When you first open R, you’re greeted with a screen similar to the following: ?View Code RSPLUS1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 R version 2.10.0 (2009-10-26) Copyright (C) 2009 The R Foundation for Statistical Computing ISBN 3-900051-07-0 R is free software [...]
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Pivot Tables in Excel and OpenOffice.org Calc
One of the features I find useful in Excel is the ability to create “pivot” tables. Essentially pivot tables let you summarize big tables of data in different ways, using different variables to “pivot” your data around (hence the name, I guess). Pivot tables are most easily understood through an example, so here’s one done [...]