Chapter 2 File Types and RMarkdown files

Syntax notes on using R via coding in RStudio.

• Use the Run button to submit a command line(s). Alternatively, use Ctrl + Enter hotkey on PC (or Cmd + Enter on Mac).
• R is case-sensitive – VERY IMPORTANT when typing in variable names.
• Anything on a line following a number sign, #, is a comment and will be ignored.
• Text strings must be entered with quotes around the word or phrase - correct to use " " but not correct to use “ ”.
• R ignores extra spaces within a line of command. Use with caution and for appropriate communication reasons!
• If you finish a command on one line, R assumes you are starting a new command on the next line. Future ways to wrap commands over multiple lines will be introduced.
• The back arrow <- is the assignment command. For introductory use, you may instead use the equal sign = (but this is generally less “universally” understood).
• You can go back and edit previous commands, using the mouse.

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