index_from_tail_head — Computes the index of edges given by (tail,head) pairs
i = index_from_tail_head(g,t,h)
a vector: edges tail node numbers.
a vector: edges head node numbers.
a row vector of edge numbers
i = index_from_tail_head(g,tail,head)
computes the
index of edges given by (tail(k),head(k))
pairs
relative to the graph g
.
ta=[27 27 3 12 11 12 27 26 26 25 25 24 23 23 21 22 21 20 19 18 18]; ta=[ta 16 15 15 14 12 9 10 6 9 17 8 17 10 20 11 23 23 12 18 28 14]; he=[ 1 2 2 4 5 11 13 1 25 22 24 22 22 19 13 13 14 16 16 9 16]; he=[he 10 10 11 12 2 6 5 5 7 8 7 9 6 11 4 18 13 3 28 17 12]; n=28; g=make_graph('foo',1,n,ta,he); xx=[46 120 207 286 366 453 543 544 473 387 300 206 136 250 346 408]; g.nodes.graphics.x=[xx 527 443 306 326 196 139 264 55 58 46 118 513]; yy=[36 34 37 40 38 40 35 102 102 98 93 96 167 172 101 179]; g.nodes.graphics.y=[yy 198 252 183 148 172 256 259 258 167 109 104 253]; g.nodes.graphics.display='number'; show_graph(g); i = index_from_tail_head(g,[22 14 17],[13 12 9]) hilite_edges(i)