DrawGViz

DrawGViz(Layout, PltFNm, Desc, NodeLabelH)

A graph method to draw a given graph using a selected GraphViz Layout engine with nodes labeled. Creates a file with name PltFNm.

Parameters:

• Layout: TGVizLayout

  One of gvlDot, gvlNeato, gvlTwopi, gvlCirco, gvlSfdp. The type of layout for the graph.

• PltFNm: string

  Output filename (extension .ps, .png, .gif) determines the output format.

• Desc: string

  A string describing the visualization.

• NodeLabelH: Python dictionary or TIntStrH, a hash table of int keys and string values

  Maps node ids to node labels.

Return value:

• None

The following example shows how to draw the graph for TNGraph, TUNGraph, and TNEANet:

import snap

Graph = snap.GenRndGnm(snap.TNGraph, 10, 50)
labels = {}
for NI in Graph.Nodes():
        labels[NI.GetId()] = str(NI.GetId())
Graph.DrawGViz(snap.gvlDot, "output.png", " ", labels)

UGraph = snap.GenRndGnm(snap.TUNGraph, 10, 50)
labels = {}
for NI in UGraph.Nodes():
    labels[NI.GetId()] = str(NI.GetId())
UGraph.DrawGViz(snap.gvlDot, "output.png", " ", labels)

Network = snap.GenRndGnm(snap.TNEANet, 10, 50)
labels = {}
for NI in Network.Nodes():
    labels[NI.GetId()] = str(NI.GetId())
Network.DrawGViz(snap.gvlDot, "output.png", " ", labels)