GOMFOFFSPRING               package:GO               R Documentation

_A_n_n_o_t_a_t_i_o_n _o_f _G_O _i_d_e_n_t_i_f_i_e_r_s _b_y _t_h_e _G_O _i_d_e_n_t_i_f_i_e_r_s _o_f _t_h_e_i_r
_o_f_f_s_p_r_i_n_g

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

     This is an R environment (hash table) mapping GO ids to all the GO
     ids of their offspring under molecular function (MF). Offspring
     are defined as the direct or indirect children/grand children
     nodes of a given node for a GO id based on the directed acyclic
     graph defined by Gene Ontology Consortium. GO terms for offspring
     nodes are more specific

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

     GO ids are keys and the corresponding offspring GO ids are values.
     Values are vectors of GO ids for all the offspring of the key GO
     id. GO ids that do not have any offspring node are assigned NA as
     the values.  

     Molecular function is defined as the tasks performed by individual
     gene products; examples are transcription factor and DNA helicase
     as defined by Gene Ontology Consortium.  

     Mappings were based on data provided by:

     Gene Ontology:<URL:
     http://www.godatabase.org/dev/database/archive/2004-09-01/go_20040
     9-termdb.xml.gz>. Built: 2004-09-01

     Package built: Mon Jan 10 19:19:56 2005

_R_e_f_e_r_e_n_c_e_s:

     <URL: http://www.geneontology.org/> and <URL:
     http://www.ncbi.nlm.nih.gov/LocusLink>

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

       require("GO", character.only = TRUE) || stop("GO unavailable")
       # Convert the environment object to a list
       xx <- as.list(GOMFOFFSPRING)
       # Remove GO ids that do not have any offspring
       xx <- xx[!is.na(xx)]
       if(length(xx) > 0){
         # Get the offspring GO ids for the first two elents of xx
       goids <- xx[1:2]
       }

