H5O: HDF5 Object Interface
In patperry/rhdf5: HDF5 interface to R

Description Usage Arguments Details Value Author(s) References See Also Examples

The Object interface, H5O, functions manipulate objects in an HDF5 file. This interface is designed to be used in conjunction with the Links interface (H5L).

H5Oopen  (h5loc, name)
H5Oclose (h5obj)
H5Oget_num_attrs(h5obj)
H5Oget_num_attrs_by_name(h5loc, name)

`h5obj`	An object of class `H5IdComponent` representing a H5 object identifier (file, group, or dataset). See `H5Fcreate`, `H5Fopen`, `H5Gcreate`, `H5Gopen`, `H5Dcreate`, or `H5Dopen` to create an object of this kind.
`h5loc`	An object of class `H5IdComponent` representing a H5 location identifier (file or group). See `H5Fcreate`, `H5Fopen`, `H5Gcreate`, `H5Gopen` to create an object of this kind.
`name`	The name of the link to be checked.

Interface to the HDF5 C-library libhdf5. See http://www.hdfgroup.org/HDF5/doc/RM/RM_H5O.html for further details.

H5Oopen opens an object (a file, group, or dataset) and returns an object of class H5IdComponent. H5Oclose closed the object again. H5Oget_num_attrs and H5Oget_num_attrs_by_name return the number of attributes of an object.

Bernd Fischer

http://www.hdfgroup.org/HDF5

rhdf5

# create an hdf5 file and write something
h5createFile("ex_H5O.h5")
h5createGroup("ex_H5O.h5","foo")
B = array(seq(0.1,2.0,by=0.1),dim=c(5,2,2))
h5write(B, "ex_H5O.h5","foo/B")

# reopen file and dataset and get object info
fid <- H5Fopen("ex_H5O.h5")
oid = H5Oopen(fid, "foo")
H5Oget_num_attrs(oid)
H5Oclose(oid)
H5Fclose(fid)