GOMFCHILDREN               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
_d_i_r_e_c_t _c_h_i_l_e_r_e_n

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

     GOMFCHILDREN mappes GO ids to the GO ids of their direct children
     under molecular function (MF). Direct children of a given GO id
     are those GO ids correponding to all the children nodes that have
     direct link to the node for the GO id of concern based on the
     directed acyclic graph defined by Gene Ontology Consortium. GO
     terms for children nodes are more specific than that for the
     parents

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

     This is an environment object with key and value pairs. GO ids are
     keys and the corresponding children GO ids are values. Values are
     vectors of length 1 or greater depending on whether the GO id of
     concern has only one or more children. GO ids that do not have any
     child 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 Consortium built: 2004-02-01.<URL:
     http://www.godatabase.org/dev/database/archive/2004-02-01/go_20040
     2-termdb.xml.gz>

     Package built: Wed Mar  3 16:27:29 2004

_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(GOMFCHILDREN)
         # Remove GO ids that do not have any children
         xx <- xx[!is.na(xx)]
         if(length(xx) > 0){
              # Get the first element
              xx[[1]]
              # Get more than one elements
              xx[1:3]
         }

