hugene10stMAPCOUNTS {hugene10st.db}R Documentation

Number of mapped keys for the maps in package hugene10st.db

Description

hugene10stMAPCOUNTS provides the "map count" (i.e. the count of mapped keys) for each map in package hugene10st.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 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.

See Also

mappedkeys, count.mappedkeys, checkMAPCOUNTS

Examples

  hugene10stMAPCOUNTS
  mapnames <- names(hugene10stMAPCOUNTS)
  hugene10stMAPCOUNTS[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 hugene10st.db
  checkMAPCOUNTS("hugene10st.db")

[Package hugene10st.db version 1.0.2 Index]