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Section 10.8 R Functions Used in This Chapter
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abline() plots a best fitting line on top of a scatterplot
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attach() makes a data structure the "focus" of attention
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getwd() show the current working directory for R
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ifelse() a conditional test that provides one of two possible outputs
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lm() "linear models" and for this chapter, multiple regression
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plot() general purpose graphing function, many uses in R summary produces an overview of an output structure
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