R语言算术运算和逻辑运算
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 |
文章来自：http://www.cnblogs.com/emanlee/p/3840323.html