Using R and RStudio for Data Management, Statistical Analysis, and Graphics, 2nd Edition

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“K23166” — 2015/1/28 — 9:35 — page 187 — #213

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Chapter 12

Case studies

In this chapter, we explore several case studies that demonstrate the statistical computing

strengths and potential of R. This includes data management tasks, reading more complex

files, creating maps, data scraping, using the shiny system within RStudio, manipulating

larger datasets, and solving an optimization problem.

12.1 Data management and related tasks

12.1.1 Finding two closest values in a vector

Suppose we need to find the closest pair of observations for some variable. This might arise

if we were concerned that some data had been accidentally duplicated. In this case ...