R programming.

Aim:

To learn about R

Data types in R:

R has variety of data types such as vector, matrices, numerical, logical, character, data frames etc..

a few examples are

vector:

a <- c(1,2,5.3,6,-2,4) # numeric vector b <- c("one","two","three") # character vector

matrices:

all columns in a matrix must have same mode ( same charactes, same numerics) etc..

general format :

mymatrix <- matrix(vector, nrow= r, ncol= c, byrow= FALSE,
dimnames=list( char_vector_rownames, char_vector_colnames))

unlike other prog languages, in r we could just print the variable or value holder by just naming it without adding a print statement to print it.

> x <- 5 ## nothing printed

> x ## auto-printing occurs

[1] 5

> print(x) ## explicit printing

[1] 5

vijay purushoth