How should do i get rid of this error?

for i=1:length(no)
    Distance=[];
    k=0;
end
    for j=1:length(no)
       if j~=i
            sum_squ_diff=sum((stock(i).price-stock(j).price).^2);
            Distance(k,:)=[stock(j).permno, stock(i).permno, sum_squ_diff];
            k=k+1;
        end
    end

Answer 1

[Birdman]

You say that k=0 at first and then on line

Distance(k,:)=[stock(j).permno, stock(i).permno, sum_squ_diff];

you try to reach to

Distance(0,:)

This is the error. Change it.

[Walter Roberson]

Also, every iteration of

for i=1:length(no)
    Distance=[];
    k=0;
end

is doing exactly the same thing. There is no point in doing those more than once.