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 +1,152 @@
+/*
+   igraph library.
+   Copyright (C) 2020-2022  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 "test_utilities.h"
+
+int test_graph(const char* name, const igraph_t* graph, const igraph_real_t* weights_array) {
+    igraph_real_t eff;
+    igraph_vector_t eff_vec;
+
+    printf("###### Testing graph: %s ######\n\n", name);
+
+    igraph_vector_init(&eff_vec, 0);
+
+    if (weights_array) {
+        printf("UNWEIGHTED CASE:\n\n");
+    }
+
+    igraph_global_efficiency(graph, NULL, &eff, IGRAPH_UNDIRECTED);
+    printf("Global efficiency, undirected: %f\n", eff);
+
+    igraph_global_efficiency(graph, NULL, &eff, IGRAPH_DIRECTED);
+    printf("Global efficiency, directed: %f\n", eff);
+
+    igraph_average_local_efficiency(graph, NULL, &eff, IGRAPH_UNDIRECTED, IGRAPH_ALL);
+    printf("Average local efficiency, undirected: %f\n", eff);
+
+    igraph_average_local_efficiency(graph, NULL, &eff, IGRAPH_DIRECTED, IGRAPH_ALL);
+    printf("Average local efficiency, directed, all neighbors: %f\n", eff);
+
+    igraph_average_local_efficiency(graph, NULL, &eff, IGRAPH_DIRECTED, IGRAPH_IN);
+    printf("Average local efficiency, directed, in-neighbors: %f\n", eff);
+
+    igraph_average_local_efficiency(graph, NULL, &eff, IGRAPH_DIRECTED, IGRAPH_OUT);
+    printf("Average local efficiency, directed, out-neighbors: %f\n", eff);
+
+    printf("\nLocal efficiency, undirected:\n");
+    igraph_local_efficiency(graph, NULL, &eff_vec, igraph_vss_all(), IGRAPH_UNDIRECTED, IGRAPH_ALL);
+    print_vector(&eff_vec);
+
+    printf("\nLocal efficiency, directed, all neighbors:\n");
+    igraph_local_efficiency(graph, NULL, &eff_vec, igraph_vss_all(), IGRAPH_DIRECTED, IGRAPH_ALL);
+    print_vector(&eff_vec);
+
+    printf("\nLocal efficiency, directed, in-neighbors:\n");
+    igraph_local_efficiency(graph, NULL, &eff_vec, igraph_vss_all(), IGRAPH_DIRECTED, IGRAPH_IN);
+    print_vector(&eff_vec);
+
+    printf("\nLocal efficiency, directed, out-neighbors:\n");
+    igraph_local_efficiency(graph, NULL, &eff_vec, igraph_vss_all(), IGRAPH_DIRECTED, IGRAPH_OUT);
+    print_vector(&eff_vec);
+
+    if (weights_array) {
+        const igraph_vector_t weights = igraph_vector_view(weights_array, igraph_ecount(graph));
+        printf("\nWEIGHTED CASE:\n\n");
+
+        igraph_global_efficiency(graph, &weights, &eff, IGRAPH_UNDIRECTED);
+        printf("Global efficiency, undirected: %f\n", eff);
+
+        igraph_global_efficiency(graph, &weights, &eff, IGRAPH_DIRECTED);
+        printf("Global efficiency, directed: %f\n", eff);
+
+        igraph_average_local_efficiency(graph, &weights, &eff, IGRAPH_UNDIRECTED, IGRAPH_ALL);
+        printf("Average local efficiency, undirected: %f\n", eff);
+
+        igraph_average_local_efficiency(graph, &weights, &eff, IGRAPH_DIRECTED, IGRAPH_ALL);
+        printf("Average local efficiency, directed, all neighbors: %f\n", eff);
+
+        igraph_average_local_efficiency(graph, &weights, &eff, IGRAPH_DIRECTED, IGRAPH_IN);
+        printf("Average local efficiency, directed, in-neighbors: %f\n", eff);
+
+        igraph_average_local_efficiency(graph, &weights, &eff, IGRAPH_DIRECTED, IGRAPH_OUT);
+        printf("Average local efficiency, directed, out-neighbors: %f\n", eff);
+
+        printf("\nLocal efficiency, undirected:\n");
+        igraph_local_efficiency(graph, &weights, &eff_vec, igraph_vss_all(), IGRAPH_UNDIRECTED, IGRAPH_ALL);
+        print_vector(&eff_vec);
+
+        printf("\nLocal efficiency, directed, all neighbors:\n");
+        igraph_local_efficiency(graph, &weights, &eff_vec, igraph_vss_all(), IGRAPH_DIRECTED, IGRAPH_ALL);
+        print_vector(&eff_vec);
+
+        printf("\nLocal efficiency, directed, in-neighbors:\n");
+        igraph_local_efficiency(graph, &weights, &eff_vec, igraph_vss_all(), IGRAPH_DIRECTED, IGRAPH_IN);
+        print_vector(&eff_vec);
+
+        printf("\nLocal efficiency, directed, out-neighbors:\n");
+        igraph_local_efficiency(graph, &weights, &eff_vec, igraph_vss_all(), IGRAPH_DIRECTED, IGRAPH_OUT);
+        print_vector(&eff_vec);
+    }
+
+    printf("\n\n");
+
+    igraph_vector_destroy(&eff_vec);
+
+    return 0;
+}
+
+int test_ring(void) {
+    int result;
+    igraph_t graph;
+    const igraph_real_t weights_array[] = {1, 1, 1, 1};
+
+    igraph_ring(&graph, 4, IGRAPH_DIRECTED, /* mutual = */ false, /* circular = */ true);
+    result = test_graph("Ring graph", &graph, weights_array);
+    igraph_destroy(&graph);
+
+    VERIFY_FINALLY_STACK();
+
+    return result;
+}
+
+int test_small_graph(void) {
+    int result;
+    igraph_t graph;
+    const igraph_real_t weights_array[] = {4, 4, 4, 3, 1, 5, 1, 2, 4, 5, 3, 5, 5, 4, 1, 1, 5, 4, 1, 1, 2, 1, 3, 5};
+
+    igraph_small(&graph, 13, IGRAPH_DIRECTED,
+                 0,8, 1,3, 1,4, 1,5, 1,8, 1,10, 2,0, 2,1, 2,4, 3,5, 4,2, 4,7,
+                 4,9, 5,3, 5,10, 6,7, 8,2, 8,3, 8,4, 8,9, 9,3, 9,4, 11,9, 11,3,
+                 -1);
+    result = test_graph("Small test graph", &graph, weights_array);
+    igraph_destroy(&graph);
+
+    VERIFY_FINALLY_STACK();
+
+    return result;
+}
+
+int main(void) {
+
+    RUN_TEST(test_ring);
+    RUN_TEST(test_small_graph);
+
+    return 0;
+}