Visualisation is pivotal for Science.
There are crucial visualisation pitfalls that hide, distort, or even falsify your data; the most-common pitfall is using the rainbow (a.k.a. jet) colour map. The rainbow colour map performs exceptionally-poorly in scientific tests: It distorts, hides, and falsifies your data, while additionally making it unreadable by colour-blind people or when printed in black and white.
A MatLab function to produce (colour-blind-friendly) colour arrays to colour multiple lines or markers in a plot.