1. Getting HELP

In R.app,

  1. If you type the first letters of a function name, hitting tab will helpfully list all the functions that begin that way.
  2. Once you have a function name and open the left (, R.app's status bar will show you all the labelled parameters.
  3. Very helpfully, typing tab inside the function brackets will drop down a list of parameters for you to choose.
  4. To open the manual pages for a function, add a ? before the function name, and press return. In R.app, you can type cntrl-H while your cursor is inside the function you want help on.

The package sos will search more generally for functions:

findFn("part correlation")