i am trying to execute the problem code but i am getting error in this line "Linedata(​n1+k,:)=Ca​ndidate(sw​1(k),:);"

i am trying to execute this problem code but i am getting error in it.

function f=bench_func(x)
  [ps,d]=size(x);
  %Transmission Network Expansion Planning 
  % Maximum and minimum bound of the population that to be generated is 1 and 16.  
      sw=ceil(x);
      data6Bus;
      n1=length(Linedata(:,1));
      sw1=sw;
      for k=1:length(sw1)
          Linedata(n1+k,:)=Candidate(sw1(k),:);
      end
      n_orginalLine=n1;
      n=length(Pgen);
      B=zeros(n,n);
      Nline=length(Linedata(:,1));
      %Ncand=max(Candidate(:,1));
      Xline=Linedata(:,4);
      pijmax=Linedata(:,6);
      Tap=ones(n);
      for C=1:Nline
          bline(C)=1/Xline(C);
          k=Linedata(C,2);
          m=Linedata(C,3);
          B(k,m)=B(k,m)-(bline(C));
          B(m,k)=B(k,m);
          B(k,k)=B(k,k)+(bline(C));
          B(m,m)=B(m,m)+(bline(C));
      end    
  B(1,1)=10000000;
  X=inv(B);
  delP= Pgen-Pload;
  delP=(delP');

    delta=X*(delP);
    pij=zeros(Nline,1);
    for k=1:Nline
        i=Linedata(k,2);
        j=Linedata(k,3);
        pij(k)=(delta(i)-delta(j))/Xline(k);
    end
    PIPbase=0.0;
    f=sum(Linedata(n_orginalLine+1:end,7))+30;
    pen=0;

    for i=1:length(Linedata(:,1))
        pen=pen+5000*max((abs(pij(i))-Linedata(i,6)),0);
    end

    for i=1:length(Candidate(:,1))
        [a ]=find(sw==i);
        if length(a)>3
            pen=pen+1000;
        end
    end
    f=f+pen;

error

Error in bench_func (line 112)
        Linedata(n1+k,:)=Candidate(sw1(k),:);

please help me to solve this code

[Brendan Hamm]

Well judging from the portion of your error you decided to give, the error is with line 112 of the function bench_func. Without the full error message or description of the variables being used on that line this is as much as anyone can help you.

[Muhammad Umer]

this is the complete error

   Attempted to access Candidate(-5,:); index must be a positive integer or logical.

    Error in algorithm>bench_func (line 112)
            Linedata(n1+k,:)=Candidate(sw1(k),:);

    Error in algorithm (line 60)
               Fnew=bench_func(S(i,:));

[Brendan Hamm]

So, one of the elements of sw1 has the value of -5, implying that x must have had a negative value such that ceil(x) == -5. Either this should be an invalid input to x or you are indexing in an unanticipated manner.

[Walter Roberson]

Or data6Bus is altering sw .

I make it a policy never to read minds after having been up all night, so we are going to need the source of data6Bus this time. And we are going to need to know max(x) and min(x)