[ncl-talk] Trouble Reading Simple nc file

[Mary Haley]

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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