CODEWITHSUNDEEP
rlistsubsetapply
BMT
BMT

Reputation: 65

selecting elements bigger than a particular number in a list

I have a list with a big structure similar to this:

BigList = 
[[1]]
[1] matrix
[2] array
[3] data.frame
[4] data.frame
[5] integer
[6] character
  ...
[26]

[[2]]
[1] 
  ...
[26]

[[3]]
[1] 
  ...
[26]

[[4]]
...

I am trying to get data greater than 10 from element 5 (named "n" in my list) of each list using:

Listsubset = laply(BigList, function(x) x$n[n>10]) Not working

and also use this:

Listsubset = laply(filo_main_data, function(x) x$n >10) Which worked but gave it to me a result of logical information (TRUE or FALSE) and I would like to get which values of n are TRUE.

Upvotes: 0

Views: 811

Answers (2)

akrun
akrun

Reputation: 887391

We can use lapply

 BigList[unlist(lapply(BigList, `[[`, "n")) > 10]

Upvotes: 0

Ronak Shah
Ronak Shah

Reputation: 389065

You can use Filter :

Listsubset <- Filter(function(x) x$n > 10, BigList)

Or an alternative with sapply :

Listsubset <- BigList[sapply(BigList, `[[`, 'n') > 10]

Upvotes: 1

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