Color legend in horizontal / vertical position (cbarn)

[Antoy Chang]

Douglas/all,
Thank you for your support, i manage to solve the problem. This is portion of my cbarn.gs used to plot my clour bar :
*********************************************************************************************************
*  Script to plot a colorbar
*
*  The script will assume a colorbar is wanted even if there is
*  not room -- it will plot on the side or the bottom if there is
*  room in either place, otherwise it will plot along the bottom and
*  overlay labels there if any.  This can be dealt with via
*  the 'set parea' command.  In version 2 the default parea will
*  be changed, but we want to guarantee upward compatibility in
*  sub-releases.
*
*
*       modifications by mike fiorino 940614
*       rvp added by diane stokes 20040729
*       cinc added by diane stokes 20050130
*
*       - the extreme colors are plotted as triangles
*       - the colors are boxed in white
*       - input arguments in during a run execution:
*
*       run cbarn cinc sf vert xmid ymid rvp
*
*       cinc - increment for labels
*       sf   - scale the whole bar 1.0 = original 0.5 half the size, etc.
*       vert - 0 FORCES a horizontal bar = 1 a vertical bar
*       xmid - the x position on the virtual page the center the bar
*       ymid - the x position on the virtual page the center the bar
*       rvp  - 1 resets virtual page (one colorbar for several plots)
*
*       if cinc is not specified, every color interval is labeled
*       if vert,xmid,ymid are not specified, they are selected
*       as in the original algorithm
*
*       if rvp is not specified, it is 0 (don't reset virtual page)
*******************************************************************************************************
if you can see, the cbarn arguments are cinc sf vert xmid ymid rvp, there is additional argument before the sf. in my script below i omit the cinc argument, i solve the problem by assign 1 for cinc argument. 
 
here is my script :
 'set grads off'
  'set parea 0.5 7.7 0.5 9.5'
  'set mpdset /usr/local/lib/grads/hires'
  'set map 1 1 2'
  'set annot 1'
  'set gxout shaded'
  'set clevs 'colndx
  'set ccols 'colevs
* 'd wht*1.25'
  'd wht'
  'run /usr/local/lib/grads/script/cbarn.gs 1.0 1 7.9 4.9'--->corrected cbarn.gs 1 1.0 1 7.9 4.9

  'set gxout vector'
  'set ccolor 1'
  'set arrscl 0.15'
  'define wamv=cos(0.0174532*wdir)'
  'define wamu=sin(0.0174532*wdir)'
  skp=4
  'd skip(wamu,'skp','skp');wamv'
  'set gxout contour'
  'set cint 1'
  'set clab forced'
  'set ccolor 0'
  'd mpr'
   'draw string 7.5 0.35 'metres 
 
But i don't know why the i encounter the problem since 2 days ago after using the same script for plotting since 2005.....
 
Regards,
Antoy


--- On Thu, 2/5/09, Douglas Clark <dbcl at ceh.ac.uk> wrote:

From: Douglas Clark <dbcl at ceh.ac.uk>
Subject: Re: Color legend in horizontal / vertical position (cbarn)
To: antoyc at yahoo.com
Date: Thursday, February 5, 2009, 5:33 PM

Sorry - just saw your later post in which you say the optional arguments
didn't work.
I've no idea.

Doug

>>> Douglas Clark 05/02/2009 09:28 >>>
Antoy,

No idea why the bar changes if everything else really is identical as you said.
Could be some hard-to-find quirk.

Can't you solve this using the optional arguments to cbarn?
Form cbarn.gs:

*       run cbarn sf vert xmid ymid
*
*       sf   - scale the whole bar 1.0 = original 0.5 half the size, etc.
*       vert - 0 FORCES a horizontal bar = 1 a vertical bar
*       xmid - the x position on the virtual page the center the bar
*       ymid - the x position on the virtual page the center the bar

So set vert=1 to ensure a vertical bar (and then xmid,ymid if it still moves
about at all).

Doug



>>> Antoy Chang <antoyc at yahoo.com> 05/02/2009 01:04 >>>
Hi everybody,
I have problem when displaying the 2 wave forecast using exactly the same
script but different color bar position (using cbarn) one is placed horizontally
while the other vertically. How to solve this?, i want to place both vertically,
the print area is exactly the same on both display. Why this inconsistency
happen?. Really appreciate your feedback.Thank You.
 
p/s : Look at the attached files.
 
--- On Wed, 2/4/09, Madhusoodanan M.S. <madhusoodanan at GMAIL.COM> wrote:

From: Madhusoodanan M.S. <madhusoodanan at GMAIL.COM>
Subject: Re: error in ctl file
To: GRADSUSR at LIST.CINECA.IT 
Date: Wednesday, February 4, 2009, 10:11 PM




hi,

your script appears to have some problems.

check the header of taux.cdf (ncdump -h taux.cdf ==> it will give nx and
ny.)

'set x 129.5 320.5'   ==> ??? longitude will vary from 0 359.5 (if
global) 
that means x will vary from 1 720 and
                 y              from 1 361 (if from 90S to 90N)

.ctl file to read the tauxobs.grd should be correctly made then.

cheers,
Madhu



 







 
'reinit'
'sdfopen taux.cdf'
'set gxout fwrite'
'set fwrite tauxobs.grd'
'set x 129.5 320.5' 
'set y 121.5 171.5' 
'set z 1'
'set t 1 24'
'd taux'
'disable fwrite'
 
and the data length in tauxobs.grd is 193*52*24*4, where nx=193, ny=52, and
t=24,
so, where is the error in file i am not getting it, that is it display the
variable for only time t=1, not for the other time,
please help me.
 
with redgards
 
anushri








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