listAttributes            package:biomaRt            R Documentation

_l_i_s_t_s _t_h_e _a_t_t_r_i_b_u_t_e_s _a_v_a_i_l_a_b_l_e _i_n _t_h_e _s_e_l_e_c_t_e_d _d_a_t_a_s_e_t

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

     Attributes are the outputs of a biomaRt query, they are the
     information we want to retrieve.  For example if we want to
     retrieve all entrez gene identifiers of genes located on
     chromosome X, entrezgene will be the attribute we use in the
     query.  The listAttributes function lists the available attributes
     in the selected dataset

_U_s_a_g_e:

     listAttributes(mart, group, category, showGroups = FALSE)

_A_r_g_u_m_e_n_t_s:

    mart: object of class Mart created using the useMart function

   group: Show only the attributes that belong to the specified
          attribute group.  To get a summary of the attribute groups
          set showGroups = TRUE or use the attributeSummary function

category: Show only the attributes that belong to the specified
          attribute category.  To get a summary of the attribute pages
          set showGroups = TRUE or use the attributeSummary function

showGroups: boolean to indicate if one wants to display the attribute
          categories and groups along with their names and descriptions

_A_u_t_h_o_r(_s):

     Steffen Durinck, http://www.stat.berkeley.edu/~steffen

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

     if(interactive()){
     ensembl = useMart("ensembl", dataset="hsapiens_gene_ensembl")
     listAttributes(ensembl)
     }

