Why is 'handles.edit12' not working? (GUI)

Hi, I'm working on a GUI designed in GUIDE, I have two of them which are similar, one is working and the other is not, I'm getting the following error whenever I run it, this is the part of the code which has the error line:

% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)

global tf Q1_0 Q2_0 S1_0 S2_0 I0 X1_0 X2_0 X3_0
            tspan = [0; tf];
            x0 = [Q1_0; Q2_0; S1_0; S2_0;I0; X1_0;X2_0; X3_0];
            [t,x] = ode45(@fun,tspan,x0);
            out1=[t,x]

             axes(handles.axes1);   
             plot(t,x(:,1));
             grid on

             Insu=x(:,5)/10;
             axes(handles.axes2);   
             plot(t,Insu);
             grid on

function f= fun(t,x,handles)
    F01= 0.0097; 
  EGP0= 0.0161;
  k12=0.066;
  DG=0;
  AG=0.8;
  tmaxG=40;
  VG= 0.16;
  tmaxI=55;
  Ke=0.138;
  VI=0.12;
  Ka1=0.006;
  Ka2=0.06;
  Ka3=0.03;
  Kb1= 51.2e-4*Ka1; 
  Kb2= 8.2e-4*Ka2;  
  Kb3= 520e-4*Ka3;  
% Aux. Functions
 G=x(1)/VG;

if G>=4.5
    F01_C=F01;
else
    F01_C=F01*G/4.5;
end

if G>=9
    FR=0.003*(G-9)*VG;
else
    FR=0;
end

   UI=x(4)/tmaxI;

   UG=(DG*AG*t*exp(-t/tmaxG))/(tmaxG)^2;

   newData1=importdata(get(handles.edit12,'String'));  % LINE 284
  % newData1=importdata('datosnoembarazo.mat');
  %  uu1=getfield('newData1','insudia1');
   uu1=getfield(newData1,get(handles.edit14,'String'));

ufun = @(t) interp1(1:length(uu1), uu1, t, 'nearest', 0); 

f =  [   
        -((F01_C/VG*G)*x(1))+ x(6)*x(1) + k12*x(2) - FR + UG + EGP0*(1-x(8));  %(1)
        x(6)*x(1)-(k12+x(7))*x(2);     %(2)
        ufun(t)-(x(3)/tmaxI);                   %(3)
        (x(3)/tmaxI)-(x(4)/tmaxI);             %(4)
         UI/VI - Ke*x(5);                      %(5)
        -Ka1*x(6)+ Kb1*x(5);                   %(6)
        -Ka2*x(7)+ Kb2*x(5);                   %(7)
        -Ka3*x(8)+ Kb3*x(5);                   %(8)
        ];

The error I get:

Error using Extendido_Hovorka>fun
(line 284)
Not enough input arguments.

I have tried it with the commented lines, where I choose .mat files to work with and the code works but since this is a GUI I need to let the user choose which file/vector he wants to work with, so do you know why is it not working? The other code I talked about is basically the same, just that the equations are different from this one, thanks

Answer 1

[Walter Roberson]

Note several efficiency changes made.

% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)

      global tf Q1_0 Q2_0 S1_0 S2_0 I0 X1_0 X2_0 X3_0

      %do this outside of the objective function. If the data changes during the
      %objective function then your ODE would become inconsistent, so it is safer
      %and faster to do it before the objective function

      newData1=importdata( get(handles.edit12,'String') );
      uu1 = getfield(newData1,get(handles.edit14,'String'));
      ufun = @(t) interp1(1:length(uu1), uu1, t, 'nearest', 0); 

      tspan = [0; tf];
      x0 = [Q1_0; Q2_0; S1_0; S2_0;I0; X1_0;X2_0; X3_0];

      %the objective function needs ufun passed in
      [t,x] = ode45(@(t,x) fun(t, x, ufun), tspan, x0);

      out1=[t,x]

             axes(handles.axes1);   
             plot(t,x(:,1));
             grid on

             Insu=x(:,5)/10;
             axes(handles.axes2);   
             plot(t,Insu);
             grid on

function f= fun(t, x, ufun)

        F01= 0.0097; 
    EGP0= 0.0161;
    k12=0.066;
    DG=0;
    AG=0.8;
    tmaxG=40;
    VG= 0.16;
    tmaxI=55;
    Ke=0.138;
    VI=0.12;
    Ka1=0.006;
    Ka2=0.06;
    Ka3=0.03;
    Kb1= 51.2e-4*Ka1; 
    Kb2= 8.2e-4*Ka2;  
    Kb3= 520e-4*Ka3;  
  % Aux. Functions
   G=x(1)/VG;

if G>=4.5
    F01_C=F01;
else
    F01_C=F01*G/4.5;
end

if G>=9
    FR=0.003*(G-9)*VG;
else
    FR=0;
end

   UI=x(4)/tmaxI;

   UG=(DG*AG*t*exp(-t/tmaxG))/(tmaxG)^2;

%we no longer read in the data here and build ufun here; ufun is
%now passed in

f =  [   
        -((F01_C/VG*G)*x(1))+ x(6)*x(1) + k12*x(2) - FR + UG + EGP0*(1-x(8));  %(1)
        x(6)*x(1)-(k12+x(7))*x(2);             %(2)
        ufun(t)-(x(3)/tmaxI);                  %(3)
        (x(3)/tmaxI)-(x(4)/tmaxI);             %(4)
         UI/VI - Ke*x(5);                      %(5)
        -Ka1*x(6)+ Kb1*x(5);                   %(6)
        -Ka2*x(7)+ Kb2*x(5);                   %(7)
        -Ka3*x(8)+ Kb3*x(5);                   %(8)
        ];

[Annie]

Thanks a lot, Walter! I didn't know how to pass in ufun from the outside, tried it but still missed what you wrote in the ode45 parenthesis that's why I was trying to writing it inside... But now it works, thanks (: