DC Introduction to R - Intro to basics

#	DC Introduction to R
	DC Introduction to R - Intro to basics
	DC Introduction to R - Vectors
	DC Introduction to R - Matrices
	DC Introduction to R - Factors
	DC Introduction to R - Data frames
	DC Introduction to R - Lists

1 How it works

• https://campus.datacamp.com/courses/free-introduction-to-r/chapter-1-intro-to-basics-1?ex=1

# Calculate 3 + 4
3 + 4
#[1] 7

# Calculate 6 + 12
6 + 12
#[1] 18

2 Arithmetic with R

• https://campus.datacamp.com/courses/free-introduction-to-r/chapter-1-intro-to-basics-1?ex=2

# An addition
5 + 5 
#[1] 10

# A subtraction
5 - 5 
#[1] 0

# A multiplication
3 * 5
#[1] 15

 # A division
(5 + 5) / 2 
#[1] 5

# Exponentiation
2^5
#[1] 32

# Modulo
28 %% 6
#[1] 4

3 Variable assignment

• https://campus.datacamp.com/courses/free-introduction-to-r/chapter-1-intro-to-basics-1?ex=3

# Assign the value 42 to x
x <- 42

# Print out the value of the variable x
x
#[1] 42

4 Variable assignment (2)

• https://campus.datacamp.com/courses/free-introduction-to-r/chapter-1-intro-to-basics-1?ex=4

# Assign the value 5 to the variable my_apples
my_apples <- 5

# Print out the value of the variable my_apples
my_apples
#[1] 5

5 Variable assignment (3)

• https://campus.datacamp.com/courses/free-introduction-to-r/chapter-1-intro-to-basics-1?ex=5

# Assign a value to the variables my_apples and my_oranges
my_apples <- 5


# Add these two variables together
my_oranges <- 6

# Create the variable my_fruit
my_apples + my_oranges 
#[1] 11

my_fruit <- my_apples + my_oranges

6 Apples and oranges

• https://campus.datacamp.com/courses/free-introduction-to-r/chapter-1-intro-to-basics-1?ex=6

# Assign a value to the variable my_apples
my_apples <- 5 

# Fix the assignment of my_oranges
#my_oranges <- "six" 
my_oranges <- 6 

# Create the variable my_fruit and print it out
my_fruit <- my_apples + my_oranges 
my_fruit
#[1] 11

7 Basic data types in R

• https://campus.datacamp.com/courses/free-introduction-to-r/chapter-1-intro-to-basics-1?ex=7

# Change my_numeric to be 42
#my_numeric <- 42.5
my_numeric <- 42

# Change my_character to be "universe"
#my_character <- "some text"
my_character <- "universe"

# Change my_logical to be FALSE
#my_logical <- TRUE
my_logical <- FALSE

8 What's that data type?

• https://campus.datacamp.com/courses/free-introduction-to-r/chapter-1-intro-to-basics-1?ex=8

# Declare variables of different types
my_numeric <- 42
my_character <- "universe"
my_logical <- FALSE 

# Check class of my_numeric
class(my_numeric)
#[1] "numeric"

# Check class of my_character
class(my_character)
#[1] "character"

# Check class of my_logical
class(my_logical)
#[1] "logical"