getEIC-methods             package:xcms             R Documentation

_G_e_t _e_x_t_r_a_c_t_e_d _i_o_n _c_h_r_o_m_a_t_o_g_r_a_m_s _f_o_r _s_p_e_c_i_f_i_e_d _m/_z _r_a_n_g_e_s

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

     Generate multiple extracted ion chromatograms for m/z values of
     interest.  For 'xcmsSet' objects, reread original raw data and
     apply precomputed retention time correction, if applicable.

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

  object: the 'xcmsRaw' or 'xcmsSet' object

 mzrange: either a two column matrix with minimum or maximum m/z or a
          matrix of any dimensions containing columns 'mzmin' and
          'mzmax' 

    step: step size to use for profile generation

 sampidx: integer vector with indicies of samples for which to get EICs 

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

     For 'xcmsRaw' objects, a matrix with a column for each 'mzmin',
     'mzmax' pair. Rows correspond to individual scans.

     For 'xcmsSet' objects, a list of matricies as described above, one
     for each sample.

_M_e_t_h_o_d_s:

     _o_b_j_e_c_t = "_x_c_m_s_R_a_w" 'getEIC(object, mzrange, step = 0.1)'

     _o_b_j_e_c_t = "_x_c_m_s_S_e_t" 'getEIC(object, mzrange, sampidx = seq(along =
          sampnames(object)))'

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

     'xcmsRaw-class', 'xcmsSet-class'

