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
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
/* -*- mode: C -*- */
/*
IGraph library.
Copyright (C) 2009-2012 Gabor Csardi <csardi.gabor@gmail.com>
334 Harvard street, 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 <math.h>
int main(void) {
igraph_t g;
igraph_real_t cent;
igraph_arpack_options_t arpack_options;
/****************************/
/* undirected star */
igraph_star(&g, 10, IGRAPH_STAR_UNDIRECTED, /*center=*/ 0);
igraph_centralization_degree(&g, /*res=*/ NULL,
/*mode=*/ IGRAPH_ALL, IGRAPH_NO_LOOPS,
¢, /*theoretical_max=*/ NULL,
/*normalized=*/ true);
if (cent != 1.0) {
fprintf(stderr, "undirected star, degree: %g\n", cent);
return 21;
}
igraph_centralization_betweenness(&g, /*res=*/ NULL,
IGRAPH_UNDIRECTED, ¢,
/*theoretical_max=*/ NULL,
/*normalized=*/ true);
if (cent != 1.0) {
fprintf(stderr, "undirected star, betweenness: %g\n", cent);
return 22;
}
igraph_centralization_closeness(&g, /*res=*/ NULL,
IGRAPH_ALL, ¢,
/*theoretical_max=*/ NULL,
/*normalized=*/ true);
if (!igraph_almost_equals(cent, 1.0, 1e-8)) {
fprintf(stderr, "undirected star, closeness: %g\n", cent);
return 23;
}
igraph_destroy(&g);
/****************************/
/* single dyad */
igraph_small(&g, /*n=*/ 10, /*directed=*/ 0,
0, 1, -1);
igraph_arpack_options_init(&arpack_options);
igraph_centralization_eigenvector_centrality(
&g,
/*vector=*/ NULL,
/*value=*/ NULL,
IGRAPH_DIRECTED,
/*scale=*/ true,
&arpack_options, ¢,
/*theoretical_max=*/ NULL,
/*normalized=*/ true);
if (!igraph_almost_equals(cent, 1.0, 1e-8)) {
fprintf(stderr, "dyad, eigenvector centrality: %g\n", cent);
return 24;
}
igraph_destroy(&g);
return 0;
}
|
