1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/* -*- mode: C++ -*- */
/*
IGraph library.
Copyright (C) 2011-2012 Gabor Csardi <csardi.gabor@gmail.com>
334 Harvard st, Cambridge MA, 02139 USA
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include <igraph.h>
#include <stdio.h>
int main() {
igraph_t graph;
igraph_t full, tree;
igraph_hrg_t hrg;
igraph_t dendrogram;
// int i, j;
// igraph_vector_t neis;
igraph_rng_seed(igraph_rng_default(), 42);
// We need attributes
igraph_i_set_attribute_table(&igraph_cattribute_table);
igraph_full(&full, 10, /*directed=*/ 0, /*loops=*/ 0);
igraph_tree(&tree, 15, /*children=*/ 2, /*type=*/ IGRAPH_TREE_UNDIRECTED);
igraph_disjoint_union(&graph, &full, &tree);
igraph_add_edge(&graph, 0, 10);
igraph_destroy(&full);
igraph_destroy(&tree);
// Fit
igraph_hrg_init(&hrg, igraph_vcount(&graph));
igraph_hrg_fit(&graph, &hrg, /*start=*/ 0, /*steps=*/ 0);
// Create a graph from it
igraph_hrg_dendrogram(&dendrogram, &hrg);
// Print the tree, with labels
// igraph_vector_init(&neis, 0);
// for (i=0; i<igraph_vcount(&graph)-1; i++) {
// printf("Vertex # %2i, ", (int) (i+igraph_vcount(&graph)));
// igraph_neighbors(&dendrogram, &neis, i+igraph_vcount(&graph), IGRAPH_OUT);
// printf("left: # %2i, right: # %2i, ", (int) VECTOR(neis)[0],
// (int) VECTOR(neis)[1]);
// printf("prob: %6.2g\n",
// VAN(&dendrogram, "probability", i+igraph_vcount(&graph)));
// }
// igraph_vector_destroy(&neis);
igraph_destroy(&dendrogram);
igraph_hrg_destroy(&hrg);
igraph_destroy(&graph);
return 0;
}
|
