First steps with R

by Donato Teutonico | July 2013 |

In this article created by Donato Teutonico, the author of  Instant R Starter, we will learn the features of R. R is a high-level language and an environment for data analysis and visualization. It provides an environment in which you can perform statistical analysis and produce high-quality graphics. It is actually a complete programming language, derived from the statistical programming language S. It has been developed and is maintained by a core of statistical programmers, with the support of a large community of users. It is most widely used for statistical computing and graphics, but is a fully functional programming language well suited to scientific programming, data management and data visualization in general.

The interaction with the R system is mainly command-driven, with the user typing in text and asking R to execute the specific command. As soon as you start R, a session will be opened, on which the commands may be introduced and the expression executed. Complex procedures can be implemented in scripts, which are executed as soon as they are loaded into the system or, more efficiently, as function, which can be loaded in the system and used when needed.

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First Steps

by Alexandre Devert | March 2014 | Cookbooks Open Source

In this article by Alexandre Devert, author of matplotlib Plotting Cookbook, we will cover the following topics:

• Installing matplotlib
• Plotting one curve
• Using NumPy
• Plotting multiple curves
• Plotting curves from file data
• Plotting points

matplotlib makes scientific plotting very straightforward. matplotlib is not the first attempt at making the plotting of graphs easy. What matplotlib brings is a modern solution to the balance between ease of use and power. matplotlib is a module for Python, a programming language. In this article, we will provide a quick overview of what using matplotlib feels like.

Finishing Touches and Publishing

by Damien Bruyndonckx | February 2014 | Open Source

This article by Damien Bruyndonckx, the author of the book Mastering Adobe Captivate 7, concentrates on publishing a movie. It is the process by which you make your Captivate projects available to the outside world. Most of the time, you'll publish your movies in the Adobe Flash format or the HTML5 format so that any student can enjoy the content of your online course across devices.

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Fine-tuning the SQL Server database for Dynamics NAV

by Amit Sachdev Sharan Oberoi | September 2010 | Enterprise Articles Microsoft

Before we discuss about fine-tuning the performance of the database for Dynamics NAV, it is important to discuss some key features of the Dynamics NAV application that comprise the core architecture of the application, and the majority of performance issues could be attributed to improper use or misuse of these features.

In this article, by Sharan Oberoi & Amit Sachdev, authors of Microsoft Dynamics NAV Administration, we will cover:

• SIFT
• Using indexes/keys in Dynamics NAV
• Investigating the performance of the database
• Updating statistics
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Fine Tune the View layer of your Fusion Web Application

by Jobinesh Purushothaman | July 2010 | Enterprise Articles Java Oracle

Oracle Application Development Framework (ADF) is an end to end enterprise application development framework built on Java and Java Platform Enterprise Edition (Java EE) technology stack. This is based on standard patterns and proven technologies, built with a motive of simplifying the technology complexity. Oracle ADF follows Model-View-Controller design (MVC) pattern, by adding definite roles to each layer.

A 'Fusion Web Application' is an enterprise web application built using ADF Faces for the view, ADF Model for data binding, and ADF Page Flow for the controller and ADF Business Components for business services. This article by Jobinesh Purushothaman, discusses basic guidelines on how to improve the performance and scalability of the view layer of a Fusion Web Application.

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Finding and Fixing Joomla! 1.5x Customization Problems

by Daniel Chapman | August 2009 | Joomla! Open Source Web Development

The more complex we make our site, the more likely it is that some sort of problem will occur. Because of this, it is vitally important for every one of us to get at least a basic understanding of how to diagnose, and preferably solve, any problems or bugs that we come across when building our site. Before we look at how to do that, we will cover some of the most common problems we may encounter when building and customizing our Joomla! sites, and why they occur. In this article by Daniel Chapman, we will be covering:

• Understanding common errors
• Common PHP related errors
• Common JavaScript related errors
• Common Server related errors
• Hacking the Joomla! core—consequences and considerations
• Getting Support—how to and etiquette
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Find closest mashup plugin with Ruby on Rails

by Chang Sau Sheong | January 2009 | Open Source

In this article by Chang Sau Sheong we will explore the 'Find closest' mashup plugin and map a fleet of kiosks in an online map. This mashup plugin allows your Rails website or application to have an additional feature that allows your users to find the location of the closest facility from a particular geographic location based on a specified search radius. This mashup plugin integrates with your existing website that has a database of locations of the facilities.

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Find and Install Add-Ons that Expand Plone Functionality

by Steve McMahon | June 2010 | Content Management Open Source Web Development

Plone has a rich feature set and meets many needs without additional components. But you may add new features and meet many special needs by installing add-on components called products.

This article by Steve McMahon, co-author of Practical Plone 3: A Beginner's Guide to Building Powerful Websites, shows how to find and select add-on products for Plone. We’ll also learn how to install them, and review some of the best and most commonly used products.

Finally Breakfree: Read Anytime! Anywhere! Anyhow!

by | May 2011 |

This month we are pleased to announce an exclusive offer on all print books from Packt. You will be delighted to know that now you can buy any print book of your choice and get that ebook absolutely free. That’s not all. In addition to this you also get free access to that book on PacktLib absolutely free.

This is a limited period offer. Grab your copies now!

To make it easier for you to buy the books on your favorite technologies, we have handpicked some of the most popular books from Packt. Or else simply browse through our collection of books to pick your favorite copies: A-Z List Of Books

Filtering in Microsoft® Dynamics™ NAV

by David A. Studebaker | October 2007 | .NET Microsoft

Filtering is one of the very powerful tools within NAV C/AL. Filtering is the application of defined limits on the data to be considered in a process. Filter structures can be applied in at least three different ways, depending on the design of the process.

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File Sharing in Grails

by Jon Dickinson | May 2009 | Java Open Source Web Development

Besides posting messages, our users also want to be able to upload files to share with other members of their team. Sounds good! But wait a minute, isn't file uploading a bit of a pain? First of all, we need to read the binary file data off the request, and then we need to figure out where to put the file. Do we store it on the file system, or in a database? Well, let's take a look.

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File Information in Perforce CRM

by Neal Ralph Firth Robert Cowham | September 2013 | Enterprise Articles

In this article by Robert Cowham and Neal Ralph Firth, authors of the book Learning Perforce CRM, we will explain regarding the file information. File information is the key to understanding the history of a repository, how a code base or set of files has evolved, and what is happening to it now.

File information is exposed in many parts of the P4V interface. In this article, we will cover how to make the most efficient use of the Perforce reporting commands to examine the information associated with a file. More importantly, we'll explain how to interpret this information to maximize the value it provides you.

• Properties of files
• File versions and their relationship to changelists
• Finding files in the repository
• The many ways of referencing file versions
• Comparing different versions of files and folders
• Examining how file content has evolved over time
• Perforce file types and how they impact usage and workspaces
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Festive Offer

by | January 2011 |

This festive season Packt is pleased to announce a special offer on all Open Source eBooks. You will be delighted to know that now you can choose any 5 Open Source eBooks from a collection of over 500 innovative books at an unbelievable price of just \$40 / £25 / €30.

Browse through our collection of books to pick your favorite copies: A-Z List Of Books

This is a limited period offer. Grab your copies now!

Feeds in IBM Lotus Notes 8.5

by Karen Hooper | August 2010 | Enterprise Articles IBM

In this article, by Karen Hooper, author of IBM Lotus Notes 8.5,we will delve into what a feed is and how to set them up in Lotus Notes. We will also look at how to view feeds. Then we will see how to set up our feeds so that we always receive the latest content from the websites we are interested in.

• What are feeds
• Viewing feeds
• How to manage our feeds
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by Dr Mark Alexander Bain Hasin Hayder | July 2009 | MySQL Open Source PHP

Feeds are a very important part of Facebook Applications. They are used to publish notifications and news in a user's profile. So, feeds are the best way to keep the friends of the users up-to-date about the user's current activities. Feeds are also a great way to publicize your applications, if you know what I mean.

In this article by Dr. Mark Alexander Bain and Hasin Hayder, we will go into the details of managing feeds (both news feed and mini feed) using Facebook REST APIs. The following sections will help you understand what the major differences between these two types of feed are, and how to use them properly in your application.

Fedora 8 — More than a Linux Distribution

by Mayank Sharma | November 2007 | Linux Servers Open Source

One of the most popular free-as-in-freedom Linux distribution, Fedora Linux, released its latest version, Fedora 8, earlier in November. In addition to being a fantastic release, Fedora's user and development community and a clear headed approach makes Fedora 8 much more than a Linux distribution.

Like most major Linux distros Fedora too has development goals for releases. Since many top Fedora leaders are employed by RedHat, the development priorities tend to intertwine with the company's RedHat Enterprise Linux.

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Features of uTorrent

by Adrian Hewitt | October 2013 | Open Source

In this article by Adrian Hewitt, the author of Instant uTorrent, we will teach you all about the most commonly performed tasks and most commonly used features in uTorrent.

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Features of uTorrent

by Adrian Hewitt | October 2013 | Web Graphics & Video

Features of uTorrent

In this article by Adrian Hewitt, the author of Instant uTorrent, we will teach you all about the most commonly performed tasks and most commonly used features in uTorrent.

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Features of RaphaelJS

by A.Krishna sagar | September 2013 | Open Source

RaphaelJS is a vector graphics library, which is used to draw objects in the browser. As you learn to use RaphaelJS, you will realize that there are a plethora of things you can do with it. In this article by A. Krishna sagar, the authors of Instant RaphaelJS Starter, we will cover the most commonly performed tasks and most commonly used features in RaphaelJS.

• Create a Raphael element
• Manipulate the style of the element
• Transform the element
• Perform animations on the element
• Add JavaScript events to the element
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Features of CloudFlare

by Jeff Dickey | September 2013 | Open Source

The article, Features of CloudFlare, helps you learn the basics of CloudFlare to make your site perform faster. This article by Jeff Dickey, author of the book Instant CloudFlare Starter, explains about the some of the security features that CloudFlare provides to make your website much more secure.

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