HDF_SD_IDTOREF
Syntax | Return Value | Arguments | Keywords | Examples | Version History | See Also
The HDF_SD_IDTOREF function converts a SD data set ID into a SD data set reference number. The reference number can be used to add the SD data set to a Vgroup through the HDF_VG interface. The tag number for an SD is 720.
Syntax
Result = HDF_SD_IDTOREF(SDdataset_id)
Return Value
Returns the SD data set reference number.
Arguments
SDdataset_id
A SDdataset_id as returned from HDF_SD_CREATE or HDF_SD_SELECT.
Keywords
None
Examples
; Create an SD data set and get the Reference number: file_id = HDF_OPEN('demo.hdf', /ALL) SDinterface_id = HDF_SD_START('demo.hdf', /RDWR) dim=[100] SDdataset_id = HDF_SD_CREATE(SDinterface_id, 'demo_data', dim, /FLOAT) ref = HDF_SD_IDTOREF(SDdataset_id) HDF_SD_ADDDATA, SDdataset_id, FINDGEN(100)/10.45 + 2.98 HDF_SD_ENDACCESS, SDdataset_id HDF_SD_END, SDinterface_id ; Use the Reference number to add the SD to a Vgroup: SD_TAG = 720 vgID = HDF_VG_GETID(file_id,-1) vg_handle = HDF_VG_ATTACH(file_id, vgID, /WRITE) HDF_VG_SETINFO, vg_handle, name='data1', class='demo' HDF_VG_ADDTR, vg_handle, SD_TAG, ref ; Use HDF_VG_INQTR to verify the SD was added correctly: IF HDF_VG_INQTR(vg_handle, SD_TAG, ref) THEN $ PRINT, 'SUCCESS' ELSE PRINT, 'Failure' HDF_VG_DETACH, vg_handle HDF_CLOSE, file_id
IDL Output
Version History
See Also
HDF_SD_CREATE, HDF_SD_NAMETOINDEX, HDF_SD_REFTOINDEX, HDF_SD_SELECT, HDF_VG_ADDTR, HDF_VG_ATTACH, HDF_VG_DETACH, HDF_VG_GETID, HDF_VG_INQTR
