HDF_SD_FILEINFO

The HDF_SD_FILEINFO procedure retrieves the number of datasets and global attributes in an HDF file.

Syntax

HDF_SD_FILEINFO, SDinterface_id, Datasets, Attributes

Arguments

SDinterface_id

An SD interface ID as returned by HDF_SD_START.

Datasets

A named variable in which the total number of SD-type objects (i.e., the number of datasets + the number of dimensions) in the file is returned.

Attributes

A named variable in which the number of global attributes in the file is returned.

Keywords

None

Examples

; Start the SD interface: 
SDinterface_id = HDF_SD_START('demo.hdf', /CREATE) 
; Set a global attribute: 
HDF_SD_ATTRSET,SDinterface_id, 'TITLE', 'MYTITLE' 
; Set another one: 
HDF_SD_ATTRSET,SDinterface_id, 'TITLE2', 'MYTITLE2' 
; Create a dataset: 
SDdataset_id = HDF_SD_CREATE(SDinterface_id, 'var1', [10,3]) 
; Retrieve info about the dataset: 
HDF_SD_FILEINFO, SDinterface_id, datasets, attributes 
; Print information about the returned variables: 
HELP, datasets, attributes 
; End SD access: 
HDF_SD_ENDACCESS, SDdataset_id 
; Close the SD interface: 
HDF_SD_END, SDinterface_id

IDL Output

DATASETS LONG = 1 
ATTRIBUTES LONG = 2

Version History


4.0	Introduced