hgu95av2MAPCOUNTS {hgu95av2.db} | R Documentation |
hgu95av2MAPCOUNTS provides the "map count" (i.e. the count of mapped keys) for each map in package hgu95av2.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
hgu95av2MAPCOUNTS mapnames <- names(hgu95av2MAPCOUNTS) hgu95av2MAPCOUNTS[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 hgu95av2.db checkMAPCOUNTS("hgu95av2.db")