Re: [igraph] Re: Question about community detection

[Tamas Nepusz]

> I run fastgreedy function, but the result shows that the merges matrix I got 
> is all zero....
Probably it isn't. The elements of the matrix are real numbers, not integers, 
but you try to print them as integers. Cast them explicitly to an integer 
before printing:

fprintf(file2, "%ld ", (long)MATRIX(mat, i, k));

-- 
T.