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Yahoo! Design Pattern Library |
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5839 clicks since Feb 15, 2006
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We have bundled the Yahoo! design patterns with pointers to related code from the Yahoo! User Interface Code Library. We hope this is a useful resource and look forward to your feedback. |
Top > Design
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Java Distribution Functions |
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3543 clicks since Oct 19, 2003
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A translation of the R distribution functions from C to Java. The translation isn't entirely pretty (especially since some of the C code was originally translated from Fortran), but it seems to work. Classes implement the PDF, CDF, and (usually) quantile and random variate generation for the following distributions: beta, hypergeometric, normal, binomial, logistic, poisson,
cauchy, lognormal, signrank,
chisquare, negative_binomial, t,
exponential, noncentral_beta, tukey,
f, noncentral_chisquare, uniform,
gamma, noncentral_f, weibull,
geometric, noncentral_t, wilcox |
Top > Math > Statistics
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Ming - an SWF output library and PHP module |
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3079 clicks since Jun 18, 2003
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Ming is a c library for generating SWF ("Flash") format movies, plus a set of wrappers for using the library from c++ and popular scripting languages like PHP, Python, and Ruby. |
Top > PHP > Extensions
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Matran: A Matrix Wrapper for Fortran 95 |
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3040 clicks since Jun 18, 2003
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Matran (pronounced MAY-tran) is a Fortran 95 wrapper that implements matrix operations and computes matrix decompositions using Lapack and the Blas. Although Matran is not based on a formally defined matrix language, it provides the flavor and convenience of coding in matrix oriented systems like Matlab, Octave, etc. By using routines from Lapack and the Blas, Matran allows the user to obtain the computational benefits of these packages with minimal fuss and bother. |
Top > Math > Algebra
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Metamath Home Page |
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3005 clicks since Jun 28, 2003
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Contains images you can use in web pages when discussing math. Lots of neat stuff. |
Top > Math
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JMathLib: Java Mathematical Evaluation Library |
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2739 clicks since Jun 14, 2003
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A library of mathematical functions designed to be used in evaluating complex expressions and display the results graphically. It will be used either interactively through a terminal like window or to interpret script files.
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Top > Math
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A Brief Introduction to Graphical Models and Bayesian Networks |
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2528 clicks since Oct 19, 2003
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The tutorial begins with this quote:
<p>
"Graphical models are a marriage between probability theory and graph theory. They provide a natural tool for dealing with two problems that occur throughout applied mathematics and engineering -- uncertainty and complexity -- and in particular they are playing an increasingly important role in the design and analysis of machine learning algorithms. Fundamental to the idea of a graphical model is the notion of modularity -- a complex system is built by combining simpler parts. Probability theory provides the glue whereby the parts are combined, ensuring that the system as a whole is consistent, and providing ways to interface models to data. The graph theoretic side of graphical models provides both an intuitively appealing interface by which humans can model highly-interacting sets of variables as well as a data structure that lends itself naturally to the design of efficient general-purpose algorithms.
</p>
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Many of the classical multivariate probabalistic systems studied in fields such as statistics, systems engineering, information theory, pattern recognition and statistical mechanics are special cases of the general graphical model formalism -- examples include mixture models, factor analysis, hidden Markov models, Kalman filters and Ising models. The graphical model framework provides a way to view all of these systems as instances of a common underlying formalism. This view has many advantages -- in particular, specialized techniques that have been developed in one field can be transferred between research communities and exploited more widely. Moreover, the graphical model formalism provides a natural framework for the design of new systems." --- Michael Jordan, 1998.
</p>
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Top > Math > Graph Theory
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AVG FREE Edition |
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2501 clicks since Nov 29, 2003
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The AVG Free Edition is fully featured anti-virus software with the following restrictions: Basic user Interface only, Disabled Advanced Scheduling of Tests, Disabled Creating of Your Own Tests
NO TECHNICAL SUPPORT. Other than that, it is a good free anti-virus program.
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Top > Security
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Creating and using a timing class |
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2436 clicks since Feb 8, 2004
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The purpose of this tutorial is to talk about two seperate concepts; profiling and object oriented programming (OOP). In this tutorial we'll create a simple class to allow you to create one or more timers. You can then use these timers to show you how long a script or function takes to run, which can help you determine what portions of your script are eating up the most processing time. This is sometimes referred to as profiling. You can also use timer objects to provide generic timer display in your scripts.
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Top > PHP
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Resize a Popup to Fit an Image's Size |
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2333 clicks since Feb 26, 2003
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If you're a Webmaster who has to deal with image galleries, then make a note of this clever script. It gives you a solution to a very common problem -- how to resize a popup window to fit the image sizes displayed in it. The script works in NS 4/5/6/7 and IE 4/5/6. |
Top > Javascript
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An introduction to MySQL permissions - MySQL newbies often have problems with the MySQL access control system. But once you get used to it, I think you will find it flexible and easy to use, so this month we\'re going to examine how to get started with MySQL permissioning.
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Better Search Engine Design: Beyond Algorithms [Aug. 21, 2003] - A useful search engine is more than a search algorithm. This article explains how to create a search query analysis tool, a best bets feature, and a basic controlled vocabulary. We\'ll use MySQL for the examples.
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Emulating Analytic (AKA Ranking) Functions with MySQL - One of the most hailed extensions brought to SQL in recent years has been these functions that Oracle calls analytic functions, DB2 calls OLAP functions, and SQL Server 2005 calls ranking functions--but which MySQL, so far, still lacks. The good news is that they can be (relatively) easily and efficiently emulated. |
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MySQL Consulting - Being on your own - About half a year have passed since me and Vadim have left MySQL to do MySQL Consulting on our own. Bunch of people have been wondering about our experiences so I thought it would be worth to share it here. |
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MySQL Stored Procedures: Part 1 - MySQL 5.0 finally introduces functionality for Stored Procedures. So what exactly are stored procedures? That is the kind of question that gets database professionals who use other DBMS\'s raising their eyebrows. Stored procedures have been integral to Oracle, PostgreSQL, DB-2, MS-SQL server and others for years, and it has long been a sore point that MySQL has not had them. But there is no snobbery here - if you are a MySQL newbie, or have been using MySQL for years and want to find out what all the fuss is about, read on. |
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MySQL Sub-Queries - One feature that MySQL has been lacking is the ability to do sub-queries. Sub-queries are queries that are run within other queries. They are executed before the primary or outer query and their results may be incorporated into the main query. MySQL\'s inability to perform sub-queries has long been a feature that has been used against it when compared to other SQL databases. As of version 4.1 of MySQL, however, sub-queries are now possible. I will explore how to use sub-queries in MySQL.
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MySQL--Yesterday\'s Toy, Tomorrow\'s Contender - This article is a roadmap showing you the new features already implemented, and those still to come. |
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MySQL4.x - A look at some of the great new features coming in MySQL 4.x. |
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Pitfalls of Transactions with PHP - Initially, the MySQL DBMS did not support transactions. As of version 3.23-max, MySQL supports transactions with two additional table types, InnoDB and BDB. InnoDB is recommended for its CPU efficiency and support of row-level and multiple-concurrency locking. Now that MySQL has full transaction support, PHP developers need to incorporate them effectively. |
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Sorting by day of week - Section from Paul Dubois\'s book on MySQL dealing with how to sort all your dated entries by the day of the week they occur in (ignoring the year and month). Useful for \"this day in history\" type content. |
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Temporal Functionality - Many changes have been made to temporal — DATE, TIME, DATETIME, and TIMESTAMP — functions in MySQL 4.1. This includes support for microseconds and time zones. In this article, a time value is one of either: TIME, DATETIME, or TIMESTAMP. A date value is one of either: DATE, DATETIME, or TIMESTAMP. A datetime value is one of any of the date or time value types. |
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Transferring Data to MySQL Using SQLyog - Discusses how you can use SQLyog OBDC Import Tool to transfer data from an OBDC compliant database to MySQL.
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Using MySQL Programs - This chapter provides a brief overview of the programs provided by MySQL AB and discusses how to specify options when you run these programs. |
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Using Subqueries In MySQL (part 1) - One of the newest features in MySQL, and one of its most eagerly-anticipated ones, is subqueries. Subqueries have been on the MySQL wishlist for a while; they\'ve finally made an appearance in MySQL 4.1. This two-part tutorial introduces you to subqueries. |
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A Small, Portable 3D Engine |
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Jul 19, 2007 6:54 am
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This article will describe the evolution of my engine from a sample program to a full library of portable software rendering functions, and document this library, called pGL (portable GL). The library interface is based on OpenGL (as much as a set of TI-85 programs can be based on C), because it is very simple and easy to use. |
Top > Math > Geometry
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FONTMASTER.COM - Fonts To Download Free |
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Jul 13, 2007 11:41 pm
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Here at Fontmaster.com you will find hundreds of fonts to download free that are free to use royalty free. |
Top > Fonts
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YoLinux: Linux Fonts |
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Jul 13, 2007 12:04 pm
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Useful general tutorial on fonts under linux. Useful links and installation notes.
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Top > Sys Admin
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DeGraeve.com - The Projects of Steven DeGraeve |
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Jun 7, 2007 9:49 am
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The goal of DeGraeve.com is to provide free, high-quality, web-based tools that are easy to use for all users.
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Top > Web Development
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Perl Circus - Perl Tricks, Tips And Traps. |
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Jun 7, 2007 9:44 am
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Perl Circus has been serving up fresh buttered Perl tricks since 2001. |
Top > Perl
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Dedicated Server Setup Checklist |
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May 28, 2007 4:25 pm
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You’ve outgrown shared hosting and decided to start renting a server of your own. Since you’re still on a tight budget, you want an unmanaged server, where full responsibility for configuring and managing the server is yours. These are the steps I go through every time I set up a new server for web and database hosting. |
Top > Sys Admin
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Online Mathematics: Scalable Vector Graphics |
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May 6, 2007 10:50 am
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Scalable Vector Graphics (SVG) is the open source Worldwide Web Consortium (W3C) recommendation for two dimensional vector graphics. The combination of SVG and JavaScript is a powerful platform for creating interactive graphics, comparable to Flash and Java. SVG has been overlooked, however, partly because of incomplete browser support. This situation improved significantly in 2006 with the release in of Firefox 1.5 and Opera 9, both with native SVG capability. The first part of this article reviews the current status of SVG implementation and offers several examples with a mathematical flavor. The second part, for developers, explains one of the examples in detail. |
Top > SVG
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SVG Authoring Guidelines |
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May 6, 2007 10:49 am
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There are a lot of mistakes in the SVG documents currently found on the Web. It is important that these problems are addressed as soon as possible to prevent them from propagating into authoring tools and the SVG documents that people will write in the future. |
Top > SVG
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Five Basic Mistakes Not to Make in DNS |
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May 5, 2007 6:47 pm
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Here are five things you can do to make sure your DNS is in good shape and not causing problems for the rest of the Internet, which, by the way, also includes you. |
Top > Sys Admin > DNS
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Gaffer on Games |
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May 5, 2007 1:09 am
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Popular series of articles on game physics. |
Top > Games
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