[ncl-talk] About [errno=1102]

[Mary Haley]

​I just realized we didn't have any examples of using "cnConstFEnableFill",
so I created a simple one (coneff_17.ncl):

http://www.ncl.ucar.edu/Applications/coneff.shtml#ex17

​--Mary


On Fri, Mar 10, 2017 at 12:10 PM, David Brown <dbrown at ucar.edu> wrote:

> Just to clarify this a bit, Dennis is of course correct that you need
> to look at your data. You will never see contour lines in a data field
> that is constant, but beginning with NCL 6.2.0, there is capability
> for performing fill of constant fields. This feature has been improved
> considerably for NCL 6.4.0. If you are doing a filled plot, you can
> enable fill of constant areas by setting the resource
> cnConstFEnableFill to True. Eventually the plan is to make this
> resource True by default, but for now it defaults to False.
>  -dave
>
> On Fri, Mar 10, 2017 at 7:49 AM, Dennis Shea <shea at ucar.edu> wrote:
> > Please look at your data
> >
> > [1]
> > Your script uses
> >       a = addfile("./wrfout_d01_2015-12-23_15:00:00.nc","r")
> > The file you sent is
> >                            wrfout_d01_2015-12-23_15_00_00
> >
> > Please note the 15:00:00 and you sent 15_00_00
> >
> > [2]
> > We have asked you before to use printVarSummary and/or printMinMax to
> 'look
> > at your data.' You constantly ignore that advice. Why??
> >
> >    if(isfilevar(a,"QVAPOR"))
> >       qv = wrf_user_getvar(a,"QVAPOR",it)
> >       qv = qv*1000.
> >       qv at units = "g/kg"
> > printMinMax(qv,0)         ; <========= added
> >     end if
> >     if(isfilevar(a,"QCLOUD"))
> >       qc = wrf_user_getvar(a,"QCLOUD",it)
> >       qc = qc*1000.
> >       qc at units = "g/kg"
> > printMinMax(qc,0)
> >     end if
> >     if(isfilevar(a,"QRAIN"))
> >       qr = wrf_user_getvar(a,"QRAIN",it)
> >       qr = qr*1000.
> >       qr at units = "g/kg"
> > printMinMax(qr,0)
> >     end if
> >     if(isfilevar(a,"QICE"))
> >       qi = wrf_user_getvar(a,"QICE",it)
> >       qi = qi*1000.
> >       qi at units = "g/kg"
> > printMinMax(qi,0)
> >     end if
> > =====================
> >
> > Output"
> >
> >  See http://www.ncl.ucar.edu/ for more details.
> >
> > (0)    Water vapor mixing ratio: min=0.00438449   max=18.061
> > (0)    Cloud water mixing ratio: min=0   max=0
> > (0)    Rain water mixing ratio: min=0   max=0
> >
> > So two of your variables are constant ... all zeros.
> >
> > The warning message
> >
> > warning:ContourPlotInitialize: scalar field is constant; ContourPlot not
> > possible:[errno=1102]
> >
> > Is telling you that the field(s) to be contoured are all one value ( 0.0
> > )and that it can not contour  a constant field.
> >
> > Did you even look at the png files you generated?
> >
> >
> > On Thu, Mar 9, 2017 at 11:40 PM, isakhar sakhar isakhar
> > <isakhar.inside13 at gmail.com> wrote:
> >>
> >> Dear NCL Team
> >>
> >> I am trying to plot cloud cover a region and I obtain the error as shown
> >> below
> >>
> >> warning:ContourPlotInitialize: scalar field is constant; ContourPlot not
> >> possible:[errno=1102]
> >> warning:ContourPlotInitialize: scalar field is constant; ContourPlot not
> >> possible:[errno=1102]
> >> warning:ContourPlotInitialize: scalar field is constant; ContourPlot not
> >> possible:[errno=1102]
> >> warning:ContourPlotInitialize: scalar field is constant; ContourPlot not
> >> possible:[errno=1102]
> >> warning:ContourPlotInitialize: scalar field is constant; ContourPlot not
> >> possible:[errno=1102]
> >> warning:ContourPlotInitialize: scalar field is constant; ContourPlot not
> >> possible:[errno=1102]
> >> warning:ContourPlotInitialize: scalar field is constant; ContourPlot not
> >> possible:[errno=1102]
> >> warning:ContourPlotInitialize: scalar field is constant; ContourPlot not
> >> possible:[errno=1102]
> >> warning:ContourPlotInitialize: scalar field is constant; ContourPlot not
> >> possible:[errno=1102]
> >> warning:ContourPlotInitialize: scalar field is constant; ContourPlot not
> >> possible:[errno=1102]
> >>
> >> Script file and wrfout file are in attachment.
> >>
> >> Thank you for any help.
> >>
> >> Regards,
> >> Soares
> >>
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> >
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