H5O: HDF5 Object Interface

In rhdf5: R Interface to HDF5

Description

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).

Usage

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

Arguments

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.

Details

Interface to the HDF5 C-library libhdf5. See https://portal.hdfgroup.org/display/HDF5/Objects for further details.

Value

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.

Author(s)

Bernd Fischer

References

https://portal.hdfgroup.org/display/HDF5

See Also

rhdf5

Examples

# 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)

rhdf5 documentation built on Nov. 8, 2020, 6:56 p.m.