Re: plotting wind between two values

I have attached the script (it is taken form example vector_3.ncl)
and I have also attached the data file (and It is also on the NCL website).
thanks in advance

On Sat, Apr 21, 2012 at 12:20 AM, Mary Haley <haley@ucar.edu> wrote:

> I will have to defer you to Dave Brown then. With the weekend coming up,
> we may not get an answer to you before Monday.
>
> It will help if you can provide a script and some data for Dave. See our
> ftp information at:
>
> http://www.ncl.ucar.edu/report_bug.shtml#HowToFTP
>
> --Mary
>
>
> On Apr 20, 2012, at 11:56 AM, ahmed lasheen wrote:
>
> > thnaks for your reply
> > I try it ,but it didnot work ,still all vectors of all magnitudes are
> rendered
> >
> > On Fri, Apr 20, 2012 at 7:34 PM, Mary Haley <haley@ucar.edu> wrote:
> > These vector levels do not represent absolute begin and end values of
> the vectors you want to see. They simply represent what vector levels to
> span through the full range of your data.
> >
> > Maybe what you need to set are vcMinMagnitudeF and vcMaxMagnitudeF.
> >
> > --Mary
> >
> >
> > On Apr 20, 2012, at 3:26 AM, ahmed lasheen wrote:
> >
> > > Hello
> > > My question is that i am trying to plot the wind values just between
> two values(e.g between 0 and 5 m/s)
> > > so that I used
> > > vcres@vcMinLevelValF = 0 ; m/s
> > > vcres@vcMaxLevelValF =5; m/s
> > > But it didn't work(all wind of all values are plotted not only the
> wind between these two values)
> > > I expect to see wind plotted only in some region which satisfy this
> criteria.
> > >
> > > thanks in advance
> > >
> > > On Fri, Apr 20, 2012 at 12:03 AM, Mary Haley <haley@ucar.edu> wrote:
> > > You need to be more specifc about what doesn't work. Do you mean the
> plot is incorrect? Are you getting an error when you run the script?
> > >
> > > You could try adding a spacing, just in case:
> > >
> > > vcres@vcLevelSpacingF = 1
> > >
> > >
> > > On Apr 18, 2012, at 10:12 AM, ahmed lasheen wrote:
> > >
> > > > Hello
> > > > I am trying to plot wind between two values using the resources
> > > > vcres@vcLevelSelectionMode ="ManualLevels"
> > > > vcres@vcMinLevelValF = 0
> > > > vcres@vcMaxLevelValF =5
> > > > but it doesnot work
> > > > any suggestion?
> > > > the script , I download it from the NCL website and i just add the
> previous three line to it .
> > > >
> ----------------------------------------------------------------------
> > > > ; vector_3.ncl
> > > > ;
> > > > ; Concepts illustrated:
> > > > ; - Drawing a black-and-white vector plot over a cylindrical
> equidistant map
> > > > ; - Adding a time stamp to a plot
> > > > ; - Thinning vectors using a minimum distance resource
> > > > ; - Moving the vector reference annotation to the top right of the
> plot
> > > >
> ;----------------------------------------------------------------------
> > > > load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
> > > > load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
> > > > load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"
> > > > load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/shea_util.ncl"
> > > > ;************************************************
> > > > begin
> > > > ;************************************************
> > > > ; read in netCDF file
> > > > ;************************************************
> > > > a = addfile("uv300.nc","r")
> > > > ;************************************************
> > > > ; read in zonal [u] and meridional [v] winds (July)
> > > > ;************************************************
> > > > u = a->U(1,:,:)
> > > > v = a->V(1,:,:)
> > > > ;************************************************
> > > > ; create plot
> > > > ;************************************************
> > > > wks = gsn_open_wks("x11","vector") ; open a ps file
> > > >
> > > > vcres = True ; plot mods
> desired
> > > > vcres@gsnFrame = False ; so we can draw
> time stamp
> > > > vcres@vcRefAnnoOrthogonalPosF = -1.0 ; move ref
> vector up
> > > > vcres@vcRefMagnitudeF = 10.0 ; define vector
> ref mag
> > > > vcres@vcRefLengthF = 0.045 ; define length
> of vec ref
> > > > vcres@vcGlyphStyle = "CurlyVector" ; turn on curly
> vectors
> > > > vcres@vcMinDistanceF = 0.017
> > > >
> > > > vcres@vcLevelSelectionMode ="ManualLevels"
> > > > vcres@vcMinLevelValF = 0 ; m/s
> > > > vcres@vcMaxLevelValF =5; m/s
> > > >
> > > > vector = gsn_csm_vector_map_ce(wks,u,v,vcres)
> > > > ;************************************************
> > > > ; add time stamp to plot
> > > > ;************************************************
> > > > infoTimeStamp(wks,0.025,"uv300.nc") ; arguments are
> workstation
> > > > ; size of text desired,
> and
> > > > ; right string.
> > > > frame (wks)
> > > > end
> > > >
> > > > thanks in advance
> > > > --
> > > > ===============
> > > > Ahmed Lasheen
> > > > Junior researcher at Cairo Numerical Weather Prediction Center
> (CNWPC)
> > > > Egyptian Meteorological Authority(EMA)
> > > > Cairo,Egypt
> > > > ===============
> > > >
> > > > _______________________________________________
> > > > ncl-talk mailing list
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> > > > http://mailman.ucar.edu/mailman/listinfo/ncl-talk
> > >
> > >
> > >
> > >
> > > --
> > > ===============
> > > Ahmed Lasheen
> > > Junior researcher at Cairo Numerical Weather Prediction Center (CNWPC)
> > > Egyptian Meteorological Authority(EMA)
> > > Cairo,Egypt
> > > ===============
> > >
> > > _______________________________________________
> > > ncl-talk mailing list
> > > List instructions, subscriber options, unsubscribe:
> > > http://mailman.ucar.edu/mailman/listinfo/ncl-talk
> >
> >
> >
> >
> > --
> > ===============
> > Ahmed Lasheen
> > Junior researcher at Cairo Numerical Weather Prediction Center (CNWPC)
> > Egyptian Meteorological Authority(EMA)
> > Cairo,Egypt
> > ===============
> >
> > _______________________________________________
> > ncl-talk mailing list
> > List instructions, subscriber options, unsubscribe:
> > http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>
>

-- 
===============
Ahmed Lasheen
Junior researcher at Cairo Numerical Weather Prediction Center (CNWPC)
Egyptian Meteorological Authority(EMA)
Cairo,Egypt
===============