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- September 3. 2008: New Blog Software ... and conversion of prior 127 entries
- June 15. 2007: Data Visualization Tools
- May 15. 2007: Microsoft Vists, Longhorn, and evolution of operating systems
- May 4. 2007: APress - computer book publisher with the right approach
- May 1. 2007: Presentations ... and PowerPoint of course
- April 17. 2007: A security course in 12 slides!
- April 4. 2007: Transferring the Registrar of a Domain Name (Yahoo Hosting)
- March 31. 2007: How Students Develop Online Learning Skills
- March 9. 2005: Tape Mishap Prompts Calls for Disk Backups - Computerworld
- March 1. 2005: Jon Udell: All about screencasting
Archive for the DataAnalysis Category
Data Visualization Tools
June 15. 2007 by Del.
Steve Gibson of grc.com and Security Now guided me to SpaceMonger - a disk / file visualization tool. Think in terms of size, age, and other file attributes - then map multiple variables of a hierarchy in a map with size and color to differentiate. The results are stunning visuals that let you immediately hone in on relevant criteria. Over the last few years similar maps of the stock market with industry and company information have become popular.
But now the best part! All of this technology is based on research conducted at the University of Maryland. Documentation and flash video tutorials are online and available!
Treemap is a space-constrained visualization of hierarchical structures. It is very effective in showing attributes of leaf nodes using size and color coding. Treemap enables users to compare nodes and sub-trees even at varying depth in the tree, and help them spot patterns and exceptions.
The research team has also developed tools (free for academic use) to create treemap. The current version is 4.1.1 and is available at http://www.cs.umd.edu/hcil/treemap/ .
Posted in Visualization, DataAnalysis, statistics | Print | No Comments »
APress - computer book publisher with the right approach
May 4. 2007 by Del.
Ok - computer application books are a dime a dozen and even though they look good in the bookstore - by the time you crack the cover, the reality is the first few chapters cover the basics, the middle of the book covers some good info … but not in enough detail to get you past the first roadblock (back to Google for answers!), and the final “advanced topics” chapters aren’t (advanced … of course they are “final”).
Apress caught my eye in the bookstore today with a couple of uniquely titled Excel books (pivot tables and database functions). The books cut right to the chase and into the meat of the topic. No generic how to find the power button Chapter 1! Their website has the tagline “books for professionals by professionals”. The website also contains sample chapters, table of contents, and source code files. Great way to check out the details.
Books that caught my eye:
A Complete Guide to PivotTables: A Visual Approach
Excel 2007: Beyond the Manual
and Beginning Python: From Novice to Professional which has potential application for writing data analysis detectlets in Picalo.
Posted in book, Python, DataAnalysis, spreadsheet | Print | No Comments »