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

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“K23166” — 2015/1/28 — 9:35 — page 197 — #223

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12.4. DATA SCRAPING 197

the line before this processing. These date/time values are read into the timeval vector.

Even-numbered lines are read into the rank vector, after removing the strings salesrank=

and NA (again using two calls to gsub()). Finally, we make a dataframe (A.4.6) from the

two vectors and display the first few lines using the head() function (1.2.1).

> library(RCurl)

> myurl =

getURL("https://www3.amherst.edu/~nhorton/r2/datasets/cartoon.txt",

ssl.verifypeer=FALSE)

> file = readLines(textConnection(myurl))

> n = length(file)/2

> rank = numeric(n)

> timeval = as.POSIXlt(rank, origin="1960-01-01") ...