Identifying Records in Data Frame A That Are Not Contained In Data Frame B – A Comparison

October 12, 2011 | 0 Comments

Yesterday I launched my first question at Stackoverflow and apparently did a lot of things wrong as I managed to get my question closed wihtin hours I had collected 9 different solutions to the problem and made the mistake to put it all within the original ... [Read more...]

Example 8.33: Merging data sets one-to-many

April 5, 2011 | 0 Comments

It's often necessary to combine data from two data sets for further analysis. Such merging can be one-to-one, many-to-one, and many-to-many. The most common form is the one-to-one match, which we cover in section 1.5.7. Today we look at a one-to-man...
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Example 8.31: Choropleth maps

March 22, 2011 | 0 Comments

In our book, we show a simple example of a map (section 6.4.2) where we read the boundary files as data sets and use SAS and R to plot them. But both SAS and R have complex functionality for using pre-compiled map data. To demonstrate them, we'll sho...
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