is.annpkg              package:annaffy              R Documentation

_D_e_t_e_r_m_i_n_e _i_f _p_a_c_k_a_g_e_s _c_o_n_t_a_i_n _a_n_n_o_t_a_t_i_o_n

_D_e_s_c_r_i_p_t_i_o_n:

     Checks to see that the given packages contain all the necessary
     annotation environments to be usable by annaffy.

_U_s_a_g_e:

       is.annpkg(packages, lib.loc = NULL)

_A_r_g_u_m_e_n_t_s:

packages: character vector containing package names to check

 lib.loc: a character vector with path names of R libraries, or 'NULL'.
          The default value of 'NULL' corresponds to all libraries
          currently known. If the default is used, the loaded packages
          are searched before the libraries. 

_V_a_l_u_e:

     A logical vector indicating whether the packages contain
     annotation data.

_A_u_t_h_o_r(_s):

     Colin A. Smith, annaffy@colinsmith.org

_E_x_a_m_p_l_e_s:

     pkgnames <- installed.packages()[,"Package"]
     pkgnames[is.annpkg(pkgnames)]