MINGLE(1)

NAME
mingle - fast edge bundling

SYNOPSIS
mingle [ options ] [ -o outfile ] [ files ]

DESCRIPTION
mingle takes as input a graph in DOT format with node position information (the pos attribute) and bundles the edges.

OPTIONS
The following options are supported:

-m k
    indicates which method to use for bundling. A value of 0 corresponds to a force-directed bundling. A value of 2 uses a cluster plus ink saving approach. If available, a value 1 denotes an agglomerative ink saving method. Normally, the last is the default.

-a k
    specifies the maximum turning angle, in degrees, as a non-negative real. The larger the value, the more edges may bend. If the value is 0, there is no limitation on the turning angle. The default is 40. The parameter is not used in force-directed bundling.

-c v
    specifies which compatibility measure to use. The value 0, the default, uses a distance metric, while a value of 1 relies on full compatibility. This value is only used in force-directed bundling.

-i k
    gives the maximum number of iterative divisions of edges allowed in force-directed bundling. The default is 4.

-k k
    gives the number of neighbors to be used in forming a nearest neighbor graph. This parameter is only used in the agglomerative method. The default is 10.

-K k
    is a positive real value giving the force constant used in force-directed bundling. By default, the value is determined automatically.

-o file
    puts output in file. Default output is stdout

-p k
    Except for the force-directed method, bundling minimizes $ink * (k - cos(turning angle))$. The larger the value of k, the less emphasis is put on avoiding sharp turning angles and the faster the bundling. The default value is -1.

-r k
    is a non-negative integer giving the maximum recursion level used in the agglomerative method. The default is 100.

-T fmt
    specifies the output format. At present, the output is always in the DOT format. If fmt is "simple", the output is a simple, schematic representation of the drawing. Only the node positions and edges are retained from the original graph. If fmt is "gv", the drawing information is attached to the input graph.

-v k
    determines the verbose level used for tracing the algorithm. The value k is optional; if not provided, the value 1 is used.

-?  Print usage and exit.

BUGS
At present, mingle does not handle graphs with loops or directed multiedges. So, a graph with edges a -> b and b -> a is acceptable, but not if it has edges a -> b and a -> b or a -- b and a -- b.

AUTHOR
Emden R. Gansner <erg@graphviz.org>, Yifan Hu <yifanhu@yahoo.com>

SEE ALSO

sfdp(1), neato(1), gvpr(1)

Emden R. Gansner, Yifan Hu, Stephen C. North and Carlos Scheidegger, ``Multilevel Agglomerative Edge Bundling for Visualizing Large Graphs'', IEEE Pacific Visualization Symposium PacificVis, pp. 187-194, 2011.