Question

How to access elements of a vector using index in R

Answer 1

vec <- c(4, 6, 8, 1, 5)

print(vec[1])
print(vec[2]) 
print(vec[3]) 
 

 
# run:
#
# [1] 4
# [1] 6
# [1] 8
#
 

 

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Answer 2

vec <- c(4, 6, 8, 1, 9, 7)

print(vec[c(2, 4, 5)])

 

 
# run:
#
# [1] 6 1 9
#
 

 

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Answer 3

vec <- c(4, 6, 8, 1, 9, 7)

print(vec[-1])

 

 
# run:
#
# [1] 6 8 1 9 7
#

 

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