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Re: NetCDF4 problem [message #93007 is a reply to message #93003]

Fri, 08 April 2016 08:22

Michael Galloy
Messages: 1114
Registered: April 2006

Senior Member

On 4/8/16 6:37 AM, deathknight wrote:
> 在 2016年4月8日星期五 UTC+8上午1:03:28，Mike Galloy写道：
>> On 4/7/16 8:36 am, Paul van Delst wrote:
>>> On 04/07/16 09:52, deathknight wrote:
>>>> Hi,
>>>>
>>>> I'm using IDL 7.1. How can I read the NetCDF4 files using this version
>>>> of IDL?
>>>
>>> NetCDF4 support wasn't added until v8.0 so the best (only?) way is to
>>> upgrade your IDL install.
>>
>> I think that is correct.
>>
>>> Similarly, HDF5 support wasn't added until v8.3 (?) so that route is a
>>> no go.
>>
>> HDF5 support has been in IDL since 5.6:
>>
>> http://harrisgeospatial.com/docs/H5_OPEN.html
>>
>> I would read the NetCDF 4 file using the HDF 5 routines. If you want
>> simpler routines than the low level interface, check out my HDF 5 routines:
>>
>> https://github.com/mgalloy/mglib/tree/master/src/hdf5
>>
>> The routine to use is MG_H5_GETDATA. You will need the files in that
>> directory (plus at least objects/idl_object__define.pro to run on IDL 7.1).
>>
>
> Could you please show me more about how to use these routines on IDL 7.1?
> I added all the .pro files from your website into the /lib and run:
> IDL> result=mg_h5_getdata('E:\netcdf4.nc')
> and I got the error: MG_H5_GETDATA: no variable requested
>
> Thank you very much!
>

Yes, you have to specify the variable/attribute that you want:

IDL> var = mg_h5_getdata('E:\netcdf4.nc', 'group/myvar')
IDL> attr = mg_h5_getdata('E:\netcdf4.nc', 'group/myvar.attr')

Mike
--
Michael Galloy
www.michaelgalloy.com
Modern IDL: A Guide to IDL Programming (http://modernidl.idldev.com)

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[Message index]

		NetCDF4 problem By: DK on Thu, 07 April 2016 06:52
		Re: NetCDF4 problem By: Paul Van Delst[1] on Thu, 07 April 2016 07:36
		Re: NetCDF4 problem By: Michael Galloy on Thu, 07 April 2016 10:03
		Re: NetCDF4 problem By: Paul Van Delst[1] on Thu, 07 April 2016 10:45
		Re: NetCDF4 problem By: Michael Galloy on Fri, 08 April 2016 08:24
		Re: NetCDF4 problem By: DK on Fri, 08 April 2016 05:37
		Re: NetCDF4 problem By: Michael Galloy on Fri, 08 April 2016 08:22
		Re: NetCDF4 problem By: DK on Sun, 10 April 2016 05:50
		Re: NetCDF4 problem By: Michael Galloy on Mon, 11 April 2016 16:06
		Re: NetCDF4 problem By: DK on Tue, 26 April 2016 20:00
		Re: NetCDF4 problem By: Michael Galloy on Thu, 28 April 2016 13:41
		Re: NetCDF4 problem By: DK on Thu, 28 April 2016 23:40
		Re: NetCDF4 problem By: Haje Korth on Fri, 29 April 2016 04:27
		Re: NetCDF4 problem By: DK on Sun, 01 May 2016 07:23
		Re: NetCDF4 problem By: DK on Fri, 08 April 2016 05:32

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