Computing average path length

I'm using karate.gml dataset, from two visualization software gephi and SocNetV both gives me an average path length of 2.408. I want to compute the average path length in matlab using the same dataset, but mine gives me 1.76. My matlab procedure is below:

I add the distance {d} returned by the shortestpath function {[P,d] = shortestpath(G,c,nodesize);} to an array I've declared and afterwards find the mean. Not sure what I'm doing wrong.

size = nodesize;

x = [];

for c = 1:size

[P,d] = shortestpath(G,c,nodesize);

x = [x, d];

end

answer = mean(x)

[Walter Roberson]

I would tend to think that average path length would include alternative paths, not just the shortest path.

Answer 1

[Isaac Osei Agyemang]

size = nodesize;

x = [];

for c = 1:size

      for dest=1:size

          if(c~=dest)

              [P,d] = shortestpath(G,c,dest);

               x = [x, d];

          end

      end
  answer = mean(x)

Answer 2

[KSSV]

nodesize = numnodes(G);
thesize = nodesize;
x = zeros(thesize,1);
for c = 1:size
[P,d] = shortestpath(G,c,nodesize);
x(C) = d ;
end
answer = mean(x)

[Isaac Osei Agyemang]

@KSSV, Please it still gave me 1.7647

[KSSV]

What is value of thesize?According to the above code...x should be a vector. Show us your complete code.

[Isaac Osei Agyemang]

nodesize = numnodes(G);

size = nodesize;

x = [];

for c = 1:size

[P,d] = shortestpath(G,c,nodesize);

x = [x, d];

end

answer = mean(x)

[KSSV]

YOu try the code, whic I gave. x will be an vector and answer will be a number as it is mean of x.

[Isaac Osei Agyemang]

I've tried your code, it still gives me 1.76 which the other two visualization software gephi and SocNetV gives 2.4

[KSSV]

YOu mean mean(x)?

[Isaac Osei Agyemang]

I've been able to work things out, thanks for your help.

size = nodesize;

x = [];

for c = 1:size

      for dest=1:size

          if(c~=dest)

              [P,d] = shortestpath(G,c,dest);

               x = [x, d];

          end

      end
  answer = mean(x)