Figure 4

Using the SVD to estimate the number of fundamental expression vectors required to efficiently span a profile set. (a) A set of 300 diverse expression profiles [19] was converted to a matrix of expression vectors and the singular values were computed, normalizing such that the first singular value was equal to 1. (b) A set of 173 profiles of various yeast environmental responses [28] were converted to a matrix of expression vectors and processed as in (a).