Hi, the same graph digraph G{ 2000->2001;2000->2002; 2001->2000;2001->2002; 2002->2000;2002->2001; } tested with exactly the same commands outputs different results on my machine:

graph-tool --load test.dot --vertex-histogram="in-degree|-" # vertex histogram (in-degree): 2.0 3

graph-tool --load test.dot --distance-histogram=-# distance histogram: 1.0 6

What machine / version of graph-tool are you using? Also, I think it would be better if you can continue the discussion on the mailing list. Cheers, Andrea

You wrote:

Dear Expert,

I got your email from the Graph-tool mail list. I'm a new user of graph-tool. I just met some questions that confused me a lot:

I got the file "test.dot" which is a three vertices directed full graph. Its content is like is: digraph G{ 2000->2001;2000->2002; 2001->2000;2001->2002; 2002->2000;2002->2001; }

Question 1:

When I input the command line like this to get in-degree:

$graph-tool --load test.dot --vertex-histogram="in-degree|-"

I got the output like this: 2.0 6

Could you tell me what are the meanings of the above two values?

Question 2:

When I input the command line like this to get distance: $graph-tool --load test.dot --distance-histogram=-

I got the output like this: 1.0 12

Could you tell me what are the meanings of the above two values?

Thank you very much.

Regards, Dan