---
name: "PDL::Modules"
section: "3pm"
platform: "linux"
package: "pdl"
version: "1:2.100-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/PDL::Modules/3pm"
---

# PDL::Modules(3pm)

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.

## FOUNDATION

- perldl

  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::Func

  Interpolation-related functions.

## 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).

## COORDINATE TRANSFORMATIONS

- PDL::Transform

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

- PDL::Transform::Cartography

  Cartographic projections.

## 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::Misc

  Misc IO routines.

- PDL::IO::Storable

  Support for Perl's Storable module.

### Image Formats

- PDL::IO::FITS

  PDL support for FITS images.

- PDL::IO::Pnm

  PDL support for PNM images.

## 2D MATRICES

- PDL::Matrix

  Convenience class for 2D matrix work.

- PDL::MatrixOps

  Additional matrix operators.

## ADVANCED

- PDL::Dbg

  PDL debugger.

- PDL::DiskCache

  Manage many ndarrays through a disk cache.

- PDL::Objects

  If you want to sub-class from PDL.

## 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/