MATLAB: Plot shifting between two values in if statement

plot if statement

Hello there I have if statement contain two equations as shown in the attached picture. This algorithm have two step size values represented by c and d respectively. The algorithm will shift between these two values according to the if statement. how can I plot the shifting between c and d. Thanks in advance.
if true
 echo on
r=0;
N=500;
K=5;
num=0;
sum=0;
actual_isi=[0.05 -0.063 0.088 -0.126 -0.25 0.9047 0.25 0.126 0.038 0.088];
sigma=0.01;
delta=0.09;
deviation=0.004;
Num_of_Realizations = 1000;
mse_av=zeros(1,N-2*K);
c=delta+deviation;
d=delta-deviation
for j=1:Num_of_Realizations,
  %information sequence
  for i=1:N,
      if (rand<0.5),
          info(i)=-1;
      else
          info(i)=1;
      end;
      echo off;
  end;
  if (j==1);echo on ; end
  %The Channel Output
  y=filter(actual_isi,1,info);
  for i=1:2:N, [noise(i) noise(i+1)]=gngauss(sigma); end;
  y=y+noise;
  %Now the Equalization part follows
  estimated_c=[0 0 0 0 0 1 0 0 0 0 0]; %Initial Estimate of ISI
  e_k1=0;
  cnt = 1;  % Loop counter.
  for k=1:N-2*K,
      y_k=y(k:k+2*K);
      z_k=estimated_c*y_k.';
      e_k=info(k)-z_k; 
      n=norm(y_k);
      if(e_k>e_k1)
          estimated_c=estimated_c+(c)*e_k*y_k/n;
        elseif(e_k<=e_k1)
            estimated_c=estimated_c+(d)*e_k*y_k/n;
        end
        e_k1=e_k;  
%         estimated_c=estimated_c+delta*e_k*y_k;
        mse(k)=e_k^2;
        echo off;
    end;
    if (j==1); echo on; end
    mse_av = mse_av + mse;
    echo off;
end; 
  end
-----------------------

Best Answer

...
for k=1:N-2*K,
   ...
   if(e_k>e_k1)
     estimated_c=estimated_c+(c)*e_k*y_k/n;
     plot(k,estimated_c,'rx')
   elseif(e_k<=e_k1)
     estimated_c=estimated_c+(d)*e_k*y_k/n;
     plot(k,estimated_c,'go')
   end
   if k==1,hold on,end
   ...
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