agSYMBOL                package:ag.db                R Documentation

_M_a_p _b_e_t_w_e_e_n _M_a_n_u_f_a_c_t_u_r_e_r _I_d_e_n_t_i_f_i_e_r_s _a_n_d _G_e_n_e _S_y_m_b_o_l_s

_D_e_s_c_r_i_p_t_i_o_n:

     agSYMBOL is an R object that provides mappings between
     manufacturer identifiers and gene abbreviations.

_D_e_t_a_i_l_s:

     Each manufacturer identifier is mapped to an abbreviation for the
     corresponding gene. An 'NA' is reported if there is no known
     abbreviation for a given gene.

     Symbols typically consist of 3 letters that define either a single
     gene (ABC) or multiple genes (ABC1, ABC2, ABC3). Gene symbols can
     be used as key words to query public databases such as Entrez
     Gene.

     Mappings were based on data provided by: Tair (
     ftp://ftp.arabidopsis.org/Genes/gene_aliases.20070806 ) on
     2007-Aug2

_R_e_f_e_r_e_n_c_e_s:

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

_E_x_a_m_p_l_e_s:

             x <- agSYMBOL
             # Get the probe identifiers that are mapped to a gene symbol
             mapped_probes <- mappedkeys(x)
             # Convert to a list
             xx <- as.list(x[mapped_probes])
             if(length(xx) > 0) {
               # Get the SYMBOL for the first five probes
               xx[1:5]
               # Get the first one
               xx[[1]]
             }

