studyCenter               package:XDE               R Documentation

_C_e_n_t_e_r _t_h_e _e_x_p_r_e_s_s_i_o_n _v_a_l_u_e_s _i_n _a _s_t_u_d_y _t_o _z_e_r_o

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

     Centers each study in a list so that the average expression value
     of each stuy is zero

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

     studyCenter(object)

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

  object: An object of class 'ExpressionSetList'

_V_a_l_u_e:

     An object of class 'ExpressionSetList'

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

     R. Scharpf

_S_e_e _A_l_s_o:

     'geneCenter', 'ExpressionSetList-class'

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

       data(expressionSetList)
       centered <- studyCenter(expressionSetList)
       lapply(centered, function(object) round(mean(exprs(object)), 4))

