Roberts2005AnnotationMAPCOUNTS {Roberts2005Annotation.db} | R Documentation |
Roberts2005AnnotationMAPCOUNTS provides the "map count" (i.e. the count of mapped keys) for each map in package Roberts2005Annotation.db.
This "map count" information is precalculated and stored in the package
annotation DB. This allows some quality control and is used by the
checkMAPCOUNTS
function defined in
AnnotationDbi to compare and validate different methods (like
count.mappedkeys(x)
or sum(!is.na(as.list(x)))
)
for getting the "map count" of a given map.
mappedkeys
,
count.mappedkeys
,
checkMAPCOUNTS
Roberts2005AnnotationMAPCOUNTS mapnames <- names(Roberts2005AnnotationMAPCOUNTS) Roberts2005AnnotationMAPCOUNTS[mapnames[1]] x <- get(mapnames[1]) sum(!is.na(as.list(x))) count.mappedkeys(x) # much faster! ## Check the "map count" of all the maps in package Roberts2005Annotation.db checkMAPCOUNTS("Roberts2005Annotation.db")