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From: | Gábor Csárdi |
Subject: | Re: [igraph] Error in using the function subcomponent( ) |
Date: | Mon, 24 Feb 2014 09:45:02 -0500 |
Hi!Thanks for your kind reply. But I still have two question about the function subcomponent( ):1. Should not the result of " subcomponent(g, 4, "all")" be the union of "subcomponent(g, 4, "in")" and "subcomponent(g, 4, "out")"?
2. The graph is a directed network with 10 vertices and 10 edges and the vertice 0 is an isolated node.
Even if 4 in the source code is 5 in the graph, the result of subcomponent(g, 4, "out") is supposed to be NULL, because there is no vertice could be reached from vertice 5 in graph.
Here is the graph:1 51 73 24 54 74 99 46 98 79 2bestXueming
From: Gábor CsárdiDate: 2014-02-23 23:42Subject: Re: [igraph] Error in using the function subcomponent( )Hi!
On Sun, Feb 23, 2014 at 9:43 AM, address@hidden <address@hidden> wrote:
Hello!I am trying to use the subcomponent() to find the in-component and out-component from a given vertice.Here is the source code and result:> g<-read.graph("input.txt", "edgelist")The "edgelist" file format is indexed from zero, so what is 4 in your file will be 5 in your graph.Gabor> subcomponent(g, 4, "in")[1] 4> subcomponent(g, 4, "out")[1] 4 3> subcomponent(g, 4, "all")[1] 4 3 10 5 7 6 8 2 9Here is the input file "input.txt" (a directed network with 10 nodes and 10 edges):1 51 73 24 54 74 99 46 98 79 2But the actual result is should be:subcomponent(g, 4, "in"): 4 6 9subcomponent(g, 4, "out"): 2 4 5 7 9subcomponent(g, 4, "all"): 2 4 5 6 7 9Why is the results computed by using the function subcomponent( ) different from the actual result?bestXueming
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