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.
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