Analyzing Big Data using the R Language

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This is a Cheat Sheet for the R Language. R is the language for big data analysis.

> 2+2
[1] 4

The result, is 4. It's printed on the console right after hitting enter.

Let's multiply 8 times 7 (* is the multiplication operator).

> 8*7 
[1] 56

Here are some logical expressions. Logical expression either return TRUE or FALSE

> 3==3
[1] TRUE
> 3 > 4
[1] FALSE

T is a shorthand for TRUE and F for FALSE

> F == FALSE
[1] TRUE

Variables are "containers" that hold a value. The value 42 is assigned to the variable "x".

> x <- 42

Print out the variable x

x
[1] 42

function

adding numbers

> sum(1,3,5)
[1] 9

Getting help

help (sum)
example (sqrt)

File Operation for the R Language

...

list.files()

source("Test1.R")
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