R Programming For Beginners | R Language Tutorial | R Tutorial For Beginners | Edureka

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https://www.edureka.co/r-for-analyticsEDUREKA DATA ANALYTICS WITH R CERTIFICATION TRAINING
What is Hadoop?

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➢ Variables
➢ Data types
➢ Operators
➢ Conditional Statements
➢ Loops
➢ Strings
➢ Functions
Agenda

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R Installation

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RStudio Installation

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Variables
Data types
Operators
Conditional
Statements
Loops Functions
Strings

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Variable
Variables are nothing but reserved memory locations to store values. This means that
when you create a variable you reserve some space in memory.
X = 15
Y <- “Hello”
TRUE -> B
B = TRUE
Y = Hello
X = 15
Memory

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Operators
Conditional
Statements
Loops FunctionsVariables
Data types
Strings

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Data types
A data type, in programming, is a classification that specifies which type of value a variable
has and what type of mathematical, relational or logical operations can be applied to it
without causing an error.
X = 15
Y <- “Hello”
TRUE -> B
B = TRUE
Y = 3.142857
X = 15
Memory
Integer
Numeric
Boolean

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Data types
Data types

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Vector
 A Vector is a sequence of data elements of the same basic type
 There are 5 Atomic vectors, also termed as five classes of vectors.
True or False
15L, 30L, 1699L
5, 3.14285, 945678
4+3i, 8+7i
‘A’, “Hey”, ’True’
Integer
Numeric
Complex
Character
Logical

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Matrix
 Matrix are the R objects in which the elements are arranged in a
two-dimensional rectangular layout.
matrix(data, nrow, ncol, byrow, dimnames)
❖ data is the input vector which becomes the data elements of the matrix.
❖ nrow is the number of rows to be created.
❖ ncol is the number of columns to be created.
❖ byrow is a logical clue. If TRUE then the input vector elements are arranged by row.
❖ dimname is the names assigned to the rows and columns.
Syntax

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Array
 Arrays are the R data objects which can store data in more than
two dimensions.
array( data, dim, dimnames)
array( c(0:15), dim=c( 4,4,2,2) )
Syntax

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Lists
 Lists are the R objects which contain elements of different types
like − numbers, strings, vectors and another list inside it.
list(data)Syntax
vtr1 <- c(1:5)
vtr2 <- c("hi", "Hello", "How are you")
vtr3 <-c(TRUE,TRUE, FALSE, FALSE)
myList <- list(vtr1,vtr2, vtr3)

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Data Frame
 Data Frame is a table or a two-dimensional array-like structure in
which each column contains values of one variable and each row
contains one set of values from each column.
data.frame(data)Syntax
data.frame(mtcars)

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Conditional
Statements
Loops Functions
Strings
Variables
Data types
Operators

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Data Operators in R
Operators
Relational
Operators
Arithmetic
Operators
Logical
Operators
Assignment
Operations Operators are the constructs which can manipulate the value of operands.

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Arithmetic and Relational Operators
Arithmetic
a + b
a – b
a * b
a / b
a %% b
a^b
a%/%b
Subtraction
Division
Multiplication
Modulus
Exponent
a == b
a != b
a > b
a < b
a >= b
a <= b
Equal To
Greater Than
Not Equal To
Less Than
Greater Than Equal To
Less Than Equal To
Relational
Addition
Floor Division

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Assignment Operator
There are two types of Assignment operators: Left and Right
Left
Right
Equals
Assign
Equals
Assign
x=5
x<- 15
20=x
25 -> x

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Logical Operator
There are three types of logical operators: AND, NOT, OR
a & b
It combines each element of vectors and gives a output
TRUE if both the elements are TRUE.
a | b It combines each element of the vectors and gives a
output TRUE if one the elements is TRUE.
!a Takes each element of the vector and gives the opposite
logical value.

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Operators
Conditional
Statements
Loops Functions
Strings
Variables
Data types

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Conditional Statements
If Statement
If code
End
Start
If
Condition
FALSETRUE
Syntax:

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Else If Statement
If code
End
Start
If
Condition
FALSE
TRUE
FALSE
Else If
Condition
TRUE
Else If code
Syntax:

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Else Statement
Syntax:
If code
End
Start
If
Condition
FALSE
TRUE
FALSE
Else If
Condition
TRUE
Else If code
Else code

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Switch case Statement
Syntax:
Start
switch
Condition
Case value1 Statement 1
default Statement
End

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Conditional
Statements
Operators Functions
Strings
Variables
Data types
Loops

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Loops in R
A loop statement allows us to execute a statement or group of statements
multiple times.
Loops
Loops
forwhilerepeat

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Repeat Loop
repeat Repeats a statement or group of statements while a given condition is TRUE. It
tests the condition after executing the loop body.
Syntax:
CHECK
CONDITION
EXECUTE BLOCK
START
EXIT LOOPFALSE
TRUE
repeat

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While Loop
while Loop Repeats a statement or group of statements while a given condition is TRUE. It
tests the condition before executing the loop body.
Syntax:
CHECK
CONDITION
EXECUTE BLOCK
START
repeat
EXIT LOOP
FALSE
TRUE

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For Loop
for Loop Repeats a statement or group of for a fixed number of times. It tests the
condition before executing the loop body.
Syntax:
Check
condition
Initialization
START
Iteration
Execute Statements
Exit loop
FALSE
TRUE
repeat

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Loops
Strings
Conditional
Statements
Operators FunctionsVariables
Data types

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 Any value written within a pair of single quote or double quotes in R is treated as a string.
String in R
Syntax:

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String in R
Sequence Operations:
➢ Concatenation:
str1<- ‘Hi’
str2<- “How are you?”
paste(str1,str2) "Hi How are you? "
➢ Character Count:
nchar(str)str<-“Edureka” 7
➢ Case Change
toupper(str)
tolower(str)
str<-“Edureka”
EDUREKA
edureka
➢ Substring
substring(str, 3, 6)str<-“Edureka” “urek”

Functions
Loops
Conditional
Statements
OperatorsVariables
Data types Strings

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Functions
A function is a block of organized, reusable code that is used to perform a
single, related action.
Functions
Predefined
Functions
User Defined
Functions
Function Add
Call (3,5)
Call (6,9)
Call (1,5)
Call 1
Call 2
Call 3
Return 8
Return 15
Return 6
Functions In R

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Session In A Minute
Install R & RStudio Data Types
Conditional Statements Loops
Data Operators
Functions

R Programming For Beginners | R Language Tutorial | R Tutorial For Beginners | Edureka

R Programming For Beginners | R Language Tutorial | R Tutorial For Beginners | Edureka

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