DLR_f
function [x,y,typ]=DLR_f(job,arg1,arg2)
// Copyright INRIA
x=[];y=[];typ=[]
select job
case 'plot' then
standard_draw(arg1)
case 'getinputs' then
[x,y,typ]=standard_inputs(arg1)
case 'getoutputs' then
[x,y,typ]=standard_outputs(arg1)
case 'getorigin' then
[x,y]=standard_origin(arg1)
case 'set' then
x=arg1;
graphics=arg1.graphics;exprs=graphics.exprs
model=arg1.model;
x0=model.dstate;ns=prod(size(x0));
z=poly(0,'z')
while %t do
[ok,num,den,exprs]=getvalue('Set discrete SISO transfer parameters',..
['Numerator (z)';
'Denominator (z)'],..
list('pol',1,'pol',1),exprs)
if ~ok then break,end
if degree(num)>degree(den) then
message('Transfer must be proper')
ok=%f
end
if ok then
H=cont_frm(num,den)
[A,B,C,D]=H(2:5);
graphics.exprs=exprs;
[ns1,ns1]=size(A)
if ns1<=ns then
x0=x0(1:ns1)
else
x0(ns1,1)=0
end
rpar=[A(:);
B(:);
C(:);
D(:)]
model.dstate=x0
model.rpar=rpar
if norm(D,1)<>0 then
mmm=[%t %f];
else
mmm=[%f %f];
end
if or(model.dep_ut<>mmm) then
model.dep_ut=mmm,end
x.graphics=graphics;x.model=model
break
end
end
x.model.firing=[] //compatibility
case 'define' then
x0=0;A=-1;B=1;C=1;D=0;
exprs=['1';'1+z']
model=scicos_model()
model.sim='dsslti'
model.in=1
model.out=1
model.evtin=1
model.dstate=x0(:)
model.rpar=[A(:);B(:);C(:);D(:)]
model.blocktype='d'
model.dep_ut=[%f %f]
gr_i=['xstringb(orig(1),orig(2),[''num(z)'';''den(z)''],sz(1),sz(2),''fill'')';
'xpoly([orig(1)+.1*sz(1),orig(1)+.9*sz(1)],[1,1]*(orig(2)+sz(2)/2))']
x=standard_define([2.5 2.5],model,exprs,gr_i)
end
endfunction