[ncl-talk] Attributes

[Muhammad Omer Mughal]

Hi Dennis


Thanks


Muhammad Omer Mughal
MSc BSc Mechanical Engineering
PhD  Research Scholar
Remote Sensing and Satellite Research Group
Department of Imaging and Applied Physics
Curtin University

Curtin University
Tel | +61 8 9266 7962
Fax | +61 8 9266 2377
Mobile | 0470 237 525

Email | m.mughal1 at postgrad.curtin.edu.au<mailto:m.lynch at curtin.edu.au>
Web | http://curtin.edu.au<http://curtin.edu.au/>

Curtin University is a trademark of Curtin University of Technology.
CRICOS Provider Code 00301J (WA), 02637B (NSW)


________________________________
From: Dennis Shea <shea at ucar.edu>
Sent: Friday, 9 December 2016 12:09:06 PM
To: Muhammad Omer Mughal
Cc: ncl-talk at ucar.edu
Subject: Re: [ncl-talk] Attributes

Please read the documentation at (say):
    http://www.ncl.ucar.edu/Document/Manuals/

Mini-Language Manual
or the
DKRZ Tutorial

Look at the @ for attribute
==============================
   f = addfile("uv300.nc<http://uv300.nc>","r")
   TITLE = f at title
or
   title  = f at title
or
   foo = f at title

==========================


netcdf uv300 {
dimensions:
        lat = 64 ;
        lon = 128 ;
        time = 2 ;
variables:
        float lat(lat) ;
                lat:short_name = "lat" ;
                lat:long_name = "latitude" ;
                lat:units = "degrees_north" ;
        float lon(lon) ;
                lon:units = "degrees_east" ;
                lon:long_name = "longitude" ;
                lon:short_name = "lon" ;
        float gw(lat) ;
                gw:long_name = "gaussian weights" ;
                gw:short_name = "gws" ;
                gw:units = "dimensionless" ;
        int time(time) ;
                time:long_name = "Month of Year" ;
                time:short_name = "Mo" ;
                time:units = "month" ;
        float U(time, lat, lon) ;
                U:_FillValue = -999.f ;
                U:long_name = "Zonal Wind" ;
                U:short_name = "U" ;
                U:units = "m/s" ;
        float V(time, lat, lon) ;
                V:_FillValue = -999.f ;
                V:long_name = "Meridional Wind" ;
                V:short_name = "V" ;
                V:units = "m/s" ;

// global attributes:
                :title = "UV300: January and July" ;
                :source = "Climate Analysis Section, NCAR" ;
                :history = "Dataset uv300.hs from EZPLOT demo dataset" ;
                :Conventions = "None" ;
                :creation_date = "Mon Mar 29 09:24:57 MST 1999" ;
                :references = "\n",
                        "EZPLOT for Publication Quality Plots\n",
                        "Christian Guillemot\n",
                        "NCAR-TN 414   1995\n",
                        "http://www.cgd.ucar.edu/cas/ezplot/" ;

On Thu, Dec 8, 2016 at 8:59 PM, Muhammad Omer Mughal <m.mughal1 at postgrad.curtin.edu.au<mailto:m.mughal1 at postgrad.curtin.edu.au>> wrote:

Hi


This example pulls the global attributes off a file and prints out their values:

  f = addfile("$NCARG_ROOT/lib/ncarg/data/cdf/uv300.nc<http://uv300.nc>","r")

  file_atts = getvaratts(f)

  print(file_atts)

  if(.not.any(ismissing(file_atts))) then
    do i=0,dimsizes(file_atts)-1
      print("Attribute " + file_atts(i) + " = " + f@$file_atts(i)$)
   end do
  end if


How can one pull out a specific attribute from the file f  and use it ?



Muhammad Omer Mughal
MSc BSc Mechanical Engineering
PhD  Research Scholar
Remote Sensing and Satellite Research Group
Department of Imaging and Applied Physics
Curtin University

Curtin University
Tel | +61 8 9266 7962
Fax | +61 8 9266 2377
Mobile | 0470 237 525

Email | m.mughal1 at postgrad.curtin.edu.au<mailto:m.lynch at curtin.edu.au>
Web | http://curtin.edu.au<http://curtin.edu.au/>

Curtin University is a trademark of Curtin University of Technology.
CRICOS Provider Code 00301J (WA), 02637B (NSW)



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