[ncl-talk] About [errno=1102]

[David Brown]

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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