• 4 panes
• console
• script tabs (cmd+enter / ctrl+enter)
• projects (.Rproj)
• autocomplete (tab)

• data/
• R/ (functions)
• tests/ (function calls)
• inst/app (shiny)

• What does '<-' mean?
• What's the difference between (),[] and {}?
• make sure you got these basic questions (slides 8 ff) right!

Formats:

• binary (.RData)
• text formats (.csv, json)
• spreadsheets (.xlsx)
• other foreign formats (.dta, spss, …)

Sources:

• built-in
• local file system
• APIs (quandl, twitter, …)

• base R functions (mean, sum, …)
• core extension functions (lm, t.test, stl)
• functions from other (CRAN) packages (runApp, renderTable)
• custom functions (anonymous and non-anymous)

! Note some functions come in disguise, e.g., +(), ``

• define a function using the function(){}
• call with functionName(param1,param2)
• apply functions to a list (lapply)

! A word about scoping (searching for objects): R looks for variables on the inside of a function first, then starts to check the outside.

=> DO NOT create functions that rely on outside objects!

• base R (plot, hist, …)
• advanced static plots (ggplot, lattice, …)
• interactive plots (dygraphs, rCharts, …)