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: " In the following figure, the R version 3.4.1 interface is shown."
Any command-line input or output is written as follows:
$ mkdir css$ cd css
Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "The purposes of regression as a statistical tool are of two types synthesize and generalize, as shown in the following figure."
Warnings or important notes appear like ...
