Operators
R's binary and logical operators will look very familiar to programmers. Note that binary operators work on vectors and matrices as well as scalars.
Arithmetic Operators
| Operator | Description |
| + | addition |
| - | subtraction |
| * | multiplication |
| / | division |
| ^ or ** | exponentiation |
| x %% y | modulus (x mod y) 5%%2 is 1 |
| x %/% y | integer division 5%/%2 is 2 |
Logical Operators
| Operator | Description |
| < | less than |
| <= | less than or equal to |
| > | greater than |
| >= | greater than or equal to |
| == | exactly equal to |
| != | not equal to |
| !x | Not x |
| x | y | x OR y |
| x & y | x AND y |
| isTRUE(x) | test if X is TRUE |
# An example
x <- c(1:10)
x[(x>8) | (x<5)]
# yeilds 1 2 3 4 9 10
# How it works
x <- c(1:10)
x
1 2 3 4 5 6 7 8 9 10
x > 8
F F F F F F F F T T
x < 5
T T T T F F F F F F
x > 8 | x < 5
T T T T F F F F T T
x[c(T,T,T,T,F,F,F,F,T,T)]
1 2 3 4 9 10