> On 5 Jun 2015, at 11:39 AM, Sourish Basu <sourish.b...@gmail.com> wrote: > > This problem is reasonably common for me, BTW. I can have a carbon monoxide > field with an average/background of 60 ppb, but variations from 30 to 550 > ppb. So I need a color scale which (a) is white at 60, and (b) shows small > variations below 60 and large variations above 60 with equal "clarity”.
If you need to see small changes at low values and they are equally important to large changes at high values, then taking the logarithm is often useful (or scaling your colorbar logarithmically). Cheers, Jody -- Jody Klymak http://web.uvic.ca/~jklymak/
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