Number of mapped keys for the maps in package reactome.db
reactomeMAPCOUNTS provides the "map count" (i.e. the count of mapped keys) for each map in package reactome.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.
reactomeMAPCOUNTS
mapnames <- names(reactomeMAPCOUNTS)
reactomeMAPCOUNTS[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 reactome.db
checkMAPCOUNTS("reactome.db")Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.