Gephi.org | Download Gephi | Blog | Gephi Store | Wiki | Forum | Support | Bugtracker

Look for Gephi Plugins

Popular Keywords

Close Search

DAG Layout

DAG Layout
4 votes, 5.00 avg. rating (97% score)

Introduction

Simple Layout for directed acyclic graphs (DAGs).

Plugin Owner’s Notes

The nodes are arranged in discrete layers so that the edges will always point downwards (if no loop exists). The nodes are arranged as far to the top as possible, minimizing the number of layers used. The horizontal layout is done by assigning the nodes to discrete slots in each layer (the biggest layer defines the number of availabe slots for each layer). While running, slots are chosen randomly and swapped if this would make the edges shorter to generate a more compact graph. These optimizations are only local and will not generate an overall opimal layout.

Expected input:

DAG (directed acyclic graph, a directed grah without loops)
If the graph contains loops, it is treated as a DAG as far as possible and all “leftover” edges are ignored. Which edges in circles are ignored may be different on each run because of the randomization in the initialization phase.

Known issues:

Sometimes, the layout refuses to optimize the order of the nodes in the layers. Restart gephi in this case.

Similar Plugins

Random 3D Layout

A simple layout plugin that places nodes randomly within a 3D space. Each node is given an x, y, and z. While normally this Z is not seen in the 2D Gephi view, it is used by other 3D algorithms (like Force Atlas 3D) and can be exported.

More Info

Event Graph Layout

Description The event graph layout plugin was written to allow for the easy creation of event graphs. In an event graph the nodes represent events and the edges/arcs represent relationships between the events (e.g. causality). The layout plugin places the events in a user-specified order on the x-axis. If vertical force is activated, the plugin [...]

More Info

Layered Layout

This plugin provides layout, where nodes are in different layers (orbits). Assignment of node to layer depends on the value of numerical attribute of node. This layout can very nicely visualize the “Small-World Phenomenon”, where the layer assignement depends on the distance between key node and the others (Erdös number in the SNA Metrics Plugin).

More Info