- > is the prompt sign in R

- The assignment operators are the left arrow with dash <- and equal sign =.

> x <- 20 assigns the value 20 to x.

> x = 20 assigns the value 20 to x.

Initially only <- was available in R.

- > x = 20 assigns the value 20 to x.

> y = x + 2 assigns the value 2 * x to y.

> z = x + y assigns the value x + y to z.

# : The character # marks the beginning of a comment. All characters until the end of the line are ignored.

> # mu is the mean

> # x <- 20 is treated as comment only.

Capital and small letters are different.

> x <- 20 and > x <- 20 are different

The command c (1,2,3,4,5) combines the numbers 1,2,3,4 and 5 to a vector.

> 2 + 3 # Command

[1] 5 # Output

> 2 * 3 # Command

[1] 6 # Output

> c ( 2,3,5,7) * 3

[1] 6 9 15 21

> (2,3,5,7) + 10

[1] 12 13 15 17

- The assignment operators are the left arrow with dash <- and equal sign =.

> x <- 20 assigns the value 20 to x.

> x = 20 assigns the value 20 to x.

Initially only <- was available in R.

- > x = 20 assigns the value 20 to x.

> y = x + 2 assigns the value 2 * x to y.

> z = x + y assigns the value x + y to z.

# : The character # marks the beginning of a comment. All characters until the end of the line are ignored.

> # mu is the mean

> # x <- 20 is treated as comment only.

Capital and small letters are different.

> x <- 20 and > x <- 20 are different

The command c (1,2,3,4,5) combines the numbers 1,2,3,4 and 5 to a vector.

**R as a calculator**> 2 + 3 # Command

[1] 5 # Output

> 2 * 3 # Command

[1] 6 # Output

**Multiplication and Division x * y , x/y**> c ( 2,3,5,7) * 3

[1] 6 9 15 21

**Addition and Subtraction x + y , x - y**> (2,3,5,7) + 10

[1] 12 13 15 17

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