HDF(3) User Contributed Perl Documentation HDF(3)NAMEPDL::IO::HDF - A PDL interface to the HDF4 library.
SYNOPSIS
use PDL;
use PDL::IO::HDF;
# Open file 'foo.hdf' with all hdf interface:
my $HDF = PDL::IO::HDF->new("foo.hdf");
# You can call functions from either the SD or VS interfaces:
$HDF->{SD}->SDget("Foo_data");
$HDF->{VS}->VSgetnames();
# To close the file:
$HDF->close();
DESCRIPTION
This library provides functions to manipulate HDF files with the SD,
VS, and V HDF interfaces.
For more infomation on HDF, see http://hdf.ncsa.uiuc.edu/
The 'new' function of this package uses the 'new' functions for the
individual HDF interfaces. This allows you to use all of the interfaces
at one time (if you don't mind the extended syntax).
Actually using the HDF files comes down to using one of the particular
interfaces, for that see the docs on those modules.
CONSTANTS
These constants are now implented using the perl 'use constant' pragma.
Previously, they were just scalars that were changable (which is a no-
no).
See constant(1) for more info on how to use these in your code.
Access Modes
DFACC_READ
Open the file in read-only mode.
DFACC_WRITE
Open the file in write-only mode.
DFACC_CREATE
Clobber the file (create it if it doesn't exist, and then open
with RW mode).
DFACC_ALL
Open the file in read-write mode.
DFACC_RDONLY
Same as DFACC_READ
DFACC_RDWR
Open the file in read-write mode.
VS Interface Interlacing Modes
FULL_INTERLACE
NO_INTERLACE
HDF4 Data Type Codes:
DFNT_UCHAR
HDF's unsigned char ~= PDL's byte
DFNT_CHAR
HDF's char ~= PDL's byte
DFNT_FLOAT32
HDF's 32-bit float ~= PDL's float
DFNT_FLOAT64
HDF's 64-bit float ~= PDL's double
DFNT_INT8
HDF's 8-bit integer ~= PDL's byte
DFNT_UINT8
HDF's 8-bit unsigned integer ~= PDL's byte
DFNT_INT16
HDF's 16-bit integer ~= PDL's short
DFNT_UINT16
HDF's 16-bit unsigned integer ~= PDL's ushort
DFNT_INT32
HDF's 32-bit integer ~= PDL's long
DFNT_INT64
HDF's 32-bit integer ~= PDL's long
Misc. HDF Library Constants:
MAX_NC_NAME
This is the max name length for SDS variables, attribtues, and
just about anything else.
MAX_VAR_DIMS
This is the max number of dims a HDF variable can have.
VNAMELENMAX
Max length of V interface names.
CURRENT AUTHOR & MAINTAINER
Judd Taylor, Orbital Systems, Ltd. judd dot t at orbitalsystems dot
com
PREVIOUS AUTHORS
Patrick Leilde patrick.leilde@ifremer.fr contribs of Olivier Archer
olivier.archer@ifremer.fr
SEE ALSOperl(1), PDL(1), PDL::IO::HDF::SD(1), PDL::IO::HDF::VS(1), constant(1).
perl v5.14.1 2011-03-30 HDF(3)
