Writing Code For a Function

i am Writing Code For a Function but error what is needed is control operation

also is there another way to delay the function work until after the system work for 3 sec to avoid the transition as prog wait stop the system only one time

      function D = fcn(Vo, Vin, DesiredOutPut ,Di)
      %#codegen
        if  Di == 0 
          Di = DesiredOutPut/(DesiredOutPut + Vin);
        else
          Di = D
          end
      %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
          for i=0,i<1
              prog::wait(3.0)        
              i= 2
          end
      %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
          if  Vo < DesiredOutPut
          D = Di + 0.01;
        elseif Vo > DesiredOutPut
          D = Di - 0.01;
        else
          D = Di;
        end

Answer 1

[Mischa Kim]

Shreef, replace

 prog::wait(3.0)  % unless you are using MuPAD (symbolic)

by

 pause(3)

What are you trying to do in the for-loop? At the moment, you enter the loop with i=0, set i=2 and therefore exit the loop right away, since i>1.

Answer 2

[shreef]

i used for to make it one time wait as the input changing constantly but with pause i remove for-loop still getting error

as you can see i am trying to control a sepic converter i tried pid but could not be linearized so i went to use more direct approach by using that vo=vin*D/(1-D) >> D=Vo/(Vo+Vin) so by changing D I can control Vo as Vin Change that in ideal work so i use desiredoutput input to get Dinitial and work my way up or down to get desiredoutput From Current Vo Di Must be a variable i tried using syms Di Got Error Still getting error it is my first time knowing the programing blocks i tried to search but can not controll how i write completely