contrasting.rainbow: Rainbow of colours permuted to maximise contrast.
In tobyjohnson/gtx: Genetics ToolboX

Description Usage Arguments Details Value Author(s) Examples

Returns a rainbow of colours, permuted so that adjacent elements constrast each other as much as possible.

1	contrasting.rainbow(x, ...)

`x`	number of colours in the rainbow.
`...`	other arguments to be passed to `rainbow`.

The permutation is chosen by finding the largest coprime of x that is not greater than x/2, and using that coprime as an increment size to cycle through the normal rainbow.

A vector of colours of length x.

Toby Johnson Toby.x.Johnson@gsk.com

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## contrasting colours suitable for Manhattan plot for 22 autosomes
plot(1:22, rep(1, 22), pch = 22, cex = 2, ann = FALSE, 
     yaxt = "n", bg = contrasting.rainbow(22))