Hi,
I m using Gplab to find a structure model using the input data and the output data of the model.
In the model there is a block that rappresent a Transfert function = 10/(s+10).
My problem is that i don t know how specify this block in the setfunction because with the function zp2tf the program returns an error.
This is the code in matlab:

clear all;
close all;
load input.txt;
load output.txt;

p=resetparams;
p=setoperators(p,'crossover',2,2,'mutation',1,1);
p=setfunctions(p,'plus',2,'minus',2,'mydivide',2,'mydivide',2,'mypower',2,'zp2tf',3);
p.minprob=0;
p=setterminals(p);

p.calcfitness='regfitness';
p.datafilex='input.txt';
p.datafiley='output.txt';
p.sampling='tournament';
p.calcdiversity={'uniquegen'};
p.calccomplexity=1;
p.graphics={'plotfitness','plotdiversity','plotcomplexity','plotoperators'};
p.depthnodes='2';

g=10;
pop=10;
= gplab(g,pop,p);

drawtree(b.tree);

please help me!
best regards
Giovanni.