Re: warning:ContourPlotInitialize: scalar field is constant

Hi Vanucia,

If you are using NCL 6.2.0, you can try the new resource cnConstFEnableFill
to allow filling of cvery onstant fields. However, you probably need to
figure out why the 'media' variable appears to be constant. The values you
are working with are very small. Perhaps you should scale them by some
power of 10 before calling dim_avg_n_Wrap.
 -dave


On Tue, Jul 22, 2014 at 12:43 PM, Vanúcia Schumacher <
vanucia-schumacher@hotmail.com> wrote:

> Hi users,
>
> I'm using satellite data, in format .bin and used the exemple the NCL to
> pass to format. cn, the error appears:
>
>
> Variable: t
> Type: float
> Total Size: 24105600 bytes
> 6026400 values
> Number of Dimensions: 3
> Dimensions and sizes: [time | 372] x [lat | 90] x [lon | 180]
> Coordinates:
> time: [1..372]
> lat: [-40..-90]
> lon: [-180..180]
> Number Of Attributes: 1
> _FillValue : 9.96921e+36
>
> Variable: media
> Type: float
> Total Size: 64800 bytes
> 16200 values
> Number of Dimensions: 2
> Dimensions and sizes: [lat | 90] x [lon | 180]
> Coordinates:
> lat: [-40..-90]
> lon: [-180..180]
> Number Of Attributes: 2
> _FillValue : 9.96921e+36
> average_op_ncl : dim_avg_n over dimension(s): time
>
> (0) t: min=1.4013e-43 max=4.13817e-36
>
> warning:ContourPlotInitialize: scalar field is constant; ContourPlot not
> possible:[errno=1102]
> warning:MapTransSetValues: latitude min exceeds max: exchanging values
>
>
>
> f = addfile("ice_nasa.nc","r")
> t =f->SLP
> t = where(t.eq.0,t@_FillValue,t)
> media= dim_avg_n_Wrap(t,0)
> print("t: min="+min(t)+" max="+max(t))
>
> res = True
> res@gsnAddCyclic = False
> res@mpMinLatF = -60
> res@mpMaxLatF = -90
> ...
> res@gsnPolar = "SH"
> plot = gsn_csm_contour_map_polar(wks,media,res)
>
>
> ---
> Vanúcia Schumacher
> Mestranda em Meteorologia - UFV
> Meteorologista -UFPel
> Departamento de Meteorologia Agrícola - DEA
> Cel: (31) 9978 2522
> DEA: (31) 3899 1890
>
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Received on Tue Jul 22 11:25:13 2014