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Re: delete a dataset in a hdf file [message #34119]

Thu, 27 February 2003 00:04

Klemens Barfus
Messages: 45
Registered: December 2002

Member

Thanks James ! Because of your answer, I will not waste more time trying
to delete things I can not delete.

best regards

Klemens

James Kuyper wrote:

> Klemens Barfus wrote:
>
>> Hello together,
>> how can I delete a dataset in a hdf file ? I have not found anything
>> about it except a command like HDF_DELDD. Is it the right way and how do
>> I have to use it ?
>>
>
> That only removes tags and descriptors. HDF isn't really designed for
> deleting things; its design reflects a "write once, read many" attitude.
> The there are a few things that you can delete. You can use HDF_DELDD,
> and since HDF is built upon CDF, you can use NCDF_ATTDEL to delete
> attributes. However, they aren't really removed from the file;
> internally, they're marked as "no longer active", but they still use up
> space.
>
> You can emulate deletions of a dataset, by copying every part of a file,
> except the part you want deleted, to a new file. Then erase the old one,
> and change the name of the new file to match the old one. Sorry, that's
> about the best you can do.
>

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[Message index]

		Re: delete a dataset in a hdf file By: Klemens Barfus on Thu, 27 February 2003 00:04
		Re: delete a dataset in a hdf file By: James Kuyper on Wed, 26 February 2003 11:21
		Re: delete a dataset in a hdf file By: Klemens Barfus on Wed, 26 February 2003 11:04

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