Scilab function

path_2_nodes - set of nodes from a path

### Calling Sequence

  `ns = path_2_nodes(p,g)`

### Parameters

- `p` : row vector of integer numbers of the arcs of the path
- `g` : graph list
- `ns` : row vector of integer numbers of the set of nodes

### Description

`path_2_nodes` returns the set of nodes `ns` corresponding to the path `p` given by its arc numbers ; if `p` is not a path, the empty vector `[]` is returned.

### Examples

    ta=[1 1 2 2 2 3 4 5 5 7 8 8 9 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 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);
    p=[2 16 23 25 26 22 17 18 19 13 10 11];
    g1=g; edgecolor=1*ones(ta); edgecolor(p)=11*ones(p);
    g1('edge_color')=edgecolor;
    show_graph(g1); show_arcs(p);
    ns=path_2_nodes(p,g);
    g1=g; nodecolor=1*ones(g1('node_number')); nodecolor(ns)=11*ones(ns);
    g1('node_color')=nodecolor;
    show_graph(g1);show_nodes(ns);
    show_arcs(p,'sup');

### See Also

`nodes_2_path` ,