A parallel coordinate map is a way to show multidimensional problems. The map appears confusing, but is useful when identifying outliers. Each variable being compared is found on the x- axis. When the lines are close together, it is high correlation. The example parallel coordinate map above shows a map for nine selected genes labeled across the x-axis.
http://vis.lbl.gov/Vignettes/Drosophila/index.html
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