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How to check if a list element is greater than a certain value in R?
If we have a list that contains numeric elements and we want to check whether the elements are greater than a certain value then as.numeric function can be used. The output of the function will be in 0/1 format where 0 represents FALSE and 1 represents TRUE. For example, if we have a list called LIST then to check whether elements in LIST are greater than 2 can be done as as.numeric(LIST>2).
Example1
List1<−list(1,2,2,2,4,1,2,5,5,2,3,5,2,2,2,2,5,5,8,9,6,5,5) List1
Output
[[1]] [1] 1 [[2]] [1] 2 [[3]] [1] 2 [[4]] [1] 2 [[5]] [1] 4 [[6]] [1] 1 [[7]] [1] 2 [[8]] [1] 5 [[9]] [1] 5 [[10]] [1] 2 [[11]] [1] 3 [[12]] [1] 5 [[13]] [1] 2 [[14]] [1] 2 [[15]] [1] 2 [[16]] [1] 2 [[17]] [1] 5 [[18]] [1] 5 [[19]] [1] 8 [[20]] [1] 9 [[21]] [1] 6 [[22]] [1] 5 [[23]] [1] 5
Checking whether elements in List1 are greater than 5 or not −
Example
as.numeric(List1>5)
Output
[1] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0
Example2
List2<−list(4,7,5,4,1,2,5,2,3,6,5,7,7,1,1,2,5,5,9,2) List2
Example
[[1]] [1] 4 [[2]] [1] 7 [[3]] [1] 5 [[4]] [1] 4 [[5]] [1] 1 [[6]] [1] 2 [[7]] [1] 5 [[8]] [1] 2 [[9]] [1] 3 [[10]] [1] 6 [[11]] [1] 5 [[12]] [1] 7 [[13]] [1] 7 [[14]] [1] 1 [[15]] [1] 1 [[16]] [1] 2 [[17]] [1] 5 [[18]] [1] 5 [[19]] [1] 9 [[20]] [1] 2
Checking whether elements in List2 are greater than 2 or not −
Example
as.numeric(List2>2)
Output
[1] 1 1 1 1 0 0 1 0 1 1 1 1 1 0 0 0 1 1 1 0
Updated on: 09-Feb-2021
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