INTRODUCTION TO R

VISAKH.V.NAIRS7 CSE

INTRODUCTION

Bell Laboratories (formerly AT&T, now Lucent Technologies) by John Chambers and colleagues

R is the leading tool for statistics, data analysis, and machine learning.

It is more than a statistical package;

its a programming language, so you can create your own objects, functions, and packages.

Platform-independent

Open-source

Allows you to integrate with other languages (C/C++, Java, Python)

widely used among data miners for developing data surveys of data miners

INTRODUCTION(Cont..)

InstallationR can be downloaded from one of the mirror sites in http://cran.r-project.org/mirrors.html. You should pick your nearest location.

R SessionAfter R is started, there is a console awaiting for input. At the prompt (>), you can enter numbers and perform calculations.

FUNCTIONS

COMMENTS

Extension Package

HELP

DATA TYPES

Numeric

Integer

Complex

Logical

Character

IntegerIn order to create an integer variable in R, we invoke the as.integer function. We can be assured that y is indeed an integer by applying the is.integer function.

COMPLEX

Standard logical operations are "&" (and), "|" (or), and "!" (negation).

LOGICAL

CHARACTER

MATRIX

MATRIX(Cont..)

Elementary Statistics with R

Qualitative Data

Quantitative Data

Numerical Measures

Probability Distributions

R built-in data frame named painters.

Qualitative Data

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