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Re: How to check for existence of an HDF5 group [message #90185 is a reply to message #90182]

Sun, 08 February 2015 01:39

markb77
Messages: 217
Registered: July 2006

Senior Member

On Saturday, February 7, 2015 at 7:24:50 PM UTC+1, David Grier wrote:
> Dear Folks,
>
> I want to create new groups within an HDF5 file. Before creating a new group, however,
> I'd like to check whether a group of the same name already exists. What's the right
> way to do this?
>
> Calling H5G_OPEN or H5G_GET_OBJINFO with a new group name throws an error.
> I could write a wrapper routine that catches the error and returns a "group not found"
> value but that seems kludgy.
>
> H5_LIST returns a whole lot of information, which I suppose I could parse. That also seems
> clunky.
>
> Is there a more elegant solution? Something along the lines of FILE_TEST that works
> for HDF5 groups (H5G_TEST, e.g.)?
>
> All the best,
>
> David

hi David,

The way to do it is to use H5_LIST with the FILTER keyword.

Also, I have a routine for this in my library: wmb_h5_group_exists()

which can be found at http://www.github.com/superchromix/wmb_lib

best,
Mark

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[Message index]

		How to check for existence of an HDF5 group By: dg86 on Sat, 07 February 2015 10:24
		Re: How to check for existence of an HDF5 group By: markb77 on Sun, 08 February 2015 01:39
		Re: How to check for existence of an HDF5 group By: dg86 on Sun, 08 February 2015 17:24
		Re: How to check for existence of an HDF5 group By: ferdonbbp on Tue, 30 May 2017 02:44

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