh')
> > >   
> >
> > [Npz,Dpz]=c2d(Nu,De,'zoh',T)
> >
> >
> >
> > > usage: dsys=c2d(sys[,T])
> > > error: evaluating if command near line 104, column 3
> > >
> > > as the function would have to be used c2d?
> > >
> > > _______________________________________________
> > > Help-octave mailing list
> > > address@hidden
> > > https://www.cae.wisc.edu/mailman/listinfo/help-octave
> > >
> > >   
Sorry I should have look at it a little closer!!

Here is what you want    I think

T=0.05;
Nu=200;
De=[1 30 200];
sys1=tf2sys(Nu,De);
sysout(sys1)
sys2=c2d(sys1,T);
sysout(sys2)
[Npz Dpz] = sys2tf(sys2)
roots(Npz)
roots(Dpz)

Now depending on what version of Octave you have  you might want:


T=0.05;
Nu=200;
De=[1 30 200];
sys1=tf(Nu,De);
sysout(sys1)
sys2=c2d(sys1,T);
sysout(sys2)
[Npz Dpz] = sys2tf(sys2)
roots(Npz)
roots(Dpz)