which.max returns the position of the element with the maximal value in a vector.

n <- c (31, 47, 18, 9, 25, 19, 62, 32)

pos_max <- which.max(n)
print(pos_max)
# [1] 7

n[pos_max]
# [1] 62

 Summary function in R

summary() is a generic function used to produce result summaries of the results of various model fitting functions

Example

summary(school)
summary(as.factor(school$age))

names() function in R

names() function is used to give name to vector members.

Syntax

names(vector_variable) = c(“names”)

Example

names(employee role) = c(“EmpNo”,”EmpRole”)

Modulo Operator in R ( %% operator )

Example :

Result :

List in R

List is data structure in R with elements which can be of different types.

1. Creating List – with different types elements

diffTypeList <- list(1, “Introduction to R”, TRUE)

2. You can access single element double square brackets[[]]  

Example :
print(diffTypeList[[1]])            // Output [1] 1

3. You can modify by accessing element using double square brackets[[]]  

Example:
diffTypeList[[1]] <- 100

Vector is a data structure in R which is of fixed type and fixed length.

• Logical

• Integer

• Numeric

• Character

• Complex

Vectors of different types