1 /* -*- mode: C++; indent-tabs-mode: nil; -*-
3 * This file is a part of LEMON, a generic C++ optimization library.
5 * Copyright (C) 2003-2010
6 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
7 * (Egervary Research Group on Combinatorial Optimization, EGRES).
9 * Permission to use, modify and distribute this software is granted
10 * provided that this copyright notice appears in all copies. For
11 * precise terms see the accompanying LICENSE file.
13 * This software is provided "AS IS" with no warranty of any kind,
14 * express or implied, and with no claim as to its suitability for any
21 [PAGE]sec_tools[PAGE] Tools
23 \todo This page is under construction.
25 [SEC]sec_aux_structures[SEC] Auxiliary Data Structures
26 Graph algorithms depend on various auxiliary data structures and algorithms.
27 For example, heaps play an important role in Dijkstra and Prim
28 algorithms, both the theoretical and practical performance of them
29 are determined by the applied heap implementation.
31 LEMON implements various such auxiliary tools. For instance,
32 several data structures are available for maintaining \e disjoint \e sets.
33 \ref UnionFind is the classical union-find data structure, which is
34 used to implement the \ref Kruskal algorithm.
35 The \ref UnionFindEnum and \ref HeapUnionFind classes are used in
36 matching algorithms, the first one supports the enumeration of the
37 items stored in the sets, while the second one also assigns priorities to the
38 elements and an item having minimum priority can be retrieved set-wise.
41 [SEC]sec_graph_to_eps[SEC] Postscript Exporting
43 Another nice feature of the library is \ref graphToEps(), a highly
44 configurable graph displaying tool (using EPS output format).
45 Originally, it was developed to evaluate the flexibility and scalability
46 of LEMON's approach to implement named parameters. Later it
47 has been evolved into a versatile tool featuring above 35 named
48 parameters. The following code demonstrates its typical use.
51 graphToEps(g, "graph.eps")
53 .title("Sample EPS figure")
54 .copyright("(c) 2003-2010 LEMON Project")
55 .absoluteNodeSizes().absoluteArcWidths()
56 .nodeScale(2).nodeSizes(sizes)
58 .nodeColors(composeMap(palette, colors))
59 .arcColors(composeMap(palette, acolors))
60 .arcWidthScale(.4).arcWidths(widths)
61 .nodeTexts(id).nodeTextSize(3)
65 Using this feature, various nice images can be generated from graphs,
68 \image html graph_to_eps.png
71 [SEC]sec_time_count[SEC] Time Measuring and Counting
76 [SEC]sec_random[SEC] Random Number Generation
81 [SEC]sec_arg_parser[SEC] Argument Parser