rhdf5 (version 2.16.0)

HDF5 Object Interface: HDF5 Object Interface

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.

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.

Details

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

References

http://www.hdfgroup.org/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)