Transform color scale, but keep a nice legend with ggplot2

Question

I have seen somewhat similar questions to this, but I\'d like to ask my specific question as directly as I can:

I have a scatter plot with a \"z\" variable encoded i

Answer 1

Have a look at the package scales especially ?trans

I think that a transformation that maps the colour given the probability of getting the value or more extreme should be reasonable (basically pnorm(z))

I think that scale_colour_continuous(trans = probability_trans(distribution = 'norm') should work, but it throws warnings.

So I defined a new transformation (see ?trans_new)

I have to define a transformation and an inverse

library(scales)
norm_trans <- function(){
  trans_new('norm', function(x) pnorm(x), function(x) qnorm(x))
}

badVersion + geom_point() + scale_colour_continuous(trans = 'norm'))

Using the supplied probability_trans throws a warning and doesn't seem to work

# this throws a warning
badVersion + geom_point+
  scale_colour_continuous(trans = probability_trans(distribution = 'norm'))

## Warning message:
## In qfun(x, ...) : NaNs produced