HDF_VD_GETINFO

The HDF_VD_GETINFO procedure is a general VData inquiry routine. Set the various keywords to named variables to return information about each field of a VData in a Hierarchical Data Format file.

Calling Sequence

HDF_VD_GETINFO, VData, Index

Arguments

VData

The VData handle returned by a previous call to HDF_VD_ATTACH.

Index

A zero-based index specifying which field or the name of the field within the VData to inquire about. For example:

HDF_VD_GETINFO, Vdat, 'VEL', ORDER=order

Keywords

NAME

Set this keyword to a named variable in which the name of the field is returned as a string.

ORDER

Set this keyword to a named variable in which the order of the field is returned.

SIZE

Set this keyword to a named variable in which the size of a data value for the specified field in the VData is returned.

TYPE

Set this keyword to a named variable in which the type of the field is returned. One of the following strings is returned: 'BYTE' , 'INT' , 'LONG' , 'FLOAT' , 'DOUBLE' .

Example

HDF_VD_GET, Vdat, NFIELDS=n

FOR index=0,n-1 DO BEGIN

  HDF_VD_GETINFO, Vdat, index, NAME=n, TYPE=t, ORDER=o

  PRINT, index, ':', n, 'TYPE=', t, 'ORDER=', o

ENDFOR