Re: [ferret_users] Creating difference plots with white in the colour bar

[Izidine Pinto <izidinep@xxxxxxxxx>]

Hi Aisling,
This might help you
http://www.pmel.noaa.gov/maillists/tmap/ferret_users/fu_2010/msg00005.html

On 8 June 2010 16:52, Aisling Dolan <A.M.Dolan08@xxxxxxxxxxx> wrote:

Hi everyone,

I am trying to plot the difference between two global temperature fields.
e.g.
fill/lev=(-inf)(-5,5,1)(inf)/palette=blue_darkred temp_mm_1_5m[d=1,l=1] - temp_mm_1_5m[d=2,l=1]

Where the difference is less than 0.5 degrees Celsius, I wanted to shade the area in white - to imply that the difference is not significant.  For consistency with earlier work I would ideally like to incorporate white into the blue_darkred palette.

Does anyone know a simple way of doing this?  Or what combination of RGB colours make up blue_darkred do that I could try and create my own palette?

Apologies if this is obvious, but I am a ferret novice!

Thanks in advance,
Aisling


*********************************************************
Aisling M. Dolan
PhD Student
School of Earth & Environment

-- 
I.P.
"In these matters the only certainty is that nothing is certain".  Pliny the Elder (23 AD - 79 AD)