- > 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.
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
- 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
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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