int main() {
igraph_t g;
igraph_vector_t v;
int ret;
/* without edges */
igraph_empty(&g, 5, IGRAPH_DIRECTED);
igraph_add_vertices(&g, 2, 0);
igraph_add_vertices(&g, 3, 0);
igraph_add_vertices(&g, 1, 0);
igraph_add_vertices(&g, 4, 0);
if (igraph_vcount(&g) != 15) {
return 1;
}
igraph_delete_vertices(&g, igraph_vss_1(2));
if (igraph_vcount(&g) != 14) {
return 2;
}
igraph_destroy(&g);
igraph_vector_init(&v, 8);
VECTOR(v)[0]=0; VECTOR(v)[1]=1;
VECTOR(v)[2]=1; VECTOR(v)[3]=2;
VECTOR(v)[4]=2; VECTOR(v)[5]=3;
VECTOR(v)[6]=2; VECTOR(v)[7]=2;
igraph_create(&g, &v, 0, 0);
igraph_vector_destroy(&v);
/* resize vector */
igraph_delete_vertices(&g, igraph_vss_1(2));
if (igraph_vcount(&g) != 3) {
return 3;
}
if (igraph_ecount(&g) != 1) {
return 4;
}
/* error test */
igraph_set_error_handler(igraph_error_handler_ignore);
ret=igraph_delete_vertices(&g, igraph_vss_1(3));
if (ret != IGRAPH_EINVVID) {
return 5;
}
igraph_destroy(&g);
return 0;
}
int main() {
igraph_t g;
igraph_vector_t v, res, reset, weights;
igraph_arpack_options_t arpack_options;
igraph_real_t value;
int ret;
igraph_pagerank_power_options_t power_options;
/* Test graphs taken from http://www.iprcom.com/papers/pagerank/ */
igraph_vector_init(&v, 10);
VECTOR(v)[0]=0; VECTOR(v)[1]=1;
VECTOR(v)[2]=1; VECTOR(v)[3]=2;
VECTOR(v)[4]=2; VECTOR(v)[5]=0;
VECTOR(v)[6]=3; VECTOR(v)[7]=2;
VECTOR(v)[8]=0; VECTOR(v)[9]=2;
igraph_create(&g, &v, 0, 1);
igraph_vector_init(&res, 0);
oldwarn=igraph_set_warning_handler(warning_handler_stdout);
igraph_pagerank_old(&g, &res, igraph_vss_all(), 1, 1000, 0.001, 0.85, 0);
print_vector(&res, stdout);
igraph_vector_destroy(&res);
igraph_vector_destroy(&v);
igraph_destroy(&g);
igraph_vector_init(&v, 28);
VECTOR(v)[ 0]=0; VECTOR(v)[ 1]=1;
VECTOR(v)[ 2]=0; VECTOR(v)[ 3]=2;
VECTOR(v)[ 4]=0; VECTOR(v)[ 5]=3;
VECTOR(v)[ 6]=1; VECTOR(v)[ 7]=0;
VECTOR(v)[ 8]=2; VECTOR(v)[ 9]=0;
VECTOR(v)[10]=3; VECTOR(v)[11]=0;
VECTOR(v)[12]=3; VECTOR(v)[13]=4;
VECTOR(v)[14]=3; VECTOR(v)[15]=5;
VECTOR(v)[16]=3; VECTOR(v)[17]=6;
VECTOR(v)[18]=3; VECTOR(v)[19]=7;
VECTOR(v)[20]=4; VECTOR(v)[21]=0;
VECTOR(v)[22]=5; VECTOR(v)[23]=0;
VECTOR(v)[24]=6; VECTOR(v)[25]=0;
VECTOR(v)[26]=7; VECTOR(v)[27]=0;
igraph_create(&g, &v, 0, 1);
igraph_vector_init(&res, 0);
igraph_pagerank_old(&g, &res, igraph_vss_all(), 1, 10000, 0.0001, 0.85, 0);
print_vector(&res, stdout);
igraph_vector_destroy(&res);
igraph_vector_destroy(&v);
igraph_destroy(&g);
igraph_set_warning_handler(oldwarn);
/* New PageRank */
igraph_star(&g, 11, IGRAPH_STAR_UNDIRECTED, 0);
igraph_vector_init(&res, 0);
igraph_arpack_options_init(&arpack_options);
igraph_pagerank(&g, IGRAPH_PAGERANK_ALGO_ARPACK, &res, 0,
igraph_vss_all(), 0, 0.85, 0, &arpack_options);
print_vector(&res, stdout);
igraph_pagerank(&g, IGRAPH_PAGERANK_ALGO_PRPACK, &res, 0,
igraph_vss_all(), 0, 0.85, 0, 0);
print_vector(&res, stdout);
/* Check twice more for consistency */
igraph_pagerank(&g, IGRAPH_PAGERANK_ALGO_ARPACK, &res, 0,
igraph_vss_all(), 0, 0.85, 0, &arpack_options);
print_vector(&res, stdout);
igraph_pagerank(&g, IGRAPH_PAGERANK_ALGO_PRPACK, &res, 0,
igraph_vss_all(), 0, 0.85, 0, 0);
print_vector(&res, stdout);
igraph_pagerank(&g, IGRAPH_PAGERANK_ALGO_ARPACK, &res, 0,
igraph_vss_all(), 0, 0.85, 0, &arpack_options);
print_vector(&res, stdout);
igraph_pagerank(&g, IGRAPH_PAGERANK_ALGO_PRPACK, &res, 0,
igraph_vss_all(), 0, 0.85, 0, 0);
print_vector(&res, stdout);
/* Check personalized PageRank */
igraph_personalized_pagerank_vs(&g, IGRAPH_PAGERANK_ALGO_ARPACK, &res, 0,
igraph_vss_all(), 0, 0.5,
igraph_vss_1(1), 0, &arpack_options);
print_vector(&res, stdout);
igraph_personalized_pagerank_vs(&g, IGRAPH_PAGERANK_ALGO_PRPACK, &res, 0,
igraph_vss_all(), 0, 0.5,
igraph_vss_1(1), 0, 0);
print_vector(&res, stdout);
/* Errors */
power_options.niter = -1; power_options.eps=0.0001;
igraph_set_error_handler(igraph_error_handler_ignore);
igraph_set_warning_handler(igraph_warning_handler_ignore);
ret=igraph_pagerank(&g, IGRAPH_PAGERANK_ALGO_POWER, &res,
/*value=*/ 0, igraph_vss_all(), 1, 0.85,
/*weights=*/ 0, &power_options);
if (ret != IGRAPH_EINVAL) {
return 1;
}
power_options.niter=10000; power_options.eps=-1;
ret=igraph_pagerank(&g, IGRAPH_PAGERANK_ALGO_POWER, &res,
/*value=*/ 0, igraph_vss_all(), 1, 0.85,
/*weights=*/ 0, &power_options);
if (ret != IGRAPH_EINVAL) {
return 2;
}
power_options.niter=10000; power_options.eps=0.0001;
ret=igraph_pagerank(&g, IGRAPH_PAGERANK_ALGO_POWER, &res,
/*value=*/ 0, igraph_vss_all(), 1, 1.2,
/*weights=*/ 0, &power_options);
if (ret != IGRAPH_EINVAL) {
return 3;
}
igraph_vector_init(&reset, 2);
ret=igraph_personalized_pagerank(&g, IGRAPH_PAGERANK_ALGO_ARPACK, &res, 0,
igraph_vss_all(), 0, 0.85, &reset, 0,
&arpack_options);
if (ret != IGRAPH_EINVAL) {
return 4;
}
ret=igraph_personalized_pagerank(&g, IGRAPH_PAGERANK_ALGO_PRPACK, &res, 0,
igraph_vss_all(), 0, 0.85, &reset, 0, 0);
if (ret != IGRAPH_EINVAL) {
return 4;
}
igraph_vector_resize(&reset, 10);
igraph_vector_fill(&reset, 0);
ret=igraph_personalized_pagerank(&g, IGRAPH_PAGERANK_ALGO_ARPACK,
&res, 0, igraph_vss_all(), 0, 0.85,
&reset, 0, &arpack_options);
if (ret != IGRAPH_EINVAL) {
return 5;
}
ret=igraph_personalized_pagerank(&g, IGRAPH_PAGERANK_ALGO_PRPACK,
&res, 0, igraph_vss_all(), 0, 0.85,
&reset, 0, 0);
if (ret != IGRAPH_EINVAL) {
return 5;
}
igraph_vector_destroy(&reset);
igraph_destroy(&g);
igraph_set_error_handler(igraph_error_handler_abort);
/* Special cases: check for empty graph */
igraph_empty(&g, 10, 0);
igraph_pagerank(&g, IGRAPH_PAGERANK_ALGO_ARPACK, &res, &value,
igraph_vss_all(), 1, 0.85, 0, &arpack_options);
if (value != 1.0) {
return 6;
}
igraph_pagerank(&g, IGRAPH_PAGERANK_ALGO_PRPACK, &res, &value,
igraph_vss_all(), 1, 0.85, 0, 0);
if (value != 1.0) {
return 6;
}
print_vector(&res, stdout);
igraph_destroy(&g);
/* Special cases: check for full graph, zero weights */
igraph_full(&g, 10, 0, 0);
igraph_vector_init(&v, 45);
igraph_vector_fill(&v, 0);
igraph_pagerank(&g, IGRAPH_PAGERANK_ALGO_ARPACK, &res, &value,
igraph_vss_all(), 1, 0.85, &v, &arpack_options);
if (value != 1.0) {
return 7;
}
igraph_pagerank(&g, IGRAPH_PAGERANK_ALGO_PRPACK, &res, &value,
igraph_vss_all(), 1, 0.85, &v, 0);
if (value != 1.0) {
return 7;
}
igraph_vector_destroy(&v);
print_vector(&res, stdout);
igraph_destroy(&g);
/* Another test case for PageRank (bug #792352) */
igraph_small(&g, 9, 1, 0, 5, 1, 5, 2, 0, 3, 1, 5, 4, 5, 7, 6, 0, 8, 0, 8, 1, -1);
igraph_vector_init(&weights, 9);
VECTOR(weights)[0] = 4; VECTOR(weights)[1] = 5; VECTOR(weights)[2] = 5;
VECTOR(weights)[3] = 4; VECTOR(weights)[4] = 4; VECTOR(weights)[5] = 4;
VECTOR(weights)[6] = 3; VECTOR(weights)[7] = 4; VECTOR(weights)[8] = 4;
igraph_pagerank(&g, IGRAPH_PAGERANK_ALGO_ARPACK, &res, 0,
igraph_vss_all(), 1, 0.85, &weights, &arpack_options);
print_vector(&res, stdout);
igraph_pagerank(&g, IGRAPH_PAGERANK_ALGO_PRPACK, &res, 0,
igraph_vss_all(), 1, 0.85, &weights, 0);
print_vector(&res, stdout);
igraph_vector_destroy(&weights);
igraph_destroy(&g);
igraph_vector_destroy(&res);
return 0;
}
int main() {
igraph_t g, g2;
FILE *ifile;
igraph_vector_t gtypes, vtypes, etypes;
igraph_strvector_t gnames, vnames, enames;
long int i;
igraph_vector_t y;
igraph_strvector_t id;
char str[20];
/* turn on attribute handling */
igraph_i_set_attribute_table(&igraph_cattribute_table);
ifile=fopen("LINKS.NET", "r");
if (ifile==0) {
return 10;
}
igraph_read_graph_pajek(&g, ifile);
fclose(ifile);
igraph_vector_init(>ypes, 0);
igraph_vector_init(&vtypes, 0);
igraph_vector_init(&etypes, 0);
igraph_strvector_init(&gnames, 0);
igraph_strvector_init(&vnames, 0);
igraph_strvector_init(&enames, 0);
igraph_cattribute_list(&g, &gnames, >ypes, &vnames, &vtypes,
&enames, &etypes);
/* List attribute names and types */
printf("Graph attributes: ");
for (i=0; i<igraph_strvector_size(&gnames); i++) {
printf("%s (%i) ", STR(gnames, i), (int)VECTOR(gtypes)[i]);
}
printf("\n");
printf("Vertex attributes: ");
for (i=0; i<igraph_strvector_size(&vnames); i++) {
printf("%s (%i) ", STR(vnames, i), (int)VECTOR(vtypes)[i]);
}
printf("\n");
printf("Edge attributes: ");
for (i=0; i<igraph_strvector_size(&enames); i++) {
printf("%s (%i) ", STR(enames, i), (int)VECTOR(etypes)[i]);
}
printf("\n");
print_attributes(&g);
/* Copying a graph */
igraph_copy(&g2, &g);
print_attributes(&g2);
igraph_destroy(&g2);
/* Adding vertices */
igraph_add_vertices(&g, 3, 0);
print_attributes(&g);
/* Adding edges */
igraph_add_edge(&g, 1, 1);
igraph_add_edge(&g, 2, 5);
igraph_add_edge(&g, 3, 6);
print_attributes(&g);
/* Deleting vertices */
igraph_delete_vertices(&g, igraph_vss_1(1));
igraph_delete_vertices(&g, igraph_vss_1(4));
print_attributes(&g);
/* Deleting edges */
igraph_delete_edges(&g, igraph_ess_1(igraph_ecount(&g)-1));
igraph_delete_edges(&g, igraph_ess_1(0));
print_attributes(&g);
/* Set graph attributes */
SETGAN(&g, "id", 10);
if (GAN(&g, "id") != 10) {
return 11;
}
SETGAS(&g, "name", "toy");
if (strcmp(GAS(&g, "name"), "toy")) {
return 12;
}
/* Delete graph attributes */
DELGA(&g, "id");
DELGA(&g, "name");
igraph_cattribute_list(&g, &gnames, 0,0,0,0,0);
if (igraph_strvector_size(&gnames) != 0) {
return 14;
}
/* Delete vertex attributes */
DELVA(&g, "x");
DELVA(&g, "shape");
DELVA(&g, "xfact");
DELVA(&g, "yfact");
igraph_cattribute_list(&g, 0,0, &vnames, 0,0,0);
if (igraph_strvector_size(&vnames) != 2) {
return 15;
}
/* Delete edge attributes */
igraph_cattribute_list(&g, 0,0,0,0,&enames,0);
i=igraph_strvector_size(&enames);
DELEA(&g, "hook1");
DELEA(&g, "hook2");
DELEA(&g, "label");
igraph_cattribute_list(&g, 0,0,0,0,&enames,0);
if (igraph_strvector_size(&enames) != i-3) {
return 16;
}
/* Set vertex attributes */
SETVAN(&g, "y", 0, -1);
SETVAN(&g, "y", 1, 2.1);
if (VAN(&g, "y", 0) != -1 ||
VAN(&g, "y", 1) != 2.1) {
return 17;
}
SETVAS(&g, "id", 0, "foo");
SETVAS(&g, "id", 1, "bar");
if (strcmp(VAS(&g, "id", 0), "foo") ||
strcmp(VAS(&g, "id", 1), "bar")) {
return 18;
}
/* Set edge attributes */
SETEAN(&g, "weight", 2, 100.0);
SETEAN(&g, "weight", 0, -100.1);
if (EAN(&g, "weight", 2) != 100.0 ||
EAN(&g, "weight", 0) != -100.1) {
return 19;
}
SETEAS(&g, "color", 2, "RED");
SETEAS(&g, "color", 0, "Blue");
if (strcmp(EAS(&g, "color", 2), "RED") ||
strcmp(EAS(&g, "color", 0), "Blue")) {
return 20;
}
/* Set vector attributes as vector */
igraph_vector_init(&y, igraph_vcount(&g));
igraph_vector_fill(&y, 1.23);
SETVANV(&g, "y", &y);
igraph_vector_destroy(&y);
for (i=0; i<igraph_vcount(&g); i++) {
if (VAN(&g, "y", i) != 1.23) {
return 21;
}
}
igraph_vector_init_seq(&y, 0, igraph_vcount(&g)-1);
SETVANV(&g, "foobar", &y);
igraph_vector_destroy(&y);
for (i=0; i<igraph_vcount(&g); i++) {
if (VAN(&g, "foobar", i) != i) {
return 22;
}
}
igraph_strvector_init(&id, igraph_vcount(&g));
for (i=0; i<igraph_vcount(&g); i++) {
snprintf(str, sizeof(str)-1, "%li", i);
igraph_strvector_set(&id, i, str);
}
SETVASV(&g, "foo", &id);
igraph_strvector_destroy(&id);
for (i=0; i<igraph_vcount(&g); i++) {
printf("%s ", VAS(&g, "foo", i));
}
printf("\n");
igraph_strvector_init(&id, igraph_vcount(&g));
for (i=0; i<igraph_vcount(&g); i++) {
snprintf(str, sizeof(str)-1, "%li", i);
igraph_strvector_set(&id, i, str);
}
SETVASV(&g, "id", &id);
igraph_strvector_destroy(&id);
for (i=0; i<igraph_vcount(&g); i++) {
printf("%s ", VAS(&g, "id", i));
}
printf("\n");
/* Set edge attributes as vector */
igraph_vector_init(&y, igraph_ecount(&g));
igraph_vector_fill(&y, 12.3);
SETEANV(&g, "weight", &y);
igraph_vector_destroy(&y);
for (i=0; i<igraph_ecount(&g); i++) {
if (EAN(&g, "weight", i) != 12.3) {
return 23;
}
}
igraph_vector_init_seq(&y, 0, igraph_ecount(&g)-1);
SETEANV(&g, "foobar", &y);
igraph_vector_destroy(&y);
for (i=0; i<igraph_ecount(&g); i++) {
if (VAN(&g, "foobar", i) != i) {
return 24;
}
}
igraph_strvector_init(&id, igraph_ecount(&g));
for (i=0; i<igraph_ecount(&g); i++) {
snprintf(str, sizeof(str)-1, "%li", i);
igraph_strvector_set(&id, i, str);
}
SETEASV(&g, "foo", &id);
igraph_strvector_destroy(&id);
for (i=0; i<igraph_ecount(&g); i++) {
printf("%s ", EAS(&g, "foo", i));
}
printf("\n");
igraph_strvector_init(&id, igraph_ecount(&g));
for (i=0; i<igraph_ecount(&g); i++) {
snprintf(str, sizeof(str)-1, "%li", i);
igraph_strvector_set(&id, i, str);
}
SETEASV(&g, "color", &id);
igraph_strvector_destroy(&id);
for (i=0; i<igraph_ecount(&g); i++) {
printf("%s ", EAS(&g, "color", i));
}
printf("\n");
/* Delete all remaining attributes */
DELALL(&g);
igraph_cattribute_list(&g, &gnames, >ypes, &vnames, &vtypes, &enames, &etypes);
if (igraph_strvector_size(&gnames) != 0 ||
igraph_strvector_size(&vnames) != 0 ||
igraph_strvector_size(&enames) != 0) {
return 25;
}
/* Destroy */
igraph_vector_destroy(>ypes);
igraph_vector_destroy(&vtypes);
igraph_vector_destroy(&etypes);
igraph_strvector_destroy(&gnames);
igraph_strvector_destroy(&vnames);
igraph_strvector_destroy(&enames);
igraph_destroy(&g);
return 0;
}
