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Computing average path length

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Isaac Osei Agyemang
编辑： Walter Roberson 2018-9-20
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)
  1 个评论
Walter Roberson
Walter Roberson 2018-9-20
I would tend to think that average path length would include alternative paths, not just the shortest path.

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采纳的回答

Isaac Osei Agyemang
编辑：Walter Roberson 2018-9-20
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)

更多回答（1 个）

KSSV
KSSV 2018-9-20
编辑：KSSV 2018-9-20
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)
  7 个评论
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Isaac Osei Agyemang
Isaac Osei Agyemang 2018-9-20
编辑：Walter Roberson 2018-9-20
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)

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