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Table 5 Results for recovering the block constant structure in the MAPK microarray data [39]. (Left to Right) Recognition rates for: independently applied k-means, independent Gaussian mixture models (i-mix), alternating row and column hard assignment row column mixtures (rc-mix), sequentially optimized rc-mixtures (s-rc-mix) and variational optimization for rc-mixtures (v-rc-mix). We recover known, approximately block constant structure in a 36 × 67 element matrix with 7 row and 8 column classes.

From: Analyzing in situ gene expression in the mouse brain with image registration, feature extraction and block clustering

  k-means i-mix rc-mix s-rc-mix v-rc-mix
recognition rate .50 ± .01 .48 ± .01 .56 ± .01 .56 ± .01 .55 ± .01
time (sec.) .38 ± .01 .46 ± .01 3.8 ± .1 4.6 ± .4 195 ± 3