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.TH strong_connex 1 "September 1995" "Scilab Group" "Scilab function"
.so ../sci.an
.SH NAME
strong_connex - strong connected components
.SH CALLING SEQUENCE
.nf
[nc,ncomp] = strong_connex(g)
.fi
.SH PARAMETERS
.TP 2
g
: graph list
.TP 3
nc
: integer, number of strong connected components
.TP 6
ncomp
: row vector of strong connected components
.SH DESCRIPTION
\fVstrong_connex\fR returns the number \fVnc\fR of strong connected components
for the graph \fVg\fR and a row vector \fVncomp\fR giving the number of the
strong connected component for each node.
For instance, if \fVi\fR is a node number, \fVncomp[i]\fR is the number of
the strong connected component to which node \fVi\fR belongs.
.SH EXAMPLE
.nf
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);
.fi
.SH SEE ALSO
connex, con_nodes, strong_con_nodes
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