Table 4.

Similarity matrix of the terminal bulb worm aging

Similarity Matrix
	day 0	day 2	day 4	day 6	day 8	day 10	day 12
day 0	1.00	0.66	0.63	0.59	0.63	0.55	0.58
day 2	0.68	1.00	1.00	0.99	0.95	0.76	0.65
day 4	0.64	0.93	1.00	1.00	0.97	0.82	0.71
day 6	0.55	0.84	0.96	1.00	1.00	0.89	0.75
day 8	0.55	0.77	0.89	0.93	1.00	0.84	0.71
day 10	0.53	0.52	0.70	0.63	0.77	1.00	0.98
day 12	0.49	0.48	0.65	0.58	0.68	0.94	1.00

Each class consists of microscopy images of the terminal bulb of C. elegans nematodes taken at ages 0, 2, 4, 6, 8, 10, 12 days. As the table shows, the similarity values are higher for neighboring age groups. The dataset can be downloaded at http://ome.grc.nia.nih.gov/iicbu2008/terminalbulb.tar.gz.