NAME¶

gvgen - generate graphs

SYNOPSIS¶

gvgen [ -d? ] [ -cn ] [ -Cx,y ] [ -g[f]x,y ] [ -G[f]x,y ] [ -hn ] [ -kn ] [ -bx,y ] [ -pn ] [ -sn ] [ -Sn ] [ -tn ] [ -Tx,y ] [ -wn ] [ -ooutfile ]

DESCRIPTION¶

gvgen generates a variety of simple, regularly-structured abstract graphs.

OPTIONS¶

The following options are supported:

-c n

Generate a cycle with n vertices and edges.

-C x,y

Generate an x by y cylinder. This will have x*y vertices and 2*x*y - y edges.

-g [f]x,y

Generate an x by y grid. If f is given, the grid is folded, with an edge attaching each pair of opposing corner vertices. This will have x*y vertices and 2*x*y - y - x edges if unfolded and 2*x*y - y - x + 2 edges if folded.

-G [f]x,y

Generate an x by y partial grid. If f is given, the grid is folded, with an edge attaching each pair of opposing corner vertices. This will have x*y vertices.

-h n

Generate a hypercube of degree n. This will have 2^n vertices and n*2^(n-1) edges.

-k n

Generate a complete graph on n vertices with n*(n-1)/2 edges.

-b x,y

Generate a complete x by y bipartite graph. This will have x+y vertices and x*y edges.

-p n

Generate a path on n vertices. This will have n-1 edges.

-s n

Generate a star on n vertices. This will have n-1 edges.

-S n

Generate a Sierpinski graph of order n. This will have 3*(3^(n-1) - 1)/2 vertices and 3^n edges.

-t n

Generate a binary tree of height n. This will have 2^n-1 vertices and 2^n-2 edges.

-T x,y

Generate an x by y torus. This will have x*y vertices and 2*x*y edges.

-w n

Generate a path on n vertices. This will have n-1 edges.

-o outfile

If specified, the generated graph is written into the file outfile. Otherwise, the graph is written to standard out.

-d

Make the generated graph directed.

-?

Print usage information.

EXIT STATUS¶

gvgen exits with 0 on successful completion, and exits with 1 if given an ill-formed or incorrect flag, or if the specified output file could not be opened.

AUTHOR¶

Emden R. Gansner <erg@research.att.com>

SEE ALSO¶

gc(1), acyclic(1), gvpr(1), gvcolor(1), ccomps(1), sccmap(1), tred(1), libgraph(3)