For example, I often work with voter files that include voter history. I often want to group by the election on one axis and the ballots cast by party, age, geography, or some other available variable. My old habits have me drop this data into Excel and make a pivot table to summarize these variables. Something that I kept wanting to do with R is replicate this tool.

Our body is constantly exposed to all sorts of microorganisms, in which some can prove indispensable to maintaining a healthy body while others can lead to plenty of problems. A healthy intestinal tract is at the core of a healthy system.

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Nutrition in the Holistic Paradigm. So what causes pregnancy brain? Like not getting adequate vitamins and minerals.