R Language

INTRODUCTION:

R is an open source programming language and software environment for statistical computing

and graphics. The R language is widely used among statisticians and data miners for developing

statistical software and data analysis. But, we are going to integrate R with Hadoop in order to

manage BigData efficiently.

BASIC COMMANDS:

GetDirectory:

getwd() [ R language is case sensitive ]

Assignment:

Single value:

s < - 3 or s = 3 [The value of s is 3]

Multiple values:

s < - c (1, 2, 3) [The value of s is 1, 2, 3]

Or

s < - c (1:3) [The value of s is 1, 2, 3]

Mean:

mean(x) [The mean of x i.e. 1, 2, 3 is 2]

Variance:

var(x) [The variance of x i.e.1, 2, 3 is 1]

Linear Model:

lm_1 < - lm(y~x) [The linear model between two variables will be shown]

Graphical Representation:

plot (lm_1) [The linear model will be graphically represented]

Summary:

summary (lm_1) [The summary of the linear model will be shown]

List of variables:

ls () [ The list of all variables used will be shown]

Reading files:

read.table ( file=”sample.csv”)

[Files can be read in this way, mostly csv files]

CONCLUSION:

Some basic commands are being noted down. These may help to gain some primary knowledge

on R. R with Hadoop is still in progress.