cdfGetFields           package:affxparser           R Documentation

_G_e_t_s _a _s_u_b_s_e_t _o_f _g_r_o_u_p_s _f_i_e_l_d_s _i_n _a _C_D_F _s_t_r_u_c_t_u_r_e

_D_e_s_c_r_i_p_t_i_o_n:

     Gets a subset of groups fields in a CDF structure.

     This 'function' is design to be used with 'applyCdfGroups'() on an
     Affymetrix Mapping (SNP) CDF 'list' structure.

_U_s_a_g_e:

     cdfGetFields(groups, fields, ...)

_A_r_g_u_m_e_n_t_s:

  groups: A 'list' of groups.

  fields: A 'character' 'vector' of names of fields to be returned.

     ...: Not used.

_D_e_t_a_i_l_s:

     Note that an error is _not_ generated for missing fields. Instead
     the field is returned with value 'NA'.  The reason for this is
     that it is much faster.

_V_a_l_u_e:

     Returns a 'list' structure of groups.

_A_u_t_h_o_r(_s):

     Henrik Bengtsson (<URL: http://www.braju.com/R/>)

_S_e_e _A_l_s_o:

     'applyCdfGroups'().

