H5Scombine_select {rhdf5} | R Documentation |
Combine two selections
H5Scombine_select(h5space1, op = h5default("H5S_SELECT"), h5space2)
h5space1, h5space2 |
H5IdComponent objects representing a dataspaces. |
op |
Character string defined the operation used to join the two
dataspaces. See |
Returns an H5IdComponent object representing a new dataspace.
The new dataspace will have the same extent as h5space1
with the
hyperslab selection being the result of combining the selections of
h5space1
and h5space2
.
## create two 1 dimensional dataspaces ## of different sizes sid_1 <- H5Screate_simple(dims = 20) sid_2 <- H5Screate_simple(dims = 10) ## select a single block of 5 points in sid_1 ## this is equivalent to [11:16] in R syntax H5Sselect_hyperslab(sid_1, start = 11, stride = 1, block = 5, count = 1) ## select 2 blocks of 1 point from sid_2 ## equivalent to [c(3,5)] in R syntax H5Sselect_hyperslab(sid_2, start = 3, stride = 2, block = 1, count = 2) ## confirm we have select 5 and 2 points resepectively H5Sget_select_npoints(sid_1) H5Sget_select_npoints(sid_2) ## combine the two dataset selections keeping points that ## are in one or both of the selections sid_3 <- H5Scombine_select(sid_1, "H5S_SELECT_OR", sid_2) ## extent of the new dataset is the same as sid_1 sid_3 ## confirm the selection contains 7 points H5Sget_select_npoints(sid_3) ## tidy up H5Sclose(sid_1) H5Sclose(sid_2) H5Sclose(sid_3)