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 _t_o _t_h_e_i_r _M_o_l_e_c_u_l_a_r _F_u_n_c_t_i_o_n _O_f_f_s_p_r_i_n_g

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

     This data set describes associations between GO molecular function
     (MF) terms and their offspring MF terms, based on the directed
     acyclic graph (DAG) defined by the Gene Ontology Consortium. The
     format is an R environment mapping the GO MF terms to all
     offspring terms, where an ancestor term is a more specific GO term
     that is preceded by the given GO term in the DAG (in other words,
     the children and all their children, etc.).

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

     Each GO MF term is mapped to a vector of offspring GO MF terms.

     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:
     ftp://ftp.geneontology.org/pub/go/godatabase/archive/latest>.
     Built: Build Information not available

     Package built: Wed Aug 29 09:09:17 2007

_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(GOMFOFFSPRING)
       # 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
       goids <- xx[1:2]
       }

