Manpages - gv.3r

gv_R - graph manipulation in R

System.loadLibrary(“gv”);

gv_R is a dynamically loaded extension for R that provides access to the graph facilities of graphviz.

New graphs

New empty graph

SWIGTYPE_p_Agraph_t gv.graph (string name);
SWIGTYPE_p_Agraph_t gv.digraph (string name);
SWIGTYPE_p_Agraph_t gv.strictgraph (string name);
SWIGTYPE_p_Agraph_t gv.strictdigraph (string name);

New graph from a dot-syntax string or file

SWIGTYPE_p_Agraph_t gv.readstring (string string);
SWIGTYPE_p_Agraph_t gv.read (string filename);
SWIGTYPE_p_Agraph_t gv.read (SWIGTYPE_p_FILE f);

Add new subgraph to existing graph

SWIGTYPE_p_Agraph_t gv.graph (SWIGTYPE_p_Agraph_t g, string name);

New nodes

Add new node to existing graph

SWIGTYPE_p_Agnode_t gv.node (SWIGTYPE_p_Agraph_t g, string name);

New edges

Add new edge between existing nodes

SWIGTYPE_p_Agedge_t gv.edge (SWIGTYPE_p_Agnode_t t, SWIGTYPE_p_Agnode_t h);

(no term)

Add a new edge between an existing tail node, and a named head node which will be induced in the graph if it doesn’t already exist ::
SWIGTYPE_p_Agedge_t gv.edge (SWIGTYPE_p_Agnode_t t, string hname);

(no term)

Add a new edge between an existing head node, and a named tail node which will be induced in the graph if it doesn’t already exist ::
SWIGTYPE_p_Agedge_t gv.edge (string tname, SWIGTYPE_p_Agnode_t h);

(no term)

Add a new edge between named tail and head nodes which will be induced in the graph if they don’t already exist ::
SWIGTYPE_p_Agedge_t gv.edge (SWIGTYPE_p_Agraph_t g, string tname, string hname);

Setting attribute values

(no term)

Set value of named attribute of graph/node/edge - creating attribute if necessary ::
string gv.setv (SWIGTYPE_p_Agraph_t g, string attr, string val);
string gv.setv (SWIGTYPE_p_Agnode_t n, string attr, string val);
string gv.setv (SWIGTYPE_p_Agedge_t e, string attr, string val);

(no term)

Set value of existing attribute of graph/node/edge (using attribute handle) ::
string gv.setv (SWIGTYPE_p_Agraph_t g, SWIGTYPE_p_Agsym_t a, string val);
string gv.setv (SWIGTYPE_p_Agnode_t n, SWIGTYPE_p_Agsym_t a, string val);
string gv.setv (SWIGTYPE_p_Agedge_t e, SWIGTYPE_p_Agsym_t a, string val);

Getting attribute values

Get value of named attribute of graph/node/edge

string gv.getv (SWIGTYPE_p_Agraph_t g, string attr);
string gv.getv (SWIGTYPE_p_Agnode_t n, string attr);
string gv.getv (SWIGTYPE_p_Agedge_t e, string attr);

(no term)

Get value of attribute of graph/node/edge (using attribute handle) ::
string gv.getv (SWIGTYPE_p_Agraph_t g, SWIGTYPE_p_Agsym_t a);
string gv.getv (SWIGTYPE_p_Agnode_t n, SWIGTYPE_p_Agsym_t a);
string gv.getv (SWIGTYPE_p_Agedge_t e, SWIGTYPE_p_Agsym_t a);

Obtain names from handles

string gv.nameof (SWIGTYPE_p_Agraph_t g);
string gv.nameof (SWIGTYPE_p_Agnode_t n);
string gv.nameof (SWIGTYPE_p_Agsym_t a);

Find handles from names

SWIGTYPE_p_Agraph_t gv.findsubg (SWIGTYPE_p_Agraph_t g, string name);
SWIGTYPE_p_Agnode_t gv.findnode (SWIGTYPE_p_Agraph_t g, string name);
SWIGTYPE_p_Agedge_t gv.findedge (SWIGTYPE_p_Agnode_t t, SWIGTYPE_p_Agnode_t h);
SWIGTYPE_p_Agsym_t gv.findattr (SWIGTYPE_p_Agraph_t g, string name);
SWIGTYPE_p_Agsym_t gv.findattr (SWIGTYPE_p_Agnode_t n, string name);
SWIGTYPE_p_Agsym_t gv.findattr (SWIGTYPE_p_Agedge_t e, string name);

Misc graph navigators returning handles

SWIGTYPE_p_Agnode_t gv.headof (SWIGTYPE_p_Agedge_t e);
SWIGTYPE_p_Agnode_t gv.tailof (SWIGTYPE_p_Agedge_t e);
SWIGTYPE_p_Agraph_t gv.graphof (SWIGTYPE_p_Agraph_t g);
SWIGTYPE_p_Agraph_t gv.graphof (SWIGTYPE_p_Agedge_t e);
SWIGTYPE_p_Agraph_t gv.graphof (SWIGTYPE_p_Agnode_t n);
SWIGTYPE_p_Agraph_t gv.rootof (SWIGTYPE_p_Agraph_t g);

(no term)

Obtain handles of proto node/edge for setting default attribute values ::
SWIGTYPE_p_Agnode_t gv.protonode (SWIGTYPE_p_Agraph_t g);
SWIGTYPE_p_Agedge_t gv.protoedge (SWIGTYPE_p_Agraph_t g);

Iterators

Iteration termination tests

bool gv.ok (SWIGTYPE_p_Agraph_t g);
bool gv.ok (SWIGTYPE_p_Agnode_t n);
bool gv.ok (SWIGTYPE_p_Agedge_t e);
bool gv.ok (SWIGTYPE_p_Agsym_t a);

Iterate over subgraphs of a graph

SWIGTYPE_p_Agraph_t gv.firstsubg (SWIGTYPE_p_Agraph_t g);
SWIGTYPE_p_Agraph_t gv.nextsubg (SWIGTYPE_p_Agraph_t g, SWIGTYPE_p_Agraph_t sg);

Iterate over supergraphs of a graph (obscure and rarely useful)

SWIGTYPE_p_Agraph_t gv.firstsupg (SWIGTYPE_p_Agraph_t g);
SWIGTYPE_p_Agraph_t gv.nextsupg (SWIGTYPE_p_Agraph_t g, SWIGTYPE_p_Agraph_t sg);

Iterate over edges of a graph

SWIGTYPE_p_Agedge_t gv.firstedge (SWIGTYPE_p_Agraph_t g);
SWIGTYPE_p_Agedge_t gv.nextedge (SWIGTYPE_p_Agraph_t g, SWIGTYPE_p_Agedge_t e);

Iterate over outedges of a graph

SWIGTYPE_p_Agedge_t gv.firstout (SWIGTYPE_p_Agraph_t g);
SWIGTYPE_p_Agedge_t gv.nextout (SWIGTYPE_p_Agraph_t g, SWIGTYPE_p_Agedge_t e);

Iterate over edges of a node

SWIGTYPE_p_Agedge_t gv.firstedge (SWIGTYPE_p_Agnode_t n);
SWIGTYPE_p_Agedge_t gv.nextedge (SWIGTYPE_p_Agnode_t n, SWIGTYPE_p_Agedge_t e);

Iterate over out-edges of a node

SWIGTYPE_p_Agedge_t gv.firstout (SWIGTYPE_p_Agnode_t n);
SWIGTYPE_p_Agedge_t gv.nextout (SWIGTYPE_p_Agnode_t n, SWIGTYPE_p_Agedge_t e);

Iterate over head nodes reachable from out-edges of a node

SWIGTYPE_p_Agnode_t gv.firsthead (SWIGTYPE_p_Agnode_t n);
SWIGTYPE_p_Agnode_t gv.nexthead (SWIGTYPE_p_Agnode_t n, SWIGTYPE_p_Agnode_t h);

Iterate over in-edges of a graph

SWIGTYPE_p_Agedge_t gv.firstin (SWIGTYPE_p_Agraph_t g);
SWIGTYPE_p_Agedge_t gv.nextin (SWIGTYPE_p_Agnode_t n, SWIGTYPE_p_Agedge_t e);

Iterate over in-edges of a node

SWIGTYPE_p_Agedge_t gv.firstin (SWIGTYPE_p_Agnode_t n);
SWIGTYPE_p_Agedge_t gv.nextin (SWIGTYPE_p_Agraph_t g, SWIGTYPE_p_Agedge_t e);

Iterate over tail nodes reachable from in-edges of a node

SWIGTYPE_p_Agnode_t gv.firsttail (SWIGTYPE_p_Agnode_t n);
SWIGTYPE_p_Agnode_t gv.nexttail (SWIGTYPE_p_Agnode_t n, SWIGTYPE_p_Agnode_t t);

Iterate over nodes of a graph

SWIGTYPE_p_Agnode_t gv.firstnode (SWIGTYPE_p_Agraph_t g);
SWIGTYPE_p_Agnode_t gv.nextnode (SWIGTYPE_p_Agraph_t g, SWIGTYPE_p_Agnode_t n);

Iterate over nodes of an edge

SWIGTYPE_p_Agnode_t gv.firstnode (SWIGTYPE_p_Agedge_t e);
SWIGTYPE_p_Agnode_t gv.nextnode (SWIGTYPE_p_Agedge_t e, SWIGTYPE_p_Agnode_t n);

Iterate over attributes of a graph

SWIGTYPE_p_Agsym_t gv.firstattr (SWIGTYPE_p_Agraph_t g);
SWIGTYPE_p_Agsym_t gv.nextattr (SWIGTYPE_p_Agraph_t g, SWIGTYPE_p_Agsym_t a);

Iterate over attributes of an edge

SWIGTYPE_p_Agsym_t gv.firstattr (SWIGTYPE_p_Agedge_t e);
SWIGTYPE_p_Agsym_t gv.nextattr (SWIGTYPE_p_Agedge_t e, SWIGTYPE_p_Agsym_t a);

Iterate over attributes of a node

SWIGTYPE_p_Agsym_t gv.firstattr (SWIGTYPE_p_Agnode_t n);
SWIGTYPE_p_Agsym_t gv.nextattr (SWIGTYPE_p_Agnode_t n, SWIGTYPE_p_Agsym_t a);

Remove graph objects

bool gv.rm (SWIGTYPE_p_Agraph_t g);
bool gv.rm (SWIGTYPE_p_Agnode_t n);
bool gv.rm (SWIGTYPE_p_Agedge_t e);

Layout

(no term)

Annotate a graph with layout attributes and values using a specific layout engine ::
bool gv.layout (SWIGTYPE_p_Agraph_t g, string engine);

Render

Render a layout into attributes of the graph

bool gv.render (SWIGTYPE_p_Agraph_t g);

Render a layout to stdout

bool gv.render (SWIGTYPE_p_Agraph_t g, string format);

Render to an open file

bool gv.render (SWIGTYPE_p_Agraph_t g, string format, SWIGTYPE_p_FILE fout);

Render a layout to an unopened file by name

bool gv.render (SWIGTYPE_p_Agraph_t g, string format, string filename);

Render to a string result

string gv.renderresult (SWIGTYPE_p_Agraph_t ing, string format);
gv.renderresult (SWIGTYPE_p_Agraph_t g, string format, string outdata);

Render to an open channel

bool gv.renderchannel (SWIGTYPE_p_Agraph_t g, string format, string channelname);

(no term)

Render a layout to a malloc’ed string, to be free’d by the caller ::

(deprecated - too easy to leak memory)

(still needed for “eval [gv::renderdata $G tk]” )

string gv.renderdata (SWIGTYPE_p_Agraph_t g, string format);

Writing graph back to file

bool gv.write (SWIGTYPE_p_Agraph_t g, string filename);
bool gv.write (SWIGTYPE_p_Agraph_t g, SWIGTYPE_p_FILE f);

Graph transformation tools

bool gv.tred (SWIGTYPE_p_Agraph_t g);

graph, dot, neato, fdp, circo, twopi, R.