R Programming: Count number of objects in a given list

R Programming: List Exercise-11 with Solution

Write a R program to count number of objects in a given list.

Sample Solution :

R Programming Code :

list_data <- list(c("Red","Green","Black"), matrix(c(1,3,5,7,9,11), nrow = 2),
list("Python", "PHP", "Java"))
print("List:")
print(list_data)
print("Number of objects in the said list:")
length(list_data)

Sample Output:

[1] "List:"
[[1]]
[1] "Red"   "Green" "Black"

[[2]]
     [,1] [,2] [,3]
[1,]    1    5    9
[2,]    3    7   11

[[3]]
[[3]][[1]]
[1] "Python"

[[3]][[2]]
[1] "PHP"

[[3]][[3]]
[1] "Java"


[1] "Number of objects in the said list:"
[1] 3                         

R Programming Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a R program to create a list of dataframes and access each of those data frames from the list.
Next: Write a R program to convert a given dataframe to a list by rows.