mogene10sttranscriptclusterMAPCOUNTSpackage:mogene10sttranscriptcluster.dbR Documentation

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_D_e_s_c_r_i_p_t_i_o_n:

     mogene10sttranscriptclusterMAPCOUNTS provides the "map count"
     (i.e. the count of mapped keys) for each map in package
     mogene10sttranscriptcluster.db.

_D_e_t_a_i_l_s:

     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.

_S_e_e _A_l_s_o:

     'mappedkeys', 'count.mappedkeys', 'checkMAPCOUNTS'

_E_x_a_m_p_l_e_s:

       mogene10sttranscriptclusterMAPCOUNTS
       mapnames <- names(mogene10sttranscriptclusterMAPCOUNTS)
       mogene10sttranscriptclusterMAPCOUNTS[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 mogene10sttranscriptcluster.db
       checkMAPCOUNTS("mogene10sttranscriptcluster.db")

