How to Combine Lists in R

In this article, we will discuss to see how to combine the Lists in R programming language.

Method 1: Using c() function

We can combine lists by appending the lists using c() function.

Syntax:

c(list1,list2,list3,..,list n)

Where lists is the multiple lists

Example: R program to combine 4 lists

R

# create list1
list1=list(names=c('sravan','bobby','ojaswi'),
           marks=c(100,89,76))

# create list2
list2=list(names=c('rohith','gnanesh','satwik'),
           marks=c(96,89,70))

# create list3
list3=list(names=c('vijay','gopal','harsha'),
           marks=c(100,89,76))

# create list4
list4=list(names=c('ramya','khyathi','ramya preethi'),
           marks=c(96,89,70))


# combine lists using c() function
final_list=c(list1,list2,list3,list4)

# display list
print(final_list)

Output:

Method 2 : Using append() function

By using append() function we can combine lists

Syntax:

append(list1,list2,list3,.,listn)

Example: R program to combine lists using append() function

R

# create list1
list1=list(names=c('sravan','bobby','ojaswi'),
           marks=c(100,89,76))

# create list2
list2=list(names=c('rohith','gnanesh','satwik'),
           marks=c(96,89,70))

# combine lists using append() function
final_list=append(list1,list2)

# display list
print(final_list)

Output:

Method 3 : Using mapply() function

This function is used to combine multiple lists

Syntax:

mapply(c,list1,list2,..,listn)

Where, 

• list is the input lists
• c is the function that combines the lists

Example: R program to combine 4 lists using mapply() method

R

# create list1
list1=list(names=c('sravan','bobby','ojaswi'),
           marks=c(100,89,76))

# create list2
list2=list(names=c('rohith','gnanesh','satwik'),
           marks=c(96,89,70))

#create list3
list3=list(names=c('vijay','gopal','harsha'),
           marks=c(100,89,76))

# create list4
list4=list(names=c('ramya','khyathi','ramya preethi'),
           marks=c(96,89,70))

# combine lists using mapply() function
final_list=mapply(c,list2,list3,list4)

# display list
print(final_list)

Output:

Method 4 : Using map() function

map() function works similar to mapply() to combine multiple lists into one.

Syntax:

Map(c,list1,list2,..,listn)

where,

• list is the input lists
• c is the function that combines the lists

Example:  R program to combine multiple lists using Map() function

R

# create list1
list1=list(names=c('sravan','bobby','ojaswi'),
           marks=c(100,89,76))

# create list2
list2=list(names=c('rohith','gnanesh','satwik'),
           marks=c(96,89,70))

# create list3
list3=list(names=c('vijay','gopal','harsha'),
           marks=c(100,89,76))

# create list4
list4=list(names=c('ramya','khyathi','ramya preethi'),
           marks=c(96,89,70))

# combine lists using Map() function
final_list=Map(c,list2,list3,list4)

# display list
print(final_list)

Output: