How to Subset List Elements Conditionally in R (Example Code)

This page explains how to extract certain list elements based on a logical condition in the R programming language.

Creation of Example Data

example_list <- list(l1 = 10:3,                    # Constructing example list
                     l2 = letters[15:20],
                     l3 = 9:7)
example_list                                       # Displaying example list in RStudio console
# $l1
# [1] 10  9  8  7  6  5  4  3
# 
# $l2
# [1] "o" "p" "q" "r" "s" "t"
# 
# $l3
# [1] 9 8 7

Example: Apply Filter() Function to Select List Elements Conditionally

Filter(function(x) length(x) > 5, example_list)    # Using Filter() function
# $l1
# [1] 10  9  8  7  6  5  4  3
# 
# $l2
# [1] "o" "p" "q" "r" "s" "t"

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