Free matrix classes software for linux

The C++ Foundation Classes package contains a Fully Overloaded String object that works with other classes (even those not owned by CFC), a full (template) Matrix and Vector Object, some Data types like DateTime, Boolean, Integer, Real, and Complex, and Sets, Stack, Queues, etc. C++ Foundation Classes also has an LL-type Parser and Scanner for lexical reading.

Installation:

The simplest way to compile this package is:

1. `cd to the directory containing the packages source code and type `./configure to configure the package for your system. If youre using `csh on an old version of System V, you might need to type `sh ./configure instead to prevent `csh from trying to execute `configure itself.

Running `configure takes awhile. While running, it prints some messages telling which features it is checking for.

2. Type `make to compile the package.

3. Optionally, type `make check to run any self-tests that come with the package.

4. Type `make install to install the programs and any data files and documentation.

5. You can remove the program binaries and object files from the source code directory by typing `make clean. To also remove the files that `configure created (so you can compile the package for a different kind of computer), type `make distclean. There is also a `make maintainer-clean target, but that is intended mainly for the packages developers. If you use it, you may have to get all sorts of other programs in order to regenerate files that came with the distribution.

TERMatrix software emulates "The Matrix" on your VT-100 compatible terminal 8^).

It has been tested on GNU/Linux.

Installation:

To compile, just type ``make.
To enter the matrix, just type ``./termatrix.
To end it, just press CTRL-c .

"The Matrix" is a movie from Warner Bros. Inc. Warner Bros. Inc. isnt affiliated in any way with TERMatrix.

Matrix Public Net spreads short voice messages through a web of trust; credibility decays until a threshold where the message is dropped.

Matrix Public Net comes with a program for recording and sending messages as well as plugins for XMMS and WinAmp that play received messages.

Extending the Blogosphere

This is a proposal for the extension of the Blogosphere, the network of Weblogs.
Individual Blogs are connected by their users implicitly: a community emerges, because users regularly read and comment on others entries. By making this connexions explicit, a web of trust is created which functions like a reputation mechanism.

The resulting system leverages the advantages of social networks for the distribution of news. It can be implemented as a decentralised system, with a simple extension to the Blogosphere.

The system is explained in a paper and in the presentation at the Mobile Entertainment conference in Manchester.

The RSS MPN-Interest module is the first part of this extension.

Math::Matrix can multiply and invert Matrices.

The following methods are available:

new

Constructor arguments are a list of references to arrays of the same length. The arrays are copied. The method returns undef in case of error.

$a = new Math::Matrix ([rand,rand,rand],
[rand,rand,rand],
[rand,rand,rand]);

If you call new as method, a zero filled matrix with identical deminsions is returned.

clone

You can clone a matrix by calling:

$b = $a->clone;

size

You can determine the dimensions of a matrix by calling:

($m, $n) = $a->size;

concat

Concatenates two matrices of same row count. The result is a new matrix or undef in case of error.

$b = new Math::Matrix ([rand],[rand],[rand]);
$c = $a->concat($b);

transpose

Returns the transposed matrix. This is the matrix where colums and rows of the argument matrix are swaped.

multiply

Multiplies two matrices where the length of the rows in the first matrix is the same as the length of the columns in the second matrix. Returns the product or undef in case of error.

solve

Solves a equation system given by the matrix. The number of colums must be greater than the number of rows. If variables are dependent from each other, the second and all further of the dependent coefficients are 0. This means the method can handle such systems. The method returns a matrix containing the solutions in its columns or undef in case of error.

invert

Invert a Matrix using solve.

multiply_scalar

Multiplies a matrix and a scalar resulting in a matrix of the same dimensions with each element scaled with the scalar.

$a->multiply_scalar(2); scale matrix by factor 2

add

Add two matrices of the same dimensions.

substract

Shorthand for add($other->negative)

equal

Decide if two matrices are equal. The criterion is, that each pair of elements differs less than $Math::Matrix::eps.

slice

Extract columns:

a->slice(1,3,5);

determinant

Compute the determinant of a matrix.

dot_product

Compute the dot product of two vectors.

absolute

Compute the absolute value of a vector.

normalizing

Normalize a vector.

cross_product

Compute the cross-product of vectors.

print

Prints the matrix on STDOUT. If the method has additional parameters, these are printed before the matrix is printed.

pinvert

Compute the pseudo-inverse of the matrix: ((AA)^-1)A

EXAMPLE

use Math::Matrix;

srand(time);
$a = new Math::Matrix ([rand,rand,rand],
[rand,rand,rand],
[rand,rand,rand]);
$x = new Math::Matrix ([rand,rand,rand]);
$a->print("An");
$E = $a->concat($x->transpose);
$E->print("Equation systemn");
$s = $E->solve;
$s->print("Solutions sn");
$a->multiply($s)->print("A*sn");

Objective-C Foundation Classes is an Objective-C library.
It contains general purpose classes for easier development of applications, in areas such as data types, network, C library wrappers, collections, and compound classes.
The classes in the library are grouped in five clusters:
- DataTypes - integer, text string, fraction, bitarray, date/time, random generators, big integer, big double ...
- Collections - array, list, hash table, AVL and n-tree, circular array, graph ...
- Network - TCP/UDP server and client, HTTP client, Telnet client ...
- C-library wrappers - DBM, socket, MD5, regular expression, timer, file, directory, gzip and bzip2 file, text screen ...
- Compound - Argument parser, calendar, finite state machine, tokenizer, XML tree, discrete distribution, objective-c source tokenizer ...
Enhancements:
- A new class (DBigFraction) and a new protocol (DBitArithmetic) have been added to the library.
- There are also several bugfixes related to 64-bit platforms.
- The copy-constructor support has been improved, and as a result all collections can now be (deep) copied.
- There are some small bugfixes, and several classes have been extended with new methods.

classes::Test are functions to help with classes pragma testing.

SYNOPSIS

can_new
can_set_get
has_decl
has_class_const
has_mixins
has_mixins_hash

is_classes MyClass;
is_classes main;

is_throwable X::Mine;
is_classes_exc X::Mine;

Generic tests based on Test::Builder designed to help write unit tests for code that uses the classes pragma.

Class::Std is a Perl module to support for creating standard "inside-out" classes.

SYNOPSIS

package MyClass;
use Class::Std;

# Create storage for object attributes...
my %name : ATTR;
my %rank : ATTR;
my %snum : ATTR;

my %public_data : ATTR;

# Handle initialization of objects of this class...
sub BUILD {
my ($self, $obj_ID, $arg_ref) = @_;

$name{$obj_ID} = check_name( $arg_ref->{name} );
$rank{$obj_ID} = check_rank( $arg_ref->{rank} );
$snum{$obj_ID} = _gen_uniq_serial_num();
}

# Handle cleanup of objects of this class...
sub DEMOLISH {
my ($self, $obj_ID) = @_;

_recycle_serial_num( $snum{$obj_ID} );
}

# Handle unknown method calls...
sub AUTOMETHOD {
my ($self, $obj_ID, @other_args) = @_;

# Return any public data...
if ( m/A get_(.*)/ ) { # Method name passed in $_
my $get_what = $1;
return sub {
return $public_data{$obj_ID}{$get_what};
}
}

warn "Cant call $method_name on ", ref $self, " object";

return; # The call is declined by not returning a sub ref
}

This module provides tools that help to implement the "inside out object" class structure in a convenient and standard way.