GOCCOFFSPRING               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 _t_o _t_h_e_i_r _C_e_l_l_u_l_a_r _C_o_m_p_o_n_e_n_t _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 identifiers to
     all the GO identifiers of their offspring based on the  cellular
     component (CC) GO terms. Offspring are defined as the direct or
     indirect children/grand children nodes of a given node for a GO
     identifier based on the directed acyclic graph defined by Gene
     Ontology Consortium. GO terms for offspring nodes are more
     specific than that of the parent.

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

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

     Cellular component is defined as the subcellular structures,
     locations, and macromolecular complexes; examples include nucleus,
     telomere, and origin recognition complex as defined b y Gene
     Ontology Consortium. 

     Mappings were based on data provided:

     Gene Ontology:\<URL:
     ftp://ftp.geneontology.org/pub/go/godatabase/archive/latest>.
     Built: Build Information not available

     Package built: Mon Apr  7 09:09:39 2008

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

     <URL: http://www.geneontology.org/> and <URL:
     http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=gene>

_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(GOCCOFFSPRING)
       # Remove GO identifiers that do not have any offspring
       xx <- xx[!is.na(xx)]
       if(length(xx) > 0){
         # Get the offspring GO identifiers for the first two elents of xx
         goidentifiers <- xx[1:2]
       }

