07/17/14 UNDO package version 1.7.3 Fix a bug in function mixing_matrix_computation(). Add the function of comparing the pure expression profiles with the estimated expression profiles, and return the Pearson correlation coefficient. 05/02/14 UNDO package version 1.5.2 A bug in function calc_E1() is fixed. 05/01/14 UNDO package version 1.5.1 In this version, a PCA-based dimension reduction function is added so that users can deconvolute multiple samples in one run.