problem in coding of firefly algorithm

hi

i am writing a program, in which i take three variable p1,p2,p3, and their object is to reach at position "t" in the shape of swarm. means at the end of iteration all variables value will be 50. here i just write the initial stage coding of program, but i am not getting the correct response. can any body help me, i will be thankful

regards

p1=10
p2=15
p3=20
t=50

b0=1

gamab=1     %initial
gamae=10     %final

for i=1:50

      d1=t-p1
      r1=sqrt((d1)^2)

      d2=t-p2
      r2=sqrt((d2)^2)

      d3=t-p3
      r3=sqrt((d3)^2)

      gama=gamab+((gamae-gamab)*i)/50

      c=gama^r1^2
      b1=b0*exp(-c)

      d=gama^r2^2
      b2=b0*exp(-d)

      e=gama^r3^2
      b3=b0*exp(-e)

    end

Answer 1

[Walter Roberson]

If you want the value of the variables to change, then you need to assign them new values inside the loop. You make calculations based upon t and p1, p2, p3, but you never change any of those in your loop.

[Mudasir Ahmed]

sir, here is the complete code

clc
clear

p1=10;
p2=15;
p3=20;
t=50;

b0=1;

gamab=1;     %initial
gamae=1.1;     %final

alphab=0.5
alphae=0.3

for i=1:1000

      d1=t-p1;
      r1=sqrt((d1)^2);

      d2=t-p2;
      r2=sqrt((d2)^2);

      d3=t-p3;
      r3=sqrt((d3)^2);

      gama=gamab+((gamae-gamab)*i)/50;
      alpha=alphab+((alphae-alphab)*i)/50;

      c=gama^r1;
      b1=b0*exp(-c)

      d=gama^r2;
      b2=b0*exp(-d)

      e=gama^r3;
      b3=b0*exp(-e)

      A=[b1 b2 b3];
      B=[p1 p2 p3];
      J=max(A)

      [m1 n1]=size(B);
      for y=1:n1
          if A(1,y)== J;
              gbestx=B(1,y)
          else
          end
      end

      p1=p1+(b1*(gbestx-p1))+alpha*(rand-0.5)

      p2=p2+(b2*(gbestx-p2))+alpha*(rand-0.5)

      p3=p3+(b3*(gbestx-p3))+alpha*(rand-0.5)

    end

[Walter Roberson]

sqrt(d^2) is abs(d)

[Mudasir Ahmed]

sir, what about the whole program response.