Table of Contents

• Introduction and preliminaries
• Simple manipulations; numbers and vectors

Introduction and preliminaries

• R is case sensitive
• Symbols: [A-Za-z][.0-9A-Za-z_]* or [.]([A-Za-z][.0-9A-Za-z_]*)?
• character can be expressed by 'foo or "foo" . Usually "foo" is preferred.
• Commands are separated either by a semi-colon(;) or by a newline(\n).
• Commands can be grouped by braces({})
• Comments can be put almost everywhere, staring with #

Simple manipulations; numbers and vectors

# following lines are all the same
x <- 0
0 -> x
x = 0
assign("x", 0)