> First, I was wondering if Igraph considers IGRAPH_INFINITY as zero or > as other value. IGRAPH_INFINITY is infinity, period. It is there only to provide us with a sort-of-platform-independent way to refer to infinity.
> I am working with shortest-paths matrices and I would > like the distance between two vertices that can not reach each other > to be zero. Well, you have to check all the cells in the matrix and if a cell is equal to IGRAPH_INFINITY, you have to set it to zero. > (I tryied to do "igraph_matrix_scale(matrix,1./2)" and it gave > me a zero-matrix). Theoretically it should work; there is no limitation on igraph_matrix_scale to work on integer values only. I have just tested it on my machine and it worked for me, so I guess that the error is somewhere else; for instance, in the way you print the values. Cheers, -- T. _______________________________________________ igraph-help mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/igraph-help
