22 free tools for data visualization and analysis You may not think you've got much in common with an investigative journalist or an academic medical researcher. But if you're trying to extract useful information from an ever-increasing inflow of data, you'll likely find visualization useful -- whether it's to show patterns or trends with graphics instead of mountains of text, or to try to explain complex issues to a nontechnical audience. There are many tools around to help turn data into graphics, but they can carry hefty price tags. The cost can make sense for professionals whose primary job is to find meaning in mountains of information, but you might not be able to justify such an expense if you or your users only need a graphics application from time to time, or if your budget for new tools is somewhat limited. If one of the higher-priced options is out of your reach, there are a surprising number of highly robust tools for data visualization and analysis that are available at no charge. Data cleaning
Get to know Firebird in two minutes Introduction If you are reading this paper, this is probably your first encounter with the Firebird RDBMS. This paper will present to you the main features of the Firebird database. The top 20 data visualisation tools One of the most common questions I get asked is how to get started with data visualisations. Beyond following blogs, you need to practise – and to practise, you need to understand the tools available. In this article, I want to introduce you to 20 different tools for creating visualisations: from simple charts to complex graphs, maps and infographics. Almost everything here is available for free, and some you have probably installed already. Advertisement
The Beginner's Guide to Instagram Update: This post was updated November 2013 to reflect current statistics and tools. Even if you don't use Instagram, we're guessing you've encountered an Instagram image somewhere on the web — even if you didn't realize it. Instagram's calling card is the photo filter, a digital layer that, when added to a standard photo, gives it the appearance of professional editing. Some filters enhance the colors in a photo, while other dull the light to a soft glow for an aged, vintage appearance. 21 Top Presentation Tools for Teachers - More Than A Tech For years, PowerPoint reigned supreme as presentation software of choice for just about everyone, including teachers and students. In recent years though, upstarts like Prezi showed us that there was more than one way to move through traditional slides. We complied a list of 21 of the best presentation apps for educators.
PostgreSQL: About PostgreSQL is a powerful, open source object-relational database system. It has more than 15 years of active development and a proven architecture that has earned it a strong reputation for reliability, data integrity, and correctness. It runs on all major operating systems, including Linux, UNIX (AIX, BSD, HP-UX, SGI IRIX, Mac OS X, Solaris, Tru64), and Windows. It is fully ACID compliant, has full support for foreign keys, joins, views, triggers, and stored procedures (in multiple languages). It includes most SQL:2008 data types, including INTEGER, NUMERIC, BOOLEAN, CHAR, VARCHAR, DATE, INTERVAL, and TIMESTAMP.
Using Netvizz & Gephi to Analyze a Facebook Network This post was originally featured on published on May 6th, 2010. Since the website will be relaunched and the post removed, I have relocated the tutorial to my personal page so that the Gephi community can continue to benefit from it. If a picture is worth a thousand words, then a graph must be worth a thousand spreadsheet rows, right? A Facebook network rendered in Gephi Okay, maybe not, but for practitioners and researchers alike, data visualization can reveal insights that aren’t always obvious from looking at the raw data, no matter how well organized it may be. When we’re talking about social network, data visualization takes the form of a “social graph,” and it can be a powerful tool to discover deeper meanings and applications behind the relationships and communities within a network.