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Re: [ferret_users] Taylor diagram with RMSE ?
- To: Marina Chifflet <mchifflet@xxxxxxx>
- Subject: Re: [ferret_users] Taylor diagram with RMSE ?
- From: James Orr <James.Orr@xxxxxxxxxxxx>
- Date: Mon, 23 Jan 2012 14:10:34 +0100 (CET)
- Cc: ferret_users@xxxxxxxx
- In-reply-to: <5CD78996B8F8844D963C875D3159B94AD274AD@DSRCORREO.azti.local>
- References: <5CD78996B8F8844D963C875D3159B94AD274AD@DSRCORREO.azti.local>
- Sender: owner-ferret_users@xxxxxxxx
- User-agent: Alpine 2.00 (LFD 1167 2008-08-23)
Hi Marina,
You can add the RMS circles to a Taylor plot using the attached go
script, taylor_rmscircles.jnl. General usage is indicated in the go
script.
Here is a more concrete example:
let minrms = 0.4
let maxrms = 1.6
let steprms = 0.4
let maxsigma = 2
go taylor_rmscircles.jnl `minrms`
/dash=(0.2,0.1,0.2,0.1)/color=blue/thick=1 `maxrms` `steprms` 1.0
`maxsigma`
A good place to call this script is just after calling the taylor_frame
and taylor_rgraticule go scripts.
Good luck,
Jim
On Mon, 23 Jan 2012, Marina Chifflet wrote:
Hi ferreters,
I have done some Taylor diagrams with the ferret scripts from Patrick Brockmann (taylor_frame.jnl and taylor_polymark.jnl I
think).
The Ferret web site page for the taylor diagram is:
http://ferret.pmel.noaa.gov/Ferret/faq/taylor-diagrams/?searchterm=taylor
I attach an example: taylor_diag_ferret_script_example.jpg (jpg not very good, but just to show).
Unfortunately, I didnʼt find how to add the RMSE on the Taylor diagram.
Is it possible de add the RMSE semicircles on a Taylor diagram with Ferret? Has anybody already done that?
I attach an example done with Matlab: taylor_diag_rmse_example.jpg
Many thanks!
Regards,
_____________________________________________
Dr Marina Chifflet
AZTI - Tecnalia / Marine research Division
Herrera Kaia Portualde z/g
20110 Pasaia (Gipuzkoa) - Spain
Tel: 943 00 48 00 (ext. 890) - Fax: 946 572 555
e-mail: mchifflet@xxxxxxxxxxx
www.azti.es ; www.tecnalia.info
--
LSCE/IPSL, Laboratoire des Sciences du Climat et de l'Environnement
CEA-CNRS-UVSQ
LSCE/IPSL, CEA Saclay http://www.ipsl.jussieu.fr/~jomce
Bat. 712 - Orme mailto: James.Orr@xxxxxxxxxxxx
Point courrier 132
F-91191 Gif-sur-Yvette Cedex Phone: (33) (0)1 69 08 39 73
FRANCE Fax: (33) (0)1 69 08 30 73
\cancel mode verify
!**************************************************************
! Description: Plot RMS semicircles centered around data ref point on bottom axis
!
! Usage: go taylor_rmscircles rmin [PLOT qualifiers=/line=1] [rmax] [rdelta] [sigmadata] [maxsigma]
!
! arg 1: minimum radius for 1st RMS semicircle
! arg 2: plot command qualifiers
! arg 3: maximum radius last RMS semicircle
! arg 4: delta radius of RMS semicircles
! arg 5: standard deviation of data (or 1.0 in case of multi-variables with 1/sigma normalization)
! arg 6: maximum on radial axis of Taylor plot (along which the "Correlation" label is written
! - this is the same value as the 1st argument to taylor_frame.jnl
!
! Example:
! yes? go taylor_frame.jnl 2 0.25 " " "Standard Deviation (units)"
! yes? go taylor_rgraticule.jnl 0.5
! yes? go taylor_rgraticule.jnl 1.0 /line=2
! yes? go taylor_rgraticule.jnl 1.5
!
! yes? go taylor_frame.jnl 3 0.2 " " "Standard Deviation (units)"
! yes? go taylor_rgraticule.jnl 0.4 /DASH=(0.2,0.1,0.2,0.1)/COLOR=RED/THICK=2) 2.8 0.4
! yes? go taylor_rgraticule.jnl 0.2 /DASH=(0.2,0.1,0.2,0.1)/COLOR=BLACK/THICK=1 2.6 0.4
!
! Notes: In a Taylor diagram, there are concentric semicircles focused around the data reference
! point on the bottom axis. This go script adds this feature to those written by
! P. Brockmann and J. Orr to make Taylor plots in Ferret (see Ferret FAQ).
!
! Calls:
!
! Author: James Orr
! Contact: James.Orr@xxxxxx
! $Date: 2005/11/21 17:21:19 $
! $Name: $
! $Revision: 1.5 $
! History: Modified from taylor_rgraticule.jnl (by Patrick Brockmann)
! Modification:
!
!**************************************************************
let ME_rmin=$1
def sym ME_qualifiers=$2%/line=1%
let ME_rmax=$3%$1%
let ME_rdelta=$4%$1%
let ME_sigmadata=$5%$1%
let ME_maxsigma=$6%$1%
! Draw 1 circle for axis extreme (maximum radius)
! -----------------------------------------------
let ME_pi = atan(1.)*4.
let ME_deg2rad = 2*ME_pi/180
let ME_angle = (i-1)
!let ME_xx = cos(ME_pi*ME_angle/(100*2))
!let ME_yy = sin(ME_pi*ME_angle/(100*2))
let ME_xx = cos(ME_pi*ME_angle/(100))
let ME_yy = sin(ME_pi*ME_angle/(100))
let ME_nb = 1+(ME_rmax-ME_rmin)/ME_rdelta
let ME_rcurr = ME_rmin+(k-1)*ME_rdelta
! To mask values to the right of the "Correlation" line (maxsigma):
! Determine intersecting points of the two circles (Taylor Frame & each rms semicircle)
! See http://www.sonoma.edu/users/w/wilsonst/Papers/Geometry/circles/default.html
! --------------------------------------------------------------------------------
! ME_xi and ME_yi are the intersecting values (ME_yi not needed for masking below)
let ME_xi = ME_sigmadata/2 + (ME_maxsigma^2 - ME_rcurr^2) / (2*ME_sigmadata)
! let ME_yi = ( ((ME_maxsigma^2 - ME_rcurr^2) - ME_sigmadata^2)*(ME_sigmadata^2 - (ME_rcurr - ME_maxsigma)^2) )^0.5 / (2*ME_sigmadata)
! Coordinates for complete semicircles
let ME_xrms = ME_rcurr*ME_xx + ME_sigmadata !Add x offset = sigmadata
let ME_yrms = ME_rcurr*ME_yy
! Mask portion of semicircle to the right of the intersection point
let ME_xrmsm = if ME_xrms le ME_xi then ME_xrms !Mask off values that extend beyond angular axis max
let ME_yrmsm = if ME_xrms le ME_xi then ME_yrms !Mask off values that extend beyond angular axis max
repeat/k=1:`ME_nb`:1 ( plot/over/nolab/i=1:101/vs($ME_qualifiers) ME_xrmsm, ME_yrmsm )
!**************************************************************
cancel variable ME_*
cancel symbol ME_*
!**************************************************************
set mode verify
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