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smyrna - interactive graph viewer
smyrna [ -v? ] [ file ]
is a viewer for graphs in the DOT format. It is especially designed to handle
large graphs, and allows flat and topological fisheye views. It is assumed
the input graph has position information associated with all nodes. Using
the Graphviz convention, a node’s position is given by its pos attribute
consisting of 2 or 3 floating point numbers separated by commas. Nodes are
drawn as points and edges as line segments.
If smyrna detects that the file
contains xdot attributes, it will use this information when drawing nodes
smyrna supports panning and zooming; node and edge selection;
setting and retrieving node and edge attributes, especially colors; and
node movement. The Smyrna Settings dialogue box available under the Edit
pull-down menu gives the user many choices for tailoring the graph view.
These include whether or not nodes/edges are drawn; what labels are associated
with nodes/edges; node size; transparency settings for nodes/edges; parameters
associated with the topological fisheye view.
For the purposes of exploratory
data analysis, smyrna provides access to the gvpr library. This allows the
user to arbitrarily query, filter or manipulate a graph. When filtering
or manipulating a graph, the user has the option of performing the changes
directly on the input graph, or to create a new version with the changes.
The following options are supported:
- Verbose mode.
- Print usage
By default, gc returns the number of nodes and edges.
following operand is supported:
The following exit
values are returned:
- Name of file containing a graph in
DOT format. If no file operand is specified, the user can employ the File
pull-down menu to select a file to be opened.
smyrna relies on numerous
support files. These are usually installed in the "share/graphviz/smyrna"
directory below the installation root. The principal files are:
- Successful completion.
- If no No appropriate OpenGL-capable
visual found, or if the default attributes template graph file or the default
attributes widget graph file could not be read.
- A file in DOT format specifying the default smyrna settings. In particular,
these are used to initialize the settings of the Smyrna Settings dialogue
- A text file specifying the mapping of concrete mouse
and keyboard events with smyrna actions such as panning and selecting.
- A file in DOT format specifying the bindings between GUI widgets and smyrna
Arif Bilgin <firstname.lastname@example.org>
- allows a user to override the
built-in path to the directory containing all of smyrna’s files described
Emden R. Gansner <email@example.com>
gvpr(1), dotty(1), libcgraph(3)
"Smyrna Tutorial and Reference Manual"
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