### PDL Tutorials and Examples

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Mac-OS-X

Documentation and resources for learning PDL, including tutorials and quick start guides. These are valuable for new and intermediate users.

```perl
use PDL::Tutorials;
```

--------------------------------

### Install PDL Perl Modules using CPAN Shell

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Ubuntu-7.10-Gutsy-Gibbon

This section demonstrates how to enter the CPAN shell and install the necessary Perl modules, ExtUtils::F77 and PGPLOT, which are required for PDL's plotting capabilities. It guides through manual configuration prompts.

```bash
sudo perl -MCPAN -e shell
# Type 'no' when asked about manual configuration
install ExtUtils::F77
install PGPLOT
# Press ENTER for default plot tests
exit
```

--------------------------------

### Install PDL and PGPLOT Dependencies via Synaptic

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Ubuntu-7.10-Gutsy-Gibbon

This describes the steps to search for and mark PDL, pgplot5, libterm-readline-gnu-perl, g77, libc6-dev, libx11-dev, and netpbm for installation using the Synaptic Package Manager. It also mentions installing suggested packages.

```bash
# Search for pdl
# Mark for installation

# Search for pgplot5
# Mark for installation

# Search for libterm-readline-gnu-perl, g77, libc6-dev, libx11-dev, netpbm
# Mark for installation along with suggested packages

# Click Apply to install all marked packages
```

--------------------------------

### Using the PDL Interactive Shell (perldl)

Source: https://context7.com/pdlporters/pdl/llms.txt

Provides instructions and examples for using the `perldl` interactive shell. It covers starting the shell, getting help on functions, exploring data with commands like `p` and `info`, running demos, and basic shell features like history and multiline input.

```shell
# Start the shell from command line:
# $ perldl
# or
# $ pdl
```

```perl
# Inside perldl:

# Get help on functions
pdl> help sum
pdl> apropos matrix           # Search for functions containing 'matrix'
pdl> help                     # General help

# Quick data exploration
pdl> $x = sequence(10)
pdl> p $x                     # Print shortcut
 [0 1 2 3 4 5 6 7 8 9]

pdl> p $x->info               # Array information
 PDL: Double D [10]

pdl> p $x->stats              # Statistical summary
 # Mean, Prms, Median, Min, Max, Adev, Rms

# Run demos
pdl> demo                     # List available demos
pdl> demo 3d                  # Run 3D graphics demo

# History and editing
pdl> # Use up/down arrows for command history
pdl> # Use standard readline editing

# Configuration in ~/.perldlrc
# Add custom startup commands, aliases, etc.

# Multiline input
pdl> for $i (1..5) {
    print $i, "\n";
}

# Quick plotting (if PDL::Graphics::* available)
pdl> use PDL::Graphics::Simple
pdl> $w = pgswin()
pdl> $w->plot(sin(sequence(100)/10))

# Exit
pdl> quit
# or Ctrl-D
```

--------------------------------

### Launch PDL Environment

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-a-Linux-Debian-based-operating-system-for-power-users

Starts the interactive Perl Data Language shell and accesses the built-in demonstration suite.

```bash
perldl
# Inside the perldl prompt:
demo
```

--------------------------------

### Add Debian Repository to Synaptic

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Ubuntu-7.10-Gutsy-Gibbon

This snippet shows the APT line to add the Debian stable repository for installing PDL and its dependencies via Synaptic Package Manager. Ensure your system has internet access before proceeding.

```text
deb http://ftp.debian.org stable main contrib non-free
```

--------------------------------

### Starting the PDL Shell and Basic Variable Declaration

Source: https://github.com/pdlporters/pdl/wiki/Documentation/PDL-for-IDL-users

Demonstrates how to start the PDL shell and declare variables, comparing the syntax with IDL. PDL uses the 'perldl' command and the 'pdl' constructor, while IDL uses its own shell and syntax.

```idl
; IDL
IDL> A = [1,2,3,4]
IDL> print, A
```

```perl
# PDL
perldl> $A = pdl [1,2,3,4]
perldl> print $A
```

--------------------------------

### Launch PDL Interactive Shell

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Gentoo

Starts the PDL interactive shell, providing a prompt for executing PDL commands and accessing its functionalities. This command should be run as a regular user, not as root.

```bash
perldl
```

--------------------------------

### Compile and Install Pixman and Cairo Graphics Libraries

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Mac-OS-X

Instructions for compiling and installing Pixman and Cairo, which are prerequisites for certain Cairo graphics functionalities. This involves downloading the source code, configuring the build, compiling, and installing the libraries.

```bash
./configure
make
sudo make install
```

--------------------------------

### Usage of PDL::IO::Pic

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Mac-OS-X

Example commands to load the image I/O module and write a piddle to a TIFF file within the PDL shell.

```perl
use PDL::IO::Pic;
$a = ones(5,4)->random;
wpic $a, 'foo.tif';
```

--------------------------------

### Install Karma Libraries via Shell

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Mac-OS-X

Commands to download and install the Karma software suite using rsync and the provided installation script.

```bash
$ rsync -a rsync.science-software.net::karma/common/ /usr/local/karma
$ /usr/local/karma/csh_script/install-karma
```

--------------------------------

### Build and Install NetPBM

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Mac-OS-X

Commands to checkout, configure, and install the NetPBM library required for PDL::IO::Pic functionality.

```shell
svn checkout http://netpbm.svn.sourceforge.net/svnroot/netpbm/advanced netpbm
cd netpbm
./configure
make
make package pkgdir=foo
sudo ./installnetpbm
```

--------------------------------

### Configure Cairo Graphics Build Options

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Mac-OS-X

Example output from Cairo's configure script, detailing the enabled and disabled surface backends, font backends, and internal features. This helps in understanding the capabilities of the compiled Cairo library and potential build issues.

```text
cairo (version 1.8.10 [release]) will be compiled with:

The following surface backends:
  Image:         yes (always builtin)
  Xlib:          yes
  Xlib Xrender:  yes
  Quartz:        yes
  Quartz-image:  no (disabled, use --enable-quartz-image to enable)
  XCB:           no (disabled, use --enable-xcb to enable)
  Win32:         no (requires a Win32 platform)
  OS2:           no (disabled, use --enable-os2 to enable)
  PostScript:    yes
  PDF:           yes
  SVG:           yes
  glitz:         no (disabled, use --enable-glitz to enable)
  BeOS:          no (disabled, use --enable-beos to enable)
  DirectFB:      no (disabled, use --enable-directfb to enable)

The following font backends:
  User:          yes (always builtin)
  FreeType:      yes
  Win32:         no (requires a Win32 platform)
  Quartz:        yes

The following functions:
  PNG functions: yes

And the following internal features:
  gcov support:  no
  test surfaces: no (disabled, use --enable-test-surfaces to enable)
  ps testing:    yes
  pdf testing:   no (requires poppler-glib >= 0.9.2)
  svg testing:   no (requires librsvg-2.0 >= 2.15.0)
```

--------------------------------

### Configure PDL Build Settings

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Mac-OS-X

Examples of key-value pairs within the %PDLCONFIG hash used to control build features like HTML documentation, bad value handling, and 3D graphics support.

```perl
HTML_DOCS => 1,
TEMPDIR => undef,
HIDE_TRYLINK => 1,
OPTIMIZE => undef,
WITH_POSIX_THREADS => undef,
MALLOCDBG => undef,
WITH_BADVAL => 1,
BADVAL_USENAN => 0,
BADVAL_PER_PDL => 0,
WITH_3D => 1,
USE_POGL => undef,
POGL_VERSION => 0.62,
POGL_WINDOW_TYPE => 'glut'
```

--------------------------------

### Verify PDL::Sumprod installation with Perl

Source: https://github.com/pdlporters/pdl/wiki/Example/How-to-call-C-and-FORTRAN-functions-from-PDL

A test script to verify that the PDL::Sumprod module is correctly installed and accessible. It initializes PDL objects and executes the suma, producto, and prodexp functions to print results.

```perl
#!/usr/bin/env perl

use PDL;
use PDL::Sumprod;

$a=pdl([1,2,3,4]);
$b=pdl([5,6,7,8]);

$c=suma($a,$b); 
print $c,"\n";
print "ok 1\n";

$c=producto($a,$b);
print $c,"\n";
print "ok 2\n";

$c=prodexp($a,$b);
print $c,"\n";
print "ok 3\n";
```

--------------------------------

### Perl References: Creating and Dereferencing

Source: https://github.com/pdlporters/pdl/wiki/Documentation/PDL-for-IDL-users

Shows examples of creating references to scalars and arrays in Perl using the backslash operator and how to dereference them to access the original data.

```perl
$aref = $a
$A = $$aref
$A = ${$aref}
bref = @b
@B = @$bref
$B = ${$bref}[2]
$B = $bref->[2]
```

--------------------------------

### Build and Install Perl from Source

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Mac-OS-X

Standard Unix-style build process for installing Perl from source code. This ensures a clean, custom version of Perl is used instead of the system default.

```bash
./configure
make
make test
sudo make install
```

--------------------------------

### Install App::cpanminus

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-Using-cpanm

Installs the cpanm script, a lightweight tool for fetching, building, and installing Perl modules from CPAN.

```bash
curl -L http://cpanmin.us | perl - --sudo App::cpanminus
```

--------------------------------

### Build and Install PDL

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Mac-OS-X

Standard sequence of commands to configure, build, test, and install the Perl Data Language from source.

```shell
perl Makefile.PL
make
make test
sudo make install
```

--------------------------------

### Install PDL-Graphics-PLplot via PPM

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Windows

Installs the alternative PDL-Graphics-PLplot package which includes shared library support for PNG output. Requires the --force flag to ensure correct installation from the sisyphusion repository.

```shell
ppm install http://www.sisyphusion.tk/ppm_alt/PDL-Graphics-PLplot_alt.ppd --force
```

--------------------------------

### Install cpanminus from Source

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Mac-OS-X

Clones the cpanminus repository and installs it using the standard Perl Makefile workflow. cpanminus is recommended for easier management of Perl modules.

```bash
git clone git://github.com/miyagawa/cpanminus.git
cd cpanminus
perl Makefile.PL
make install
```

--------------------------------

### Configure PGPLOT Drivers

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Cygwin

Commands to extract the PGPLOT archive, initialize the installation directory, and filter the active drivers from the drivers.list configuration file.

```bash
tar xzf pgplot5.2.tar.gz
cd ~/pgplot
mkdir /usr/local/pgplot
cp drivers.list /usr/local/pgplot/
cd /usr/local/pgplot
grep -v '^!' drivers.list
```

--------------------------------

### Install PDL-Fit-Levmar via PPM

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Windows

Installs the PDL-Fit-Levmar package. Note that this package is only compatible with Perl builds where 'perl -V:ivsize' returns 4.

```shell
ppm install http://www.sisyphusion.tk/ppm/PDL-Fit-Levmar.ppd --force
```

--------------------------------

### Standard Unix Source Compilation Pattern

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Mac-OS-X

The standard sequence of commands used to compile and install software dependencies from source code on Unix-like systems.

```bash
$ ./configure
$ make
$ sudo make install
```

--------------------------------

### Install Perl Modules with cpanminus

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Mac-OS-X

Command-line usage for installing Perl modules using cpanminus. This is the preferred method for dependency management.

```bash
sudo cpanm Foo::Bar::Baz
```

--------------------------------

### Install PDL

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-Using-cpanm

Installs the PDL package from CPAN. Includes commands for both the latest stable release and specific developer releases via URL.

```bash
sudo cpanm -v PDL
sudo cpanm http://cpan.metacpan.org/authors/id/C/CH/CHM/PDL-2.4.9_016.tar.gz
```

--------------------------------

### PDL Testing and Transformations Documentation

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Mac-OS-X

Documentation for PDL's testing framework and transformation utilities, including cartographic transformations.

```perl
perldoc PDL::Tests
perldoc PDL::Transform
perldoc PDL::Transform::Cartography
```

--------------------------------

### Compile and Install Cairo Graphics Library

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Mac-OS-X

Commands to compile and install the Cairo graphics library after configuration. This step is crucial for enabling various graphics output formats supported by Cairo.

```bash
make
sudo make install
```

--------------------------------

### Initialize SDL Application and Draw Sine Wave

Source: https://github.com/pdlporters/pdl/wiki/Example/Animation-with-SDL

Demonstrates the initialization of an SDL application window and the manual drawing of a sine wave using SDL::Rect as a pen. This example highlights the low-level nature of SDL graphics and serves as a basic implementation pattern for custom rendering.

```perl
#!/usr/bin/perl
use warnings;
use strict;

use SDL;
use SDL::App;
use SDL::Rect;
use SDL::Color;

# User defined pen-nib size.
my $nib_size = 3;

# Create the SDL App
my $app = SDL::App->new(
	-width  => 640,
	-height => 480,
	-depth  => 16,
	-title  => "Hello, World!",
);

# our nib will be white
my $nib_color = SDL::Color->new(
		-r => 0xff,
		-g => 0xff,
		-b => 0xff,
	);

# and our nib will be represented by a rectangle
my $nib = SDL::Rect->new(
	-height => $nib_size,
	-width  => $nib_size,
);

# now draw a sine wave
my $t = 0;
my $t_step = 2**-4;
for($t = 0; $t < 10; $t += $t_step) {
    # Drawing logic would follow here
}
```

--------------------------------

### Getting PDL Array Dimensions

Source: https://github.com/pdlporters/pdl/wiki/Documentation/PDL-for-Matlab-users

To get the size of the longest dimension in a PDL array, calculate it using 'pdl($pdl->dims)->max'. The 'dims' method returns a Perl list of dimensions.

```perl
use PDL;

my $matrix = pdl([[1, 2, 3], [4, 5, 6]]);

# Get dimensions as a Perl list
my @dims_list = $matrix->dims;
print "Dimensions list: @dims_list\n";

# Get the size of the longest dimension
my $max_dim_size = pdl(@dims_list)->max;
print "Max dimension size: $max_dim_size\n";
# Output:
# Dimensions list: 2 3
# Max dimension size: 3
```

--------------------------------

### Run PDL Demos

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Gentoo

Executes the built-in demonstration scripts within the PDL interactive shell to showcase its capabilities. This command is run after launching the perldl prompt.

```bash
demo
```

--------------------------------

### Initialize Simulation Parameters with Variables and Gaussian Velocities in Perl

Source: https://github.com/pdlporters/pdl/wiki/Example/Animation-with-SDL

This Perl code snippet demonstrates the initialization of system parameters for the particle simulation. It introduces variables like '$particle_size' for better readability and uses 'grandom' to generate velocities from a Gaussian distribution, providing more realistic particle movement.

```perl
# Set up the system parameters, including random positions and velocities.
my $d_t = 2**-3;
my $side_length = 200;
my $particle_size = 5;
my $numb_of_atoms = 100;
my $positions = random(2, $numb_of_atoms) * $side_length;
my $velocities = grandom(2, $numb_of_atoms) * 5;
```

--------------------------------

### IDL Variable Assignment Examples

Source: https://github.com/pdlporters/pdl/wiki/Documentation/PDL-for-IDL-users

Demonstrates how to assign values to variables in IDL, including integers, arrays, and structures. IDL variables are typed and referred to by name.

```idl
A = 5             ; assign 5 to the variable A (short int by default)
B = indgen(5)     ; assign [0,1,2,3,4] to B (short int by default)
C = findgen(1e6)  ; assign [0..999999] to C (floats) 
D = {a:1,b:2,c:3} ; Set D to be an IDL structure
```

--------------------------------

### PDL Optimization and Minuit Documentation

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Mac-OS-X

Documentation for PDL's optimization routines, including simplex methods and the Minuit package for function minimization.

```perl
perldoc PDL::Minuit
perldoc PDL::Opt::Simplex
```

--------------------------------

### Perl/PDL Variable Assignment Examples

Source: https://github.com/pdlporters/pdl/wiki/Documentation/PDL-for-IDL-users

Shows equivalent variable assignments in Perl/PDL, illustrating the use of sigils ($ for scalars, @ for lists, % for hashes) to denote variable types and namespaces.

```perl
$a = 5;      # assign 5 to the perl scalar A 
@b = (0..4); # assign the list (0,1,2,3,4) to B 
$c = xvals(1e6); # Assign the sequence 0..999999 to C.
%d = (a=>1,b=>2,c=>3); # Set %d to be a perl hash.
```

--------------------------------

### PDL Elementwise Assignment Example

Source: https://github.com/pdlporters/pdl/wiki/Documentation/PDL-for-IDL-users

Demonstrates how to assign values to a subset of a PDL using elementwise assignment. This method copies elements individually into the lvalue, modifying the original PDL.

```perl
$a = zeroes(3,3);
$a->diagonal(0,1) .= pdl(1,2,3);
print $a;
```

--------------------------------

### Perl Conditional Statement

Source: https://github.com/pdlporters/pdl/wiki/Documentation/PDL-for-Matlab-users

A standard 'if-elsif-else' conditional statement in Perl. It mirrors the logic of the MATLAB example, comparing a value against maximum and minimum thresholds. The 'print' function is used for output, and variables are prefixed with '$'.

```perl
 # Perl conditional
 if ($value > $MAX) {
     print "Value too large\n";
 } elsif ($value < $MIN) {
     print "Value too small\n";
 } else {
     print "Value is perfect\n";
 }
```

--------------------------------

### Create and Inspect a 2D PDL Array

Source: https://github.com/pdlporters/pdl/wiki/Documentation/Wikibook/Introduction-to-PDL-Threading

Demonstrates creating a 2D array using `sequence` and inspecting its dimensions and information using `->dims` and `->info`.

```PDL
pdl2
$a = sequence(11,9);
p p $a;
p $a->dims;
p $a->info;
```

--------------------------------

### PDL Header Manipulation

Source: https://github.com/pdlporters/pdl/wiki/Documentation/PDL-for-IDL-users

Illustrates how to set, get, and copy headers associated with PDL variables. Headers are hash references used for storing metadata. `hdr` and `fhdr` methods automatically create headers if they don't exist.

```perl
$a->sethdr(\%hdr);          # Set the header to an existing hash
$hdr_ref = $a->gethdr       # Get a ref to the header.
$hdr2 = $a->hdr_copy;       # Copy the header.
$a->hdr->{CTYPE1} = "Lon";  # Set a header value (safely)
$a->fhdr->{CtYpE2} = "Lat"; # Set FITS keyword (case insensitive)
```

--------------------------------

### Perl Ternary Operator for Conditional Assignment

Source: https://github.com/pdlporters/pdl/wiki/Documentation/PDL-for-IDL-users

Illustrates the use of Perl's ternary operator '?:' for concise conditional assignments. The first example calculates arcsine, and the second assigns an axis label based on a variable's header information.

```perl
$arcsin = (abs($s) > 1) ? asin(1/$s) : asin($s);
$title = (defined $var->hdr->{NAXIS}) ? $var->hdr->{CTYPE1} : '(Arbitrary)';
```

--------------------------------

### Initialize PDL Environment and Lvalue Subroutines

Source: https://github.com/pdlporters/pdl/wiki/Example/Example-perldlrc

This Perl script loads standard PDL modules including graphics, FFT, and disk caching. It also explicitly marks core indexing and slicing functions as lvalues to allow direct assignment to PDL slices.

```perl
require('PDL/default.perldlrc');

use PDL::Graphics::PGPLOT;
use PDL::Graphics::PGPLOT::Window;
use PDL::AutoLoader;
use PDL::Image2D;
use PDL::FFT;
use PDL::DiskCache;
eval 'use PDL::IO::Dumper';

sub PDL::diagonal : lvalue;
sub PDL::slice(;@): lvalue;
sub PDL::dice    : lvalue;
sub PDL::dice_axis: lvalue;
sub PDL::index(;@): lvalue;
sub PDL::index2d(;@) : lvalue;
sub PDL::mslice  : lvalue;

$PDL::AutoLoader::Rescan = 1;

1;
```

--------------------------------

### PDL Input/Output Operations Documentation

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Mac-OS-X

Man pages covering various input and output operations in PDL, including browser, DICOM, raw files, FITS, GD, and more.

```perl
perldoc PDL::IO
perldoc PDL::IO::Browser
perldoc PDL::IO::Dicom
perldoc PDL::IO::FastRaw
perldoc PDL::IO::FITS
perldoc PDL::IO::FlexRaw
perldoc PDL::IO::GD
perldoc PDL::IO::Misc
perldoc PDL::IO::NDF
perldoc PDL::IO::Pnm
perldoc PDL::IO::Storable
```

--------------------------------

### Configure SSH for Remote Installation

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-Using-cpanm

Configures environment variables for X11 forwarding over SSH to prevent OpenGL errors during installation.

```bash
ssh -X user@hostname
export LIBGL_ALWAYS_INDIRECT=y
```

--------------------------------

### Install System Dependencies

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-Using-cpanm

Installs necessary system-level libraries and headers required for compiling PDL and its graphics modules on Ubuntu.

```bash
sudo apt-get install libxi-dev libxmu-dev freeglut3-dev libgsl0-dev \
libnetpbm10-dev libplplot-dev pgplot5 build-essential gfortran
```

--------------------------------

### Initialize Particle Simulation Dynamics with PDL

Source: https://github.com/pdlporters/pdl/wiki/Example/Animation-with-SDL

Sets up the initial state of a particle system using PDL, including random positions and velocities. The compute function updates particle positions based on a constant time step.

```perl
#!/usr/bin/perl
use warnings;
use strict;
use PDL;

my $d_t = 2**-3;
my $side_length = 200;
my $numb_of_atoms = 100;
my $positions = random(2, $numb_of_atoms) * $side_length;
my $velocities = random(2, $numb_of_atoms) * 6;

sub compute {
	$positions += $d_t * $velocities;
}
```

--------------------------------

### Initialize the PDL interactive shell

Source: https://github.com/pdlporters/pdl/blob/master/README.md

Commands to launch the interactive PDL shell (perldl) either from the source build directory or after a system-wide installation.

```bash
# From the root of the PDL source tree
perl -Mblib blib/script/perldl

# After installation
pdl
```

--------------------------------

### Verify PDL Installation

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-Using-cpanm

Runs a Perl script to verify that PDL and its graphics modules (PGPLOT, TriD) are correctly installed and functional.

```perl
perl -e '
use PDL; 
use PDL::Graphics::PGPLOT; 
use PDL::Graphics::TriD; 
print qq[success\n]'
```

--------------------------------

### Install PDL Package on Gentoo

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Gentoo

Installs the PDL development packages for Perl on a Gentoo system. This command requires root privileges.

```bash
emerge dev-perl/PDL
```

--------------------------------

### Install PDL Dependencies via cpanm

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Mac-OS-X

Commands to install required Perl modules ExtUtils::F77 and OpenGL using cpanm.

```shell
sudo cpanm ExtUtils::F77
sudo cpanm OpenGL
```

--------------------------------

### PDL Pod and PP Documentation

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-Mac-OS-X

Documentation for PDL's POD (Plain Old Documentation) parsing utilities and its PP (Perl-to-C) preprocessor.

```perl
perldoc PDL::Pod::Parser
perldoc PDL::Pod::Select
perldoc PDL::Pod::Usage
perldoc PDL::PP
perldoc PDL::PP::Dump
perldoc PDL::PP::Signature
perldoc PDL::pptemplate
```

--------------------------------

### Install PDL System Dependencies

Source: https://github.com/pdlporters/pdl/wiki/Installing/Installing-PDL-on-a-Linux-Debian-based-operating-system-for-power-users

Updates the local package index and installs the necessary system-level libraries and compilers for PDL using apt-get.

```bash
apt-get update
apt-get install pdl pgplot5 libterm-readline-gnu-perl g77 libc6-dev libx11-dev netpbm
```