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



Same idea as Ryo (but I think not as intense colors at the ends). My opinion, it's better to have a light gray not white at the center of the range, so you can distinguish blanks (islands or land) from zero values.

It's easy to make these palettes; do them on the fly and experiment.

Billy K

 0   20   20  100
49   85   85   85
51   85   85   85
100 100   20   20

On 08 Jun 2010, at 7:52 AM, Aisling Dolan 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


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
William S. Kessler
NOAA / Pacific Marine Environmental Laboratory
7600 Sand Point Way NE
Seattle WA 98115 USA

william.s.kessler@xxxxxxxx
Tel: 206-526-6221
Fax: 206-526-6744
Web: http://www.pmel.noaa.gov/people/kessler



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