[ncl-talk] Trouble Reading Simple nc file

[Barry Lynn]

Yes, thanks for reminding me!

I took a program that worked and tried to read a different file and
variables, which I will panel later.

The clocks changed here...

Barry

On Sun, Oct 29, 2017 at 5:25 PM, Mary Haley <haley at ucar.edu> wrote:

> Barry,
>
> You are trying to print the variables without reading them off the file
> first.  You have:
>
>   printVarSummary(elevation)
>   printVarSummary(rays_time)
>   printMinMax(DigitalInstantaneousPrecipitationRate_RAW,False)
>   printMinMax(DigitalInstantaneousPrecipitationRate,False)
>
> These are indeed all variables on the file, but you need to read them off
> the file before you can do a printVarSummary on them:
>
>   printVarSummary(f->elevation)
>   printVarSummary(f->rays_time)
>   printMinMax(f->DigitalInstantaneousPrecipitationRate_RAW,False)
>   printMinMax(f->DigitalInstantaneousPrecipitationRate,False)
>
> or:
>
>   elevation = f->elevation
>   rays_time = f->rays_time
>   dipr_raw  = f->DigitalInstantaneousPrecipitationRate_RAW
>   dipr      = f->DigitalInstantaneousPrecipitationRate
>
>   printVarSummary(elevation)
>   printVarSummary(rays_time)
>   printMinMax(elevation,0)
>   printMinMax(rays_time,0)
>   printMinMax(dipr_raw,0)
>   printMinMax(dipr,0)
>
> You will note that dipr is all NaNs. You need to replace the NaNs with
> missing values:
>
> ;---Replace NaNs with missing values
>
>   dipr at _FillValue = default_fillvalue(typeof(dipr))
>   replace_ieeenan (dipr,dipr at _FillValue,0)
>
> Finally,
>
> You need to fix the do loop to go from 0 to n_files-1:
>
>   do i_file = 0,n_files-1
>
> Also, none of the paneling works because none of the plots have been
> created.  I assume this is a work in progress.
>
> Good luck,
>
>
> --Mary
>
> On Sun, Oct 29, 2017 at 9:00 AM, Barry Lynn <barry.h.lynn at gmail.com>
> wrote:
>
>> Hi:
>>
>> I am trying to access the variables in this file.  I have printed them
>> out and copied them to the ncl printVarSummary/printMinMax commands, but I
>> get an error.
>>
>> Since the variables (and others) are present, I don't see a way around
>> this.  Thank you for your help,
>>
>> Barry
>>
>> (0) elevation
>>
>> (1) azimuth
>>
>> (2) gate
>>
>> (3) latitude
>>
>> (4) longitude
>>
>> (5) altitude
>>
>> (6) rays_time
>>
>> (7) DigitalInstantaneousPrecipitationRate_RAW
>>
>> (8) DigitalInstantaneousPrecipitationRate
>>
>> fatal:Variable (elevation) is undefined
>>
>> fatal:["Execute.c":8575]:Execute: Error occurred at or near line 18 in
>> file ./read_nc_file.ncl
>>
>> --
>> Barry H. Lynn, Ph.D
>> Senior Lecturer,
>> The Institute of the Earth Science,
>> The Hebrew University of Jerusalem,
>> Givat Ram, Jerusalem 91904, Israel
>> Tel: 972 547 231 170
>> Fax: (972)-25662581
>>
>> C.E.O, Weather It Is, LTD
>> Weather and Climate Focus
>> http://weather-it-is.com
>> Jerusalem, Israel
>> Local: 02 930 9525
>> Cell: 054 7 231 170
>> Int-IS: x972 2 930 9525
>> US 914 432 3108 <(914)%20432-3108>
>>
>> _______________________________________________
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>>
>


-- 
Barry H. Lynn, Ph.D
Senior Lecturer,
The Institute of the Earth Science,
The Hebrew University of Jerusalem,
Givat Ram, Jerusalem 91904, Israel
Tel: 972 547 231 170
Fax: (972)-25662581

C.E.O, Weather It Is, LTD
Weather and Climate Focus
http://weather-it-is.com
Jerusalem, Israel
Local: 02 930 9525
Cell: 054 7 231 170
Int-IS: x972 2 930 9525
US 914 432 3108
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