[ncl-talk] Errors while trying to plot IAGOS data. Only the contour map plot, but the data is missing.

[David Brown]

You will never be able to contour the O3_PM variable from this file
because it contains only fill values:

ncl 0> f = addfile("IAGOS_timeseries_2013101819404151.nc","r")
ncl 1> printMinMax(f->O3_PM,0)
(0) Ozone mixing ratio (0.000000001) : min=-9999   max=-9999

Presumably this is what the attribute "availability" means: no valid
values for this variable.

Also for some reason your variable "var" contains only a single value.
There is no way to make a contour plot with only one point even if it
were a valid value. Since the only dimension in the file is a time
dimension, maybe this data set would be better displayed as a time
series x-y plot.
 -dave




On Wed, Sep 27, 2017 at 8:16 AM,  <najib.yusuf at carnasrda.com> wrote:
>
>  Dear Sirs,
>
>  I try to plot contour map of O3_PM variable from .nc IAGOS file but I am
> getting strange errors, I tried solving but couldn't get it. Kindly assist
> to guide. Attached is the file and the IAGOS.ncl as script.Thank you.
>
>  The summary of the print var is;
>
>  Variable: var
> Type: double
> Total Size: 8 bytes
>             1 values
> Number of Dimensions: 1
> Dimensions and sizes:   [UTC_time | 1]
> Coordinates:
> Number Of Attributes: 9
>   UTC_time :    70841
>   standard_name :       mole_fraction_of_ozone_in_air
>   long_name :   Ozone mixing ratio
>   comment :     Measured by MOZAIC package
>   units :       0.000000001
>   missing_value :       -9999
>   _FillValue :  -9999
>   scale_factor :         1
>   availability :         0
>
>
> Variable: var
> Type: double
> Total Size: 8 bytes
>             1 values
> Number of Dimensions: 1
> Dimensions and sizes:   [UTC_time | 1]
> Coordinates:
> Number Of Attributes: 9
>   UTC_time :    70841
>   standard_name :       mole_fraction_of_ozone_in_air
>   long_name :   Ozone mixing ratio
>   comment :     Measured by MOZAIC package
>   units :       0.000000001
>   missing_value :       -9999
>   _FillValue :  -9999
>   scale_factor :         1
>   availability :         0
> (0)     -9999
> (0)     min/max var = -9999/-9999
> fatal:MeshScalarFieldInitialize: Insufficient number of elements in
> sfDataArray
> fatal:Unable to initialize layer-Can't Create
> fatal:Unable to access object with id:-4
> fatal:Unable to access object with id:-4
> warning:Unable to add DataItem "(null)" to DataList "cnScalarFieldData"
> fatal:CompileDataList:DataList has no valid members
> warning:ContourPlotSetValues: cnLevelSpacingF value causes level count to
> exceed maximum: using AUTOMATICLEVELS mode
> ncl 48>
>
> Thank you
>
> Najib
>
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