connex

Scilab function
Last update : September 1995

connex - connected components

### Calling Sequence

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

### Parameters

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

### Description

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

### Examples

    ta=[1 1 2 2 2 3 4 4 5 6 7 7 7 8 9 10 12 12 13 13 14 15];
    he=[2 6 3 4 5 1 3 5 1 7 5 8 9 5 8 11 10 11 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]=connex(g)
    g('node_color')=10+ncomp;
    g('node_diam')=10+10*ncomp;
    x_message('Displaying the connected components of this graph');
    show_graph(g);

### See Also

`con_nodes` , `is_connex` , `strong_connex` , `strong_con_nodes` ,