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Re: Modify netcdf attributes [message #93521 is a reply to message #93519]

Wed, 10 August 2016 09:31

khyde
Messages: 21
Registered: November 2013

Junior Member

On Wednesday, August 10, 2016 at 11:37:56 AM UTC-4, joe....@noaa.gov wrote:
> On Thursday, August 4, 2016 at 2:49:08 PM UTC-4, KH wrote:
>> Is it possible to change an existing global attribute in a netcdf file? I have figured out a couple different ways to add a new global attribute, but I would also like to modify the information stored in an existing attribute.
>
> You need to be in "define" mode if the attribute is a different size from the existing one (e.g., a string). Try `ncdf_control, ncid, /redef` first to see if that fixes things.

Thank you for your suggestion. I tried the following:

1) id = ncdf_open(file,/write)
2) ncdf_control, id, /redef
3) ncdf_attput, id, 'title', 'new_title',/global
4) ncdf_control,id,/endef
5) ncdf_close, id

The program crashes the entire IDL session at step 4. I tried skipping this step as well, and then it crashes the system at ncdf_close. This happens in both on both the Mac and Linux OS.

Any thoughts on what I am doing wrong or is this something I just won't be able to do without first deleting the original attribute?

Thanks,
-K

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[Message index]

		Modify netcdf attributes By: khyde on Thu, 04 August 2016 11:49
		Re: Modify netcdf attributes By: joe.sapp on Wed, 10 August 2016 08:37
		Re: Modify netcdf attributes By: khyde on Wed, 10 August 2016 09:31
		Re: Modify netcdf attributes By: khyde on Thu, 11 August 2016 07:14

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