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## Re: [igraph] Re: network neighborhood

**From**: |
Gábor Csárdi |

**Subject**: |
Re: [igraph] Re: network neighborhood |

**Date**: |
Mon, 4 Oct 2010 10:25:53 +0200 |

On Mon, Oct 4, 2010 at 8:35 AM, anupam sinha <address@hidden> wrote:
>* Hi Gabor,*
>* Thanks a lot for your reply. The program is working fine*
>* but I am unable to understand the output.Suppose one has following edgelist*
>* file of an undirected network:*
>
>* A - B*
>* A - C*
>* A - D*
>* C - E*
>* C - F*
>
>* Now if I run graph.neighborhood on this file shouldn't I get two subgraphs*
>
>* A-B and A-C*
>* A-C C-E*
>* A-D C-F*
You get as many graphs, as many vertices in the graph (if you don't
use 'nodes' argument at least):
>* g <- graph.formula(A-B:C:D, C-E:F)*
>* graph.neighborhood(g, order=1)*
[[1]]
Vertices: 4
Edges: 3
Directed: FALSE
Edges:
[1] 'A' -- 'B'
[2] 'A' -- 'C'
[3] 'A' -- 'D'
[[2]]
Vertices: 2
Edges: 1
Directed: FALSE
Edges:
e
e [1] 'A' -- 'B'
[[3]]
Vertices: 4
Edges: 3
Directed: FALSE
Edges:
[1] 'A' -- 'C'
[2] 'C' -- 'E'
[3] 'C' -- 'F'
[[4]]
Vertices: 2
Edges: 1
Directed: FALSE
Edges:
e
e [1] 'A' -- 'D'
[[5]]
Vertices: 2
Edges: 1
Directed: FALSE
Edges:
e
e [1] 'C' -- 'E'
[[6]]
Vertices: 2
Edges: 1
Directed: FALSE
Edges:
e
e [1] 'C' -- 'F'
>* One more thing is that I am unable to send any attachments to the*
>* igraph-help mail group . The mail simply bounces back. Thanks in advance for*
>* any suggestions.*
The reason for this should be in the email you get back. Maybe the
attachment is too big. Attachments are allowed, AFAIK.
Best,
Gabor
>* Regards,*
>
>* Anupam*
>
[...]
--
Gabor Csardi <address@hidden> UNIL DGM