Scilab function

delete_arcs - deletes all the arcs or edges between a set of nodes

### Calling Sequence

g1 = delete_arcs(ij,g)

### Parameters

• ij : matrix of integers (number of nodes)
• g : graph list
• g1 : graph list of the new graph without the arcs or edges defined by ij

### Description

If g is a directed graph, delete_arcs returns the graph g1 with the arcs defined by matrix ij being deleted. ij must be a n x 2 matrix of node numbers: the n arcs to be deleted are defined by couples of nodes (ij(i,1), ij(i,2)).

If g is an undirected graph, the edges corresponding to matrix ij are deleted.

### Examples

```ta=[1 1 2 2 2 3 4 5 5 7 8 8 9 10 10 10 10 10 11 12 13 13 13 14 15 16 16 17 17];
he=[2 10 3 5 7 4 2 4 6 8 6 9 7 7 11 13 13 15 12 13 9 10 14 11 16 1 17 14 15];
g=make_graph('foo',1,17,ta,he);
g('node_x')=[283 163 63 57 164 164 273 271 339 384 504 513 439 623 631 757 642];
g('node_y')=[59 133 223 318 227 319 221 324 432 141 209 319 428 443 187 151 301];
show_graph(g);
ij=[13 10;8 6;5 4;4 2];
gt=delete_arcs(ij,g);
show_graph(gt,'new');
g('directed')=0;
gt=delete_arcs(ij,g);
show_graph(gt,'new');
```