---
name: "PDL::Modules"
section: "1p"
platform: "linux"
package: "pdl"
version: "1:2.081-2"
release: "Debian 12 (Bookworm)"
platforms: ["linux"]
url: "https://new.carta.tech/PDL::Modules"
---

# PDL::Modules(1p)

A guide to PDL's module reference.

## NAME

PDL::Modules - A guide to PDL's module reference.

## DESCRIPTION

This page serves as a table of contents for PDL's module documentation. This page does not list every single PDL module. It only shows the ones intended for PDL users, while omitting those which are deemed "for internal use only". If you wish to see a comprehensive list of all documentation, please see the PDL::Index page.

## LOOKING FOR A FUNCTION?

If you want to search for a function name, you should use the PDL shell along with the "help" or "apropos" command (to do a fuzzy search). For example:

```
 pdl> apropos xval
 xlinvals        X axis values between endpoints (see xvals).
 xlogvals        X axis values logarithmicly spaced...
 xvals           Fills an ndarray with X index values...
 yvals           Fills an ndarray with Y index values. See the CAVEAT for xvals.
 zvals           Fills an ndarray with Z index values. See the CAVEAT for xvals.
```

To learn more about the PDL shell, see perldl or pdl2.

## FOUNDATION

- perldl or pdl2

  Learn about the PDL shell.

### Functions

- PDL::Core

  Core module (e.g. creating ndarrays).

- PDL::Basic

  Simplified interface to the more general PDL::Primitive.

- PDL::Ops

  Basic operators (e.g. arithmetic, comparisons, etc.).

- PDL::Ufunc

  Functions that accumulate along a dimension (e.g. sum, max).

### Other Features

- PDL::AutoLoader

  MATLAB-style function autoloader.

- PDL::Slices

  Indexing and slices. How to access a subset of an ndarray.

- PDL::NiceSlice

  Nicer syntax for slices.

## MISCELLANEOUS

- PDL::Primitive

  Fundamental operations on ndarrays.

- PDL::Bad

  Bad value support.

- PDL::Reduce

  A 'reduce' function for PDL.

- PDL::Lite

  Minimum PDL module OO loader.

- PDL::LiteF

  Minimum PDL module function loader.

- PDL::Extended

  Extended Mathematical Operators.

- PDL::Func

  Interpolation-related functions.

## GRAPHICS

- PDL::Graphics::PGPLOT

  PGPLOT library.

- PDL::Graphics::PLplot

  PLplot library.

### 3D Graphics

- PDL::Graphics::TriD

  3D graphics core module.

- PDL::Graphics::TriD::Rout

  Helper routines for 3D graphics.

- PDL::Graphics::TriD::Contours

  3D surface contours.

### Helper Modules

- PDL::Graphics::LUT

  Look-up tables.

- PDL::Graphics::IIS

  Display images on IIS devices.

- PDL::Graphics::Limits

  Derive data limits for display purposes.

## IMAGE PROCESSING

- PDL::Compression

  Compression utilities.

- PDL::Image2D

  2-dimensional image processing.

- PDL::ImageND

  N-dimensional image processing.

- PDL::ImageRGB

  RGB image data handling.

## NUMERICAL METHODS

- PDL::FFT

  Fast Fourier Transform (native implementation).

- PDL::FFTW

  PDL interface to the FFTW library.

- PDL::Filter::LinPred

  Linear predictive filtering.

- PDL::Filter::Linear

  Linear filtering.

- PDL::Opt::Simplex

  Simplex optimization routines.

- PDL::Minuit

  PDL interface to the Minuit library.

- PDL::Slatec

  PDL interface to the Slatec library.

## COORDINATE TRANSFORMATIONS

- PDL::Transform

  Coordinate transforms, image warping, and N-D functions.

- PDL::Transform::Cartography

  Cartographic projections.

- PDL::Transform::Proj4

  PDL interface to the Proj4 projection library.

## IO FUNCTIONS

- PDL::IO

  Overview of IO functions.

- PDL::IO::Dumper

  Data dumper.

- PDL::IO::FastRaw

  Fast storage format (outdated).

- PDL::IO::FlexRaw

  Flexible storage format.

- PDL::IO::Rout

  Misc IO routines.

- PDL::IO::Sortable

  Support for Perl's 'Storable' module.

### Image Formats

- PDL::IO::FITS

  PDL support for FITS images.

- PDL::IO::PNM

  PDL support for PNM images.

- PDL::IO::GD

  PDL interface to the GD image library.

- PDL::IO::HDF

  PDL interface to the HDH4 image library.

- PDL::IO::NetPBM

  PDL interface to the NetPBM image library.

- PDL::IO::NDF

  PDL interface to the Starlink image library. Available as a separate CPAN download.

## 2D MATRICES

- PDL::Matrix

  Convenience class for 2D matrix work.

- PDL::MatrixOps

  Additional matrix operators.

## GNU SCIENTIFIC LIBRARY

- PDL::GSL::DIFF

  Numerical differentiation.

- PDL::GSL::INTEG

  Numerical integration.

- PDL::GSL::INTERP

  Interpolation.

- PDL::GSL::MROOT

  Multidimensional root-finding.

- PDL::GSL::RNG

  RNG and randist.

### Special Functions

- PDL::GSLSF::AIRY

  - PDL::GSLSF::BESSEL

  - PDL::GSLSF::CLAUSEN

  - PDL::GSLSF::COULOMB

  - PDL::GSLSF::COUPLING

  - PDL::GSLSF::DAWSON

  - PDL::GSLSF::DEBYE

  - PDL::GSLSF::DILOG

  - PDL::GSLSF::ELEMENTARY

  - PDL::GSLSF::ELLINT

  - PDL::GSLSF::ELLJAC

  - PDL::GSLSF::ERF

  - PDL::GSLSF::EXP

  - PDL::GSLSF::EXPINT

  - PDL::GSLSF::FERMI\_DIRAC

  - PDL::GSLSF::GAMMA

  - PDL::GSLSF::GEGENBAUER

  - PDL::GSLSF::HYPERG

  - PDL::GSLSF::LAGUERRE

  - PDL::GSLSF::LEGENDRE

  - PDL::GSLSF::LOG

  - PDL::GSLSF::POLY

  - PDL::GSLSF::POW\_INT

  - PDL::GSLSF::PSI

  - PDL::GSLSF::SYNCHROTRON

  - PDL::GSLSF::TRANSPORT

  - PDL::GSLSF::TRIG

  - PDL::GSLSF::ZETA

  ## FITTING FUNCTIONS

- PDL::Fit::Gaussian

  Fit gaussian curves.

- PDL::Fit::Polynomial

  Fit polynomials.

- PDL::Fit::Linfit

  Fit linear combinations of functions.

- PDL::Fit::LM

  Fit functions using the Levenberg-Marquardt algorithm.

## ADVANCED

- PDL::Dbg

  PDL debugger.

- PDL::DiskCache

  Manage many ndarrays through a disk cache.

- PDL::CallExt

  Call external functions.

- PDL::Objects

  If you want to sub-class from PDL (note: incomplete).

## COPYRIGHT

Copyright 2010 Daniel Carrera (dcarrera@gmail.com). You can distribute and/or modify this document under the same terms as the current Perl license.

See: http://dev.perl.org/licenses/