strong_connex

Scilab function
Last update : September 1995

strong_connex - strong connected components

### Calling Sequence

  `[nc,ncomp] = strong_connex(g)`

### Parameters

- `g` : graph list
- `nc` : integer, number of strong connected components
- `ncomp` : row vector of strong connected components

### Description

`strong_connex` returns the number `nc` of strong connected components for the graph `g` and a row vector `ncomp` giving the number of the strong connected component for each node. For instance, if `i` is a node number, `ncomp(i)` is the number of the strong connected component to which node `i` belongs.

### Examples

    ta=[1 1 2 2 2 3 4 4 5 6 6 6 7 7 7 8 9 10 12 12 13 13 13 14 15];
    he=[2 6 3 4 5 1 3 5 1 7 10 11 5 8 9 5 8 11 10 11 9 11 15 13 14];
    g=make_graph('foo',1,15,ta,he);
    g('node_x')=[197 191 106 194 296 305 305 418 422 432 552 550 549 416 548];
    g('node_y')=[76 181 276 278 276 83 174 281 177 86 175 90 290 397 399];
    show_graph(g);
    [nc,ncomp]=strong_connex(g);
    g1=g; g1('node_color')=8+ncomp; g1('node_diam')=10+5*ncomp;
    x_message('Connected components of the graph');
    show_graph(g1);

### See Also

`connex` , `con_nodes` , `strong_con_nodes` ,