RefPlus-package           package:RefPlus           R Documentation

_R_M_A _b_a_s_e_d _o_n _r_e_f_e_r_e_n_c_e _m_i_c_r_o_a_r_r_a_y_s: _R_M_A+ _a_n_d _R_M_A++ _m_e_t_h_o_d_s

_D_e_s_c_r_i_p_t_i_o_n:

     RMA+ is an extenstion of the RMA algorithm that calculates the
     probeset  intensities of a microarray using a pre-stored RMA model
     fitted on previously  obtained microarrays, e.g. reference
     microarrays. RMA++ is a further extension  based on the RMA+
     method. This package depends on the affyPLM package.

_D_e_t_a_i_l_s:


       Package:  RefPlus
       Type:     Package
       Version:  1.2.0
       Date:     2006-10-25
       License:  GPL version 2 or newer

     Use 'rma.para' to obtain the reference quantiles and the probe
     effects from a reference set, then use 'rmaplus' to calculate the
     RMA+ intensities based  on the fitted reference quantiles and
     probe effects.

_A_u_t_h_o_r(_s):

     By Kai-Ming Chang(Kai-Ming.Chang@astrazeneca.com,
     kaiming@gmail.com)

_R_e_f_e_r_e_n_c_e_s:

     Chang,K.M., Harbron,C., South,M.C. (2006) An Exploration of 
     Extensions to the RMA Algorithm. (Submitted)

_E_x_a_m_p_l_e_s:

     ## Use affybatch.example in affy package
     data(affybatch.example)

     ##Calculate RMA intensities using the rma function.
     Ex0<-exprs(rma(affybatch.example))

     ## Background correct, estimate the probe effects, and calculate the 
     ## RMA intensities using rma.para function.
     Para<-rma.para(affybatch.example,bg=TRUE,exp=TRUE)
     Ex1<-Para[[3]]
      
     ## Calculate the RMA+ intensity using rmaplus function. 
     Ex2<-rmaplus(affybatch.example, rmapara=Para, bg = TRUE)

