5.2) Options For Linear Models
Of course, formulae can be a lot more complex than that. Type ?formula
for more information, or go to the Html help file (Help menu > Html help > An Introduction to R), which has a good section on formulae for linear models.
Other arguments for lm()
can include data=
, to specify a data frame whose column names you have used in the formula (rather than first attaching the data frame or else prefixing the names with the data frame name plus $
), and subset=
, if you want to specify a subset of that data frame.
For help and examples, work through the exercises below. This could also be the time to start analysing some of your own data.