\name{org.Gg.egMAPCOUNTS} \alias{org.Gg.egMAPCOUNTS} \title{Number of mapped keys for the maps in package org.Gg.eg.db} \description{ org.Gg.egMAPCOUNTS provides the "map count" (i.e. the count of mapped keys) for each map in package org.Gg.eg.db. } \details{ This "map count" information is precalculated and stored in the package annotation DB. This allows some quality control and is used by the \code{\link[AnnotationDbi:AnnDbPkg-checker]{checkMAPCOUNTS}} function defined in AnnotationDbi to compare and validate different methods (like \code{count.mappedkeys(x)} or \code{sum(!is.na(as.list(x)))}) for getting the "map count" of a given map. } \seealso{ \code{\link[AnnotationDbi:Bimap-keys]{mappedkeys}}, \code{\link[AnnotationDbi:Bimap-keys]{count.mappedkeys}}, \code{\link[AnnotationDbi:AnnDbPkg-checker]{checkMAPCOUNTS}} } \examples{ org.Gg.egMAPCOUNTS mapnames <- names(org.Gg.egMAPCOUNTS) org.Gg.egMAPCOUNTS[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 org.Gg.eg.db checkMAPCOUNTS("org.Gg.eg.db") } \keyword{datasets}