R(6), Operator
Types of the Operator in R
- arithmetic operators
- relational operators
- logical operators
- assignment operators
- Other operators
Arithmetic Operators(7)
+addition-subtraction*multiplication/division%%mod%/%quotient^exponentiation
examples
v <- c( 2,5.5,6)
t <- c(8, 3, 4)
print(v+t)
# 10.0 8.5 10.0
v <- c( 2,5.5,6)
t <- c(8, 3, 4)
print(v-t)
# -6.0 2.5 2.0
v <- c( 2,5.5,6)
t <- c(8, 3, 4)
print(v*t)
# 16.0 16.5 24.0
v <- c( 2,5.5,6)
t <- c(8, 3, 4)
print(v/t)
# 0.250000 1.833333 1.500000
v <- c( 2,5.5,6)
t <- c(8, 3, 4)
print(v%%t)
# [1] 2.0 2.5 2.0
v <- c( 2,5.5,6)
t <- c(8, 3, 4)
print(v%/%t)
# [1] 0 1 1
v <- c( 2,5.5,6)
t <- c(8, 3, 4)
print(v^t)
# [1] 256.000 166.375 1296.000
Relational Operators(6)
><==<=>=!=
Logical Operators(5)
All the number bigger than 1 will be considered as a logical value TRUE.
&, |, !: Each elements in the 1st vector will be compared to the corresponding elements in the 2rd vector.
&&, ||: Only consider the 1st elements in vectors. And the output is a vector that contain only one element.
Assignment Operators
leftward assignment:
<-=<<-
rightward assignment:
->->>
Other Operators
:creates a series of numbers for vectors in order.%in%identifies whether the element belongs to a vector.%*%multiply a matrix by its transposition.
v <- 2:8
print(v)
# 2 3 4 5 6 7 8
v1 <- 8
v2 <- 12
t <- 1:10
print(v1 %in% t)
print(v2 %in% t)
# TRUE
# FALSE
M = matrix( c(2,6,5,1,10,4), nrow = 2,ncol = 3,byrow = TRUE)
t = M %*% t(M)
print(t)
# [,1] [,2]
# [1,] 65 82
# [2,] 82 117