H5R: H5R - References to objects and regions

In grimbough/rhdf5: R Interface to HDF5

H5R - References to objects and regions

Description

The H5R functions can be used for creating or working with references to specific objects and data regions in an HDF5 file.

Author(s)

Mike Smith

Examples

library(rhdf5)

## first we'll create a file with a group named "foo" and a
## 1-dimensional dataset named "baa" inside that group.
file_name <- tempfile(fileext = ".h5")
h5createFile(file_name)
h5createGroup(file = file_name, group = "/foo")
h5write(1:100, file=file_name, name="/foo/baa")


fid <- H5Fopen(file_name)
ref_to_group <- H5Rcreate(fid, name = "/foo")
ref_to_dataset <- H5Rcreate(fid, name = "/foo/baa")
two_refs <- c(ref_to_group, ref_to_dataset)
two_refs

## the size of this dataspace is the number of object references
## we want to store
sid <- H5Screate_simple(2)
tid <- H5Tcopy(dtype_id = "H5T_STD_REF_OBJ")
did <- H5Dcreate(fid, name = "object_refs", dtype_id = tid, h5space = sid)
H5Dwrite(did, two_refs)
H5Dclose(did)
H5Sclose(sid)
H5Fclose(fid)

grimbough/rhdf5 documentation built on Sept. 14, 2024, 8:41 a.m.