OVERVIEW

Graph Preprocessing Toolbox (GPT) : Some useful tools for preprocessign graph data

CONTAINS

1. Add one (--add_one): Simply adds 1 to indices of nodes that are enumerated from 0 to N-1 (e.g., Enron graph)

2. Enumerate nodes (--enum_nodes): Uses dictionary to enumerate N nodes who are defined by arbitrary IDs (e.g., CA-CondMat graph) with unique numbers between 1 and N. Enumeration happens with order of parsing.

3. Compare graphs (--compare): Compares two (enumerated) graphs that have the same set of nodes. Usefull for determining the connectivity changes that occur on time evolving graphs (e.g., vk2016 and vk2017 graphs). Takes as input the initial graph (--graph_before) and graph after changes have occured (--graph_after). Results are stored in user-defined directory (--cmp_out) as 3 .txt files:

   • cmp_out/added_links.txt: Contains edges that are in --graph_after but not in --graph_before.
   • cmp_out/removed_links.txt: Contains edges that are in --graph_before but not in --graph_after.
   • cmp_out/unchanged_links.txt: Contains edges that are present both in both--graph_after and --graph_before.

INPUT FORMAT

ARGUMENTS

Command line optional arguments with values:

ARGUMENT	VALUES	DEFAULT	DESCRIPTION
--graph_file	-	CA-cond.txt	input file
--outfile	-	out/adj_enum.txt	output file
--ind_list	-	out/ind_list.txt	strores map of new indexes (1 to N) to old (values)

Default values can be changed by editing defs.h

Command line optional arguments without values:

ARGUMENT	RESULT
--in_place	overwrites output on input file