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Harris Geospatial / Docs Center / IDL Reference / I/O - HDF / HDF_VD_FDEFINE

HDF_VD_FDEFINE

HDF_VD_FDEFINE

The HDF_VD_FDEFINE procedure adds a new field specification for a VData in an HDF file. HDF_VD_FDEFINE can only be used for a new VData.

Examples


HDF_VD_FDEFINE, vid, 'VEL', /DOUBLE, ORDER=3

Syntax


HDF_VD_FDEFINE, VData, Fieldname [, /BYTE | , /DOUBLE | , /FLOAT | , /INT | , /LONG] [, ORDER=value] [, /UINT] [, /ULONG]

Arguments


VData

The VData handle returned by a previous call to HDF_VD_ATTACH.

Fieldname

A string containing the new field name.

Keywords


BYTE

Set this keyword to indicate that the field will contain 8-bit unsigned integer data.

DOUBLE

Set this keyword to indicate that the field will contain 64-bit floating point data.

FLOAT

Set this keyword to indicate that the field will contain 32-bit floating point data.

INT

Set this keyword to indicate that the field will contain 16-bit integer data.

LONG

Set this keyword to indicate that the field will contain 32-bit integer data.

ORDER

This keyword specifies the number of distinct components in the new field. Compound variables have an order greater than 1. The default order is 1.

UINT

Set this keyword to indicate that the field will contain 16-bit unsigned integer data.

ULONG

Set this keyword to indicate that the field will contain 32-bit unsigned integer data.

Version History


4.0

Introduced



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