Figure 8

The cdc15 yeast cell-cycle data set. (a) Error bars about the eigenvalues obtained from the covariance matrix of the cdc15 yeast cell-cycle data set illustrating North et al. (1982) "rule of thumb" estimate with δ = 1.5. The spacing between the second and third eigenvalues indicate a possible degenerate subspace spanned by the associated eigenvectors, (b) is a graph of the broken stick model (circles) plotted against the eigenvalues (bars) obtained from the covariance matrix of the yeast cdc15 data set. The broken stick model (and the modified broken stick model) indicate a dimension of four.