mi16codMAPCOUNTS {mi16cod.db} | R Documentation

## Number of mapped keys for the maps in package mi16cod.db

### Description

mi16codMAPCOUNTS provides the "map count" (i.e. the count of mapped keys) for each map in package mi16cod.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

      mi16codMAPCOUNTS
      mapnames <- names(mi16codMAPCOUNTS)
      mi16codMAPCOUNTS[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 mi16cod.db
      checkMAPCOUNTS("mi16cod.db")

[Package mi16cod.db version 2.0.1 Index]