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R Function of the Day: tapply

September 20, 2009
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Edit: This post originally appeared on my Wordpress blog on September 20, 2009. I present it here in its original form. The R Function of the Day series will focus on describing in plain language how certain R functions work, focusing on sim...

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Welcome to Sigmafield

September 20, 2009
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Edit: This post originally appeared on my Wordpress blog on September 20, 2009. I present it here in its original form. John Tukey's preface to Exploratory Data Analysis begins with a useful rule, "It is important to understand what you can...

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