Sunday, December 5, 2010

Similarity matrix


http://www.biomedcentral.com/1471-2164/8/353/figure/F5?highres=y
A similarity matrix shows exactly what its name implies: the similarity between variable along a scale. Similarities are visualized by varying the colors of the boxes. This particular matrix is from a study on gene expression. Data pairs with significant similarity are shown in dark red, while those with no significant similarity are white, the rest are gradients between. Color visualizations like this can allow a cartographer to display complex data in a simple way.

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