Add graph references

2026-06-28 13:49:01 +01:00
parent 0a9807e448
commit a11edf0c53
2578 changed files with 868045 additions and 0 deletions
@@ -0,0 +1,109 @@
+/*
+   igraph library.
+   Copyright (C) 2024  The igraph development team <igraph@igraph.org>
+
+   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, see <https://www.gnu.org/licenses/>.
+*/
+
+#include <igraph.h>
+
+#include "bench.h"
+
+void run_bench(const igraph_t *graph, const igraph_vector_t *weights,
+               const char *name, int rep) {
+    igraph_vector_int_t membership;
+    igraph_vector_t vertex_weight;
+    igraph_int_t vcount = igraph_vcount(graph);
+    igraph_int_t ecount = igraph_ecount(graph);
+    char msg[256], msg2[128];
+
+    igraph_vector_int_init(&membership, vcount);
+    igraph_vector_init(&vertex_weight, vcount);
+
+    igraph_strength(graph, &vertex_weight, igraph_vss_all(), IGRAPH_ALL, IGRAPH_LOOPS, weights);
+
+    snprintf(msg2, sizeof(msg2) / sizeof(msg2[0]),
+             "%s, vcount=%" IGRAPH_PRId ", ecount=%" IGRAPH_PRId ", %s, %dx",
+             name, vcount, ecount, weights == NULL ? "unweighted" : "weighted",
+             rep);
+
+
+    snprintf(msg, sizeof(msg) / sizeof(msg[0]), "1 Louvain, %s", msg2);
+    BENCH(msg, REPEAT(igraph_community_multilevel(graph, weights, 1.0, &membership, NULL, NULL), rep));
+
+    snprintf(msg, sizeof(msg) / sizeof(msg[0]), "2 Leiden , %s", msg2);
+    BENCH(msg, REPEAT(igraph_community_leiden(graph, weights, &vertex_weight, NULL, 1.0 / igraph_vector_sum(weights), 0.01, false, 1, &membership, NULL, NULL), rep));
+
+    printf("\n");
+
+    igraph_vector_destroy(&vertex_weight);
+    igraph_vector_int_destroy(&membership);
+}
+
+void rand_weights(const igraph_t *graph, igraph_vector_t *weights) {
+    igraph_int_t ecount = igraph_ecount(graph);
+    igraph_vector_resize(weights, ecount);
+    for (igraph_int_t i=0; i < ecount; i++) {
+        VECTOR(*weights)[i] = RNG_UNIF01();
+    }
+}
+
+int main(void) {
+    igraph_t graph;
+    igraph_vector_t weights;
+
+    igraph_rng_seed(igraph_rng_default(), 137);
+    BENCH_INIT();
+
+    igraph_vector_init(&weights, 0);
+
+    igraph_erdos_renyi_game_gnm(&graph, 100, 500, false, false, false);
+    rand_weights(&graph, &weights);
+    run_bench(&graph, &weights, "G(n,m)", 1000);
+    igraph_destroy(&graph);
+
+    igraph_erdos_renyi_game_gnm(&graph, 1000, 5000, false, false, false);
+    rand_weights(&graph, &weights);
+    run_bench(&graph, &weights, "G(n,m)", 100);
+    igraph_destroy(&graph);
+
+    igraph_erdos_renyi_game_gnm(&graph, 1000, 50000, false, false, false);
+    rand_weights(&graph, &weights);
+    run_bench(&graph, &weights, "G(n,m)", 10);
+    igraph_destroy(&graph);
+
+    igraph_erdos_renyi_game_gnm(&graph, 10000, 50000, false, false, false);
+    rand_weights(&graph, &weights);
+    run_bench(&graph, &weights, "G(n,m)", 10);
+    igraph_destroy(&graph);
+
+    igraph_erdos_renyi_game_gnm(&graph, 100000, 500000, false, false, false);
+    rand_weights(&graph, &weights);
+    run_bench(&graph, &weights, "G(n,m)", 1);
+    igraph_destroy(&graph);
+
+    igraph_forest_fire_game(&graph, 1000, 0.2, 1, 2, false);
+    rand_weights(&graph, &weights);
+    run_bench(&graph, &weights, "forest fire", 100);
+    igraph_destroy(&graph);
+
+    igraph_barabasi_game(&graph, 1000, 1, 5, NULL, true, 0, false, IGRAPH_BARABASI_PSUMTREE, NULL);
+    rand_weights(&graph, &weights);
+    run_bench(&graph, &weights, "PA", 100);
+    igraph_destroy(&graph);
+
+    igraph_vector_destroy(&weights);
+
+    return 0;
+}