How do I uses the information from this code in the optimization tool?

 clear all;
 clc;

 Fi=1000;

 Se= 50;
Su= 450;

 C= 2/3;
 nf=[];
 Pmax= 3662.5;
 Pmin= 1000;

 D=2:01:6;
 for k = 1:numel(D)
    A= 0.25*pi*(D(k))^2;
      siga= ((C*Pmax+Fi)-(C*Pmin+Fi))/2*A;
      sigm= ((C*Pmax+Fi)+(C*Pmin+Fi))/2*A;
      sigi= sigm-siga;
      nf(k)= (Se*(Su-sigi))/(siga*(Su+Se));
  end
 figure(1)
 plot(D,nf)
 xlabel('D');
 ylabel('nf');

[Liam Swift]

Trying to find the nf from the code.

[Ameer Hamza]

You didn't provide a clear description of your problem. It is not easy to just look at a code and try to understand what you are trying to do.

https://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer