assessSD              package:affycomp              R Documentation

_S_D _A_s_s_e_s_s_m_e_n_t _f_u_n_c_t_i_o_n_s

_D_e_s_c_r_i_p_t_i_o_n:

     Assessment function for standard deviation estimates. Takes a
     dilution data 'exprSet-class' and returns a list with necessary
     information to create assessment plot.

_U_s_a_g_e:

     assessSD(exprset,method.name=NULL,logx=FALSE)

_A_r_g_u_m_e_n_t_s:

 exprset: An 'exprSet-class' containing exrpession measures for 
          Affymetrix's spike-in experiment.

method.name: Name of expression measure being assessed.

    logx: Logical. If 'TRUE' expression is logged for plot. See
          details.

_D_e_t_a_i_l_s:

     'assessSD' does the assessment for Figure 7. This requires the
     'exprSet' to have standard error estaimtes for the expression
     measure. Some expression (such as dChip) will have SEs for the
     original scale. Others, like RMA will have them for the log scale.
     For orignal scales, making 'logx=TRUE' is recommended.

_V_a_l_u_e:

     Lists with the necessary information to make the Figures.

_A_u_t_h_o_r(_s):

     Rafael A. Irizarry

