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Introdução ao R
Transcript of Introdução ao R
R is free!
Interactive data analysis and exploration
R runs on Windows, Unix, and Mac OS X
And much more...
Example of Graphics Capabilies
Obtaining and installing R
R is freely available
command prompt (>)
vectors, matrices, factors, lists and data frames
Functionality is provided through built-in and user-created functions
Basic functions are available by default
Packages can be attached to a current session.
Statements consist of functions and assignments. R
x <- rnorm(5)
Comments are preceded by the # symbol
To get a sense of what R can do graphically, enter demo(graphics)at the command prompt.
Other demonstrations include demo(Hershey), demo(persp), and demo(image). To see a complete list of demonstrations, enter demo().
R working environment
objects (vectors, matrices, functions, data frames, or lists)
Commands are entered interactively at the R user prompt
To scroll use up and down arrow keys
Current working directory -
Set the current working directory -
Introdução ao R
UFF-PPGAD - 2015
Working in R
Lessons from R
Data analys is very diferent from system programming
People will put up with a lot to get their work done
People will use a familiar tool over a better tool if all feasible
Fist class functions, closures
Objects (2 ways)
Pass by value
Everything is nullable (2 ways)
R became the pattern so forth
KOBAKOF, R. I., R in Action, Manning Shelter Island, 2011
EVERITT, B.; HOTHORN,T; An Introduction to Applied Multivariate Analysis with R
The R Language The Good The Bad And The Ugly - John Cook - youtube