colon                 package:lemma                 R Documentation

_T_h_e _c_o_l_o_n _c_a_n_c_e_r _d_a_t_a _s_e_t (_A_l_o_n _e_t _a_l., _1_9_9_9)

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

     The data analyzed by Alon et al. (1999) consists of 2000 ESTs in
     40 tumor and 22 normal colon tissue samples. Of the 40 patients
     involved in the study, 22 supplied both tumor and normal tissue
     samples. The normalized data was downloaded from 
      http://microarray.princeton.edu/oncology/affydata/index.html and
     was further transformed by taking the log2 of the expression data.

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

     colon

_F_o_r_m_a_t:

     A data frame containing 2,000 rows and 64 columns.  The first
     column contains the gene IDs, the second column contains the gene
     names.  Columns 3-24 contain the reponses for the 22 control
     samples, and columns 25-64 contain the reponses for the 40
     treatment samples.

_R_e_f_e_r_e_n_c_e_s:

     Alon, Barkai, Notterman, Gish, Ybarra, Mack and Levine (1999).
     Broad patterns of gene expression revealed by clustering analysis
     of tumor and normal colon tissues probed by oligonucleotide
     arrays. Proceedings of the National Academy of Sciences, 96
     6745-6750.

