Quick R|Operators

转载于 2019-05-15 21:03:32 发布 · 210 阅读

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本文详细介绍了R语言中的算术和逻辑运算符，包括加、减、乘、除、指数运算、取模、整数除法等算术运算符，以及小于、小于等于、大于、大于等于、等于、不等于、非、或、与等逻辑运算符，并通过实例展示了如何使用这些运算符进行条件筛选。

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https://www.statmethods.net/management/operators.html

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)] # yields 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

%in%：http://r.789695.n4.nabble.com/in-operator-NOT-IN-td3506655.html