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2004 Sep 25
2
Strange behavior of is.na() on lists
...1] 0 [1] 140897024 [1] 134567568 [1] 1 [1] 1953720684 [1] 145687400 [1] 1886352499 > This is a very strange thing. The result is similar when applying is.na() on more complex lists: list(list(list(.....)). A concrete example where I found this behavior is the following list: > str(as.list(hgu95av2GO)[1:5]) List of 5 $ 1114_at :List of 6 ..$ GO:0005125:List of 3 .. ..$ GOID : chr "GO:0005125" .. ..$ Evidence: chr "IEA" .. ..$ Ontology: chr "MF" ................................... ..$ GO:0040007:List of 3 .. ..$ GOID : chr "GO:0040007&qu...