RE: [ferret_users] WRF output negative values

To: afwande juliet <afwandej965@xxxxxxxxx>, "Ansley C. Manke" <ansley.b.manke@xxxxxxxx>

Subject: RE: [ferret_users] WRF output negative values

From: "Kaduk, Jorg D. (Dr.)" <jk61@xxxxxxxxxxxxxxx>

Date: Wed, 10 Feb 2016 22:16:35 +0000

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Thread-topic: [ferret_users] WRF output negative values

Hello,

well, the data are the data and maybe that patterning is something interesting to explore.

If you want to make it look nicer you might want to go back to the range of 30 for each level instead of 15.

Best wishes,

Joerg

From: owner-ferret_users@xxxxxxxx [owner-ferret_users@xxxxxxxx] on behalf of afwande juliet [afwandej965@xxxxxxxxx]
Sent: 10 February 2016 20:58
To: Ansley C. Manke
Cc: ferret_users
Subject: Re: [ferret_users] WRF output negative values

Thanks all

the negative values disapeared

but there is alot of noise in the spatial distribution of rainfall;

look how the plot becomes very nasty

how can i reduce this

This how I do it
yes?let rainT=rainc+rainnc
yes? fill/k=273/hlim=22:54/vlim=-12:25/levels=(0,120,15)(inf) rainT, xlong,xlat
yes? go land 1 "" 1
yes? frame/file=test.gif

On Wed, Feb 10, 2016 at 9:10 PM, Ansley C. Manke <ansley.b.manke@xxxxxxxx> wrote:

hi,
You can use the /LEVELS qualifier to customize the contour levels on any Ferret plot.
http://ferret.pmel.noaa.gov/Ferret/documentation/users-guide/customizing-plots/CONTOURING#_VPINDEXENTRY_852

Here are a couple of syntax examples

yes? ! use variance-based levels, with the smallest being 0yes? fill/levels=v,0min wrf

yes? ! use levels from 0 to 105 with a delta of 15,yes? ! and any larger data represented by a single coloryes? fill/levels=(0,105,15)(inf) wrf
-Ansley

On 2/10/2016 8:47 AM, afwande juliet wrote:

Hi all

I am plotting rainfall from wrfoutput but the scale has negative values.

How can i remove the negative values using ferret so that Only values from 0> are plotted

attached is plot with negative scales