[ncl-talk] label bar title position (wrf)

[Matt Masarik]

Hi Mary,

thanks a lot for your response.   I was able to run both scripts.   The gsn
script gives a little bit better alignment than
the wrf version.

My impression is the wrf* routines simplify aspects of working with wrfout
files, but to get that you must compromise
on some fine tuning -- wrf* doesn't seem to respond to setting Title
resources, either.  For the time being I'll probably
use your approach with the gsn* routines.

Thanks again for the reply and the scripts!
Matt

On Thu, Jun 11, 2015 at 6:57 AM, Mary Haley <haley at ucar.edu> wrote:

> Hi Matt,
>
> Yes, it looks like the issue is that "wrf_contour" is trying to customize
> the location of the labelbar.  Unfortunately, I honestly don't understand
> why the title keeps moving drastically with seemingly little changes that I
> make.
>
> Here's a test script I was using, and I was able to get the title close,
> but it's still shifted.  I think it has something to do with the "extent"
> resources.  I'm hoping Dave will weigh in here.  I think you should be able
> to run this script yourself, just substitute your own WRF output file.
>
> If you continue to have problems with this, then you may want to consider
> using gsn_csm_contour_map to plot your data instead. I'll include a sample
> script below, after this one:
>
> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
> load "$NCARG_ROOT/lib/ncarg/nclscripts/wrf/WRFUserARW.ncl"
>
> begin
>   filename = "wrfout_d03_2012-04-22_23_00_00.nc"
>   dir      = "$NCARGTEST/nclscripts/wrf_files/"
>   a = addfile(dir + filename,"r")
>
>   td   = wrf_user_getvar(a,"td",0)    ; 3D td
>
>   td2  = td(0,:,:)                    ; Use lowest Td at time zero
>
>   td_f = 1.8*td2+32.                   ; Turn temperature into Fahrenheit
>
>
>   wks = gsn_open_wks("x11","test")
>
>   td_f at description = "Surface Dew Point Temp"
>   td_f at units       = "F"
>
>   opts                            = True
>   opts at cnFillOn                   = True
>   opts at cnLinesOn                  = False
>   opts at cnLineLabelsOn             = False
>   opts at ContourParameters          = (/ -20., 90., 5./)
>   opts at lbTitleOn         = True
>   opts at lbTitleString     = td_f at units
>   opts at lbTitlePosition   = "Right"
>   opts at lbTitleDirection  = "Across"
>   opts at lbTitleOffsetF    =  -0.08
>   opts at lbTitleJust       =  "CenterRight"
> ; opts at lbTitleFontHeightF= .015
>
> ; opts at lbTitleExtentF = 0.55
>
>
>   contour_td = wrf_contour(a,wks,td_f,opts)
>
>   pltres = True
>   mpres  = True
>   plot   = wrf_map_overlays(a,wks,(/contour_td/),pltres,mpres)
> end
>
> Here's a similar plot, using gsn_csm_contour_map. We have more examples at:
>
> http://www.ncl.ucar.edu/Applications/wrfgsn.shtml
>
>
> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
> load "$NCARG_ROOT/lib/ncarg/nclscripts/wrf/WRFUserARW.ncl"
>
> begin
>   filename = "wrfout_d03_2012-04-22_23_00_00.nc"
>   dir      = "$NCARGTEST/nclscripts/wrf_files/"
>   a = addfile(dir + filename,"r")
>
>   td   = wrf_user_getvar(a,"td",0)    ; 3D td
>
>   td2  = td(0,:,:)                    ; Use lowest Td at time zero
>                 td_f = 1.8*td2+32.                   ; Turn temperature
> into Fahrenheit
>
>   wks = gsn_open_wks("x11","test")
>
>   td_f at description = "Surface Dew Point Temp"
>   td_f at units       = "F"
>
>   opts                            = True
>   opts at cnFillOn                   = True
>   opts at cnLinesOn                  = False
>   opts at cnLineLabelsOn             = False
>   opts at cnLevelSelectionMode       = "ExplicitLevels"
>   opts at cnLevels                   = ispan(-20,90,5)
>   opts at lbTitleOn                  = True
>   opts at lbTitleString              = td_f at units
>   opts at lbTitlePosition            = "Right"
>   opts at lbTitleDirection           = "Across"
>   opts at lbTitleOffsetF             =  -0.09
>   opts at lbTitleJust                =  "CenterRight"
>   opts at lbTitleFontHeightF          = 0.015
>
> ; opts at lbTitleFontHeightF= .015                ; make title smaller
>                 ; opts at lbTitleExtentF = 0.55
>
>
>   opts = wrf_map_resources(a,opts)
>   opts at tfDoNDCOverlay = True
>
>   plot = gsn_csm_contour_map(wks,td_f,opts)
> end
>
> On Wed, Jun 10, 2015 at 4:30 PM, Matt Masarik <mattmasarik at boisestate.edu>
> wrote:
>
>> Hi All,                     (version 6.3.0)
>>
>> I'm trying to place the title string for a plot label bar, just to the
>> right of it, like in this image:
>>
>>   https://www.ncl.ucar.edu/Applications/Images/lb_4_lg.png
>>
>> Though my output looks like (see attached .png).  The relevant resources
>> I am setting
>> are:
>>
>>   cnres at lbTitleOn           = True
>>   cnres at lbTitleString      = slp at units
>>   cnres at lbTitlePosition   = "Right"
>>   cnres at lbTitleDirection  = "Across"
>>
>> The resources are set the same as in the example.  Though the example uses
>>
>>   gsn_csm_contour_map_ce()
>>
>> and I am using
>>
>>   wrf_contour() & wf_map_overlays().
>>
>> Is the issue due to using the wrf_... routines vs. the gsn_csm...
>> routine?  If so, is there
>> a work-around to get the desired positioning?
>>
>> Thanks,
>> Matt
>>
>>
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