Re: [ferret_users] Plotting with a paleo time scale

To: Olivier Marti <olivier.marti@xxxxxxxxxxxx>
Subject: Re: [ferret_users] Plotting with a paleo time scale
From: James Orr <James.Orr@xxxxxxxxxxxx>
Date: Wed, 10 Oct 2018 12:46:14 +0200 (CEST)
Cc: ferret <ferret_users@xxxxxxxx>
In-reply-to: <1F5F82E0-F99B-4910-82FA-1ACD6964577D@lsce.ipsl.fr>
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Olivier,

Here is a simple workaround if it is only a question of the y-axis label.Just replace your last command with the following 4 lines:

 
shade/nolab/set t2m[y=-2:2@ave,l=1:5000@sbx:250]
ppl ylab "Years before Present"
ppl xlab "Longitude"
ppl shade
 
James
 
On Wed, 10 Oct 2018, Olivier Marti wrote:

Hello,
 
I want to plot data using a paleo time scale : time is decreasing from a positive value to zero (present day).
 
The following script gives more details : 
 
USE"https://vesg.ipsl.upmc.fr/thredds/dodsC/store/p86mart/IPSLCM5A2/PROD/Holocene/TR5AS-Vlr01/ATM/Analyse/TS_YE/TR
5AS-Vlr01_20000101_79991231_1Y_t2m.nc"
 
! Model Years are from 2000 to 7999, which correspond to nothing :-(
! I can define a time axis starting at 1, which it's less confusing
LET nt = `t2m_yearmean,RETURN=lsize`
DEFINE AXIS/T=1:`nt`:1/UNITS="Years" YearFromStart
 
! But the labelling I want is Year before present (present being 1850)
LET/TITLE="Years BP"   YearBP=6000-T[GT=YearFromStart]+1
 
! I can not define the following axis because it's reversed
!DEFINE AXIS/T/UNITS="Years"/NAME="YearBP" YearBP
 
 
LET t2m = t2m_yearmean[GT=YearFromStart@ASN]-273.15
 
 
! How can I use YearBP as an axis to have proper labelling 
! of the time axis on the following plot  ?
SHADE  t2m[Y=-2:2@AVE,L=1:5000@SBX:250] 
 
 
Any idea ?
 
Thanks,
 
Olivier
 
-- 
Dr. Olivier Marti  - mailto:olivier.marti@xxxxxxxxxxxx
Laboratoire des Sciences du Climat et de l'Environnement
Institut Pierre Simon Laplace
Laboratoire CEA-CNRS-UVSQ  -  UMR 8212
Tel : +33 1 69 08 77 27 - Mob : +33 6 45 36 43 74
Fax : +33 1 69 08 30 73
<http://www.lsce.ipsl.fr/Pisp/olivier.marti>

 
--
LSCE/IPSL, Laboratoire des Sciences du Climat et de l'Environnement
CEA-CNRS-UVSQ
 
LSCE/IPSL, CEA Saclay           [ferret_users] Plotting with a paleo time scale
From: Olivier Marti




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