Data Analysis with R, Second Edition - Second Edition

Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "Mount the downloaded WebStorm-10*.dmg disk image file as another disk in your system."

A block of code is set as follows:

# don't worry about memorizing this temp.density <- density(airquality$Temp) 
pdf <- approxfun(temp.density$x, temp.density$y, rule=2) 
integrate(pdf, 80, 90)

When we wish to draw your attention to a particular part of a code block or output, the relevant lines or items are set in bold:

table(mtcars$carb) / length(mtcars$carb) 
   
 1 2 3 4 6 8 0.21875 0.31250 0.09375 ...