Download Shareware and Freeware Software for Windows, Linux, Macintosh, PDA

line Home  |  About Us  |  Link To Us  |  FAQ  |  Contact

Serving Software Downloads in 976 Categories, Downloaded 29.545.453 Times

Q-Graph 1.4

  Date Added: January 18, 2010  |  Visits: 1.029

Q-Graph

Report Broken Link
Printer Friendly Version


Product Homepage
Download (91 downloads)



Q-Graph is a collection of Q scripts that provide a graph data structure and a full-featured graph editor (the latter requires Tcl/Tk). Q-Graph library can be used to implement and test graph algorithms using the Q language. Q is a functional programming language based on term rewriting. Thus, a Q program or "script" is simply a collection of equations which are used to evaluate expressions in a symbolic fashion. The equations establish algebraic identities and are interpreted as rewriting rules in order to reduce expressions to "normal forms". For instance, here is how you define a function sqr which squares its argument by multiplying it with itself: sqr X = X*X; Note that, as in Prolog, capitalized identifiers are used to indicate the variables in an equation, which are bound to the actual values when an equation is applied. Equations may also include a condition part, as in the following definition of the factorial function: fact N = N*fact (N-1) if N>0; = 1 otherwise; Functions on structured arguments are defined by "pattern matching". E.g., the product of a list (denoted in Prolog-like syntax) can be computed with these two equations: prod [] = 1; prod [X|Xs] = X*prod Xs; With this definition, the factorial can now also be defined as follows (the notation [1..N], as in Haskell, denotes an arithmetic sequence): fact N = prod [1..N]; As you can see, the definitions are really just like mathematical equations. The syntax is superficially similar to other modern functional languages like Miranda and Haskell, except that Q is "free-format", i.e., it does not use layout to indicate syntactical structure (thus the semicolon is used to terminate an equation). Due to its term rewriting heritage, Q goes well beyond most other functional languages in that it also allows you to perform computations with symbolic expressions. For instance, with the definition of the sqr function from above, you will find that sqr (X+1) evaluates to (X+1)*(X+1). This might first look like an arcane feature, but it is actually quite useful, because you can try your definitions with symbolic inputs, too..

Requirements: No special requirements
Platforms: Linux
Keyword: Collection Data Structure Graph Graph Data Graph Data Structure Libraries Programming Qgraph Structure Used To
Users rating: 0/10

License: Freeware Size: 87.04 KB
USER REVIEWS
More Reviews or Write Review


Q-GRAPH RELATED
Programming  -  trialCODE 8
Trial Criteria Online Data Entry (trialCODE): a Java-based user interface that codifies eligibility requirements used to automate the screening of potential subjects to clinical trials. Used for caMATCH screening engine on BreastCancerTrials.org...
1.39 MB  
Libraries  -  GraphViz::Data::Structure 0.15
GraphViz::Data::Structure can visualise data structures. SYNOPSIS use GraphViz::Data::Structure; my $gvds = GraphViz:Data::Structure->new($data_structure); print $gvds->graph()->as_png; This module makes it easy to visualise data...
40.96 KB  
Libraries  -  GD::Graph 1.4308
GD::Graph is a graph plotting module for Perl 5. SYNOPSIS use GD::Graph::moduleName; GD::Graph is a perl5 module to create charts using the GD module. The following classes for graphs with axes are defined: GD::Graph::lines Create a line...
143.36 KB  
Libraries  -  Bio::Graph::SimpleGraph 1.5.2_102
Bio::Graph::SimpleGraph is a Perl module that can create and manipulate undirected graphs. SYNOPSIS use Bio::Graph::SimpleGraph; my $graph=new SimpleGraph; # read pairs of nodes from STDIN while ( ) { my($node1,$node2)=split;...
5.6 MB  
Libraries  -  Data::Dumper 2.121
Data::Dumper module contains stringified perl data structures, suitable for both printing and eval. SYNOPSIS use Data::Dumper; # simple procedural interface print Dumper($foo, $bar); # extended usage with names print...
31.74 KB  
Libraries  -  Common Data Format 3.1
Common Data Format is a self-describing data abstraction for the storage and manipulation of multidimensional data in a platform- and discipline-independent fashion. It consists of a scientific data management package (known as the "CDF...
1.5 MB  
Libraries  -  Graph::Writer::TGXML 0.01
Graph::Writer::TGXML is a Perl module used to write out directed graph as TouchGraph LinkBrowser XML. SYNOPSIS use Graph; use Graph::Writer::TGXML; $graph = Graph->new(); # add edges and nodes to the graph $writer =...
4.1 KB  
Libraries  -  Data::Startup 0.04
SYNOPSIS ###### # Subroutine interface # use Data::Startup qw(config override); $options = override(%default_options, @option_list ); $options = override(%default_options, @option_list ); $options = override(%default_options, %option_list...
74.75 KB  
Libraries  -  Chart::GRACE 0.95
Chart::GRACE is a Perl object for displaying data via Xmgrace. SYNOPSIS use Chart::GRACE; xmgrace($a, { SYMBOL => plus}; use Chart::GRACE (); $grace = new Chart::GRACE; $grace->plot($pdl); xmgrace($pdl, { LINESTYLE => dotted });...
8.19 KB  
Libraries  -  PHP Advanced Graphing Class 1.4
PHP Advanced Graphing Class is a PHP class that can be used to generate line, bar, and 2D/3D pie graphs from multiple data sets. PHP Advanced Graphing Class offers many style and data formatting options. The graphs can be built from data defined...
 
NEW DOWNLOADS IN PROGRAMMING, LIBRARIES
Programming  -  FLEX-db Digital Asset Manager 3.0.9
FLEX-db - an enterprise Digital Asset Manager (DAM). It ingests and links metadata with files, creates thumbnails, and processes files using business rules. FLEX-db has a JSP client, Java app server for file input and output and an EJB metadata...
21.57 MB  
Programming  -  Libicom 0.9.0
The libicom library is a character based dynamicly linked library for Linux. It is used to remotely control the Icom IC-R8500 wide band receiver via an RS232 link. All call and return parameters to the control functions are character string based....
20.48 KB  
Programming  -  dotdesktop 0.3
Dotdesktop library provides ability to parse desktop entry file and access the information in a convenient way. Desktop entry file format is defined by freedesktop.org, it is used to describe information about an application such as the name and...
327.68 KB  
Programming  -  Cedalion for Linux 0.2.6
Cedalion is a programming language that allows its users to add new abstractions and define (and use) internal DSLs. Its innovation is in the fact that it uses projectional editing to allow the new abstractions to have no syntactic limitations.
471.04 KB  
Programming  -  libyasl 0.2
Libyasl is a C++ class library to easily realize TCP/UDP/Multicast clientsand servers in IPv4 and IPv6 environments under GNU/Linux systems.
143.36 KB  
Libraries  -  EuGTK 4.8.9
Makes it easy to develop good- looking, fast, cross-platform programs that run on Linux, OS X, and Windows. Euphoria is a very fast interpreted/compiled language with straight-forward syntax. EuGTK allows programming in a clean, object-oriented...
10.68 MB  
Libraries  -  Linux User Group Library Manager 1.0
The LUG Library Manager is a project to help Linux User Groups start their own library. A LUG library is helpful to the community at large because it increases access to information, and gives everyone the opportunity to become more knowledgeable.
5.35 KB  
Libraries  -  Module::MakefilePL::Parse 0.12
Module::MakefilePL::Parse is a Perl module to parse required modules from Makefile.PL. SYNOPSIS use Module::MakefilePL::Parse; open $fh, Makefile.PL; $parser = Module::MakefilePL::Parse->new( join("", ) ); $info = $parser->required;...
8.19 KB  
Libraries  -  sqlpp 0.06
sqlpp Perl package is a SQL preprocessor. sqlpp is a conventional cpp-alike preprocessor taught to understand SQL ( PgSQL, in particular) syntax specificities. In addition to the standard #define/#ifdef/#else/#endif cohort, provides also...
10.24 KB  
Libraries  -  App::SimpleScan::Substitution::Line 2.02
App::SimpleScan::Substitution::Line is a line with optional fixed variable values. SYNOPSIS my $line = App::SimpleScan::Substitution::Line->new(" this "); # Use only this value when substituting " ". $line->fix(substituite =>...
54.27 KB