Statistics and Statistical Programming (Winter 2017)/R lecture outline: Week 2

material not covered last week we'll want to cover this time:

• adding comments: lines that start with # (or anything after a #)
• more advanced variables types:
  • factors: for categorical data
    • make with factor("mako", "mika", "mako")
    • you can create factors from characters with as.factor()
  • also think about: dates with POSIXct(), ordered() — really just a type of factor for ordinal data