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Logically index list of lists in R
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| # Length of sublist | |
| dat$media_url[sapply(dat$media_url, function(x) length(x) == 2)] | |
| # not empty sublists | |
| dat$media_url[sapply(dat$media_url, function(x) !is.na(x))] | |
| dat$media_url[sapply(dat$media_url, function(x) all(!is.na(x)))] # multiple NA values per sublist | |
| na.omit.list <- function(list) { | |
| return(list[sapply(list, function(x) all(!is.na(x)))]) | |
| } | |
| # sapply returns logical index vector |
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