error in my code

clc

clear all

i=0;

 for h=0:0.2:3
     l=h+0.2;
     i=i+1;  
     H1(i)=h; 
     k0=0.5;
     syms x ;
     if l<=0.54
         dsigmah(i)=((k0*3/0.5)*18*(x));
         dt(i)=int(dsigmah(i),x,h,l);
         dsl(i)=(dt(i)/(200000*0.003));
         k=((0.5*(0.5-0.33))+ (11.43*dsl(i)*0.33))/((0.5-0.33)+(11.43*dsl(i)));
         k0=k;
         dsigmah(i)=((k0*3/0.5)*18*(x));
         dtc(i)=int(dsigmah(i),x,h,l);
         dg(i)=abs(dt(i)-dtc(i))
         if ((dg(i)>0.001))
             k0=k;
             dsigmah(i)=((k0*3/0.5)*18*(x));
             dt(i)=int(dsigmah(i),x,h,l);
             dsl(i)=(dt(i)/(200000*0.003));
             k=((0.5*(0.5-0.33))+ (11.43*dsl(i)*0.33))/((0.5-0.33)+(11.43*dsl(i)));
             k0=k;
             dsigmah(i)=((k0*3/0.5)*18*(x));
             dtc(i)=int(dsigmah(i),x,h,l);
             dg(i)=dt(i)-dtc(i);
         end
              end
 end

it shows that

??? Error using ==> sym.sym>notimplemented at 2621 Function 'gt' is not implemented for MuPAD symbolic objects.

Error in ==> sym.sym>sym.gt at 801 notimplemented('gt');

Error in ==> Untitled5 at 20 if ((dg(i)>0.001))

Answer 1

[Jason R]

As far as I can tell, there is no symbolic greater than comparison. Replace dg(i) with subs(dg(i)) to allow the comparison to occur.