Posts Tagged ‘ with ’

Example 8.41: Scatterplot with marginal histograms

June 20, 2011
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Example 8.41: Scatterplot with marginal histograms

The scatterplot is one of the most ubiquitous, and useful graphics. It's also very basic. One of its shortcomings is that it can hide important aspects of the marginal distributions of the two variables. To address this weakness, you can add a histo...

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To attach() or not attach(): that is the question

May 3, 2011
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To attach() or not attach(): that is the question

R objects that reside in other R objects can require a lot of typing to access. For example, to refer to a variable x in a dataframe df, one could type df$x. This is no problem when the dataframe and variable names are short, but can become burdensom...

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Friday function triple bill: with vs. within vs. transform

April 29, 2011
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Friday function triple bill: with vs. within vs. transform

When you first learnt about data frames in R, I’m sure that, like me, you thought “This is a lot of hassle having to type the names of data frames over and over in order to access each column”. library(MASS) anorexia$wtDiff <- anorexia$Postwt - anorexia$Prewt #I have to type anorexia how many times? Indeed, any

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