Online Math Tutor

Math::NoCarry is a Perl extension for no carry arithmetic. SYNOPSIS use Math::NoCarry; my $sum = Math::NoCarry::add( 123, 456 ); my $difference = Math::NoCarry::subtract( 123, 456 ); my $product = Math::NoCarry::multiply( 123, 456 ); No carry arithmetic doesnt allow you to carry...

online.php analyses /var/log/ppp-usage and displays connection statistics. It also prints some information about your current PPP connection. Well, I was inspired by the script Onlinecalc by Michael Schlenstedt (Michael@adsl4linux.de). His script is heavily based upon "calc" by Ulrich Schmitz....

SYNOPSIS use Math::FresnelZone; use Math::FresnelZone qw(fresnel fresnelMi fresnelKm); The arguments are: 0 - distance in kilometers or miles (default is 1), 1 - frequency in GHz (defualt 2.4), 2 - set to true to specify that the distance you are inputting is in miles and that the...


Platforms: *nix

Math::HashSum can sum a list of key-value pairs on a per-key basis. SYNOPSIS use Math::HashSum qw(hashsum); my %hash1 = (a=>.1, b=>.4); my %hash2 = (a=>.2, b=>.5); my %sum = hashsum(%hash1,%hash2); print "$sum{a}n"; # Prints .3 print "$sum{b}n"; # Prints .9 This module allows you to...


Platforms: *nix

Math::Numbers is a Perl module that contains methods for mathematical approaches of concepts of the number theory. SYNOPSIS use Math::Numbers; my $a = 123; my $b = 34; my $numbers = Math::Numbers->new($a, $b [, ...]); print "They are coprimes (relatively primes)!n" if...


Platforms: *nix

Online is a speed focused program to give a textual display of your friends/buddies currently logged onto a unix host. This program is distributed in the hope that it will be useful for everyone, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A...


Platforms: *nix

Math::CDF is a Perl module to generate probabilities and quantiles from several statistical probability functions. SYNOPSIS use Math::CDF; $prob = &Math::CDF::pnorm(1.96); if( not defined($z = &Math::CDF::qnorm(0.975)) ) { die "qnorm() failed"; } or use Math::CDF qw(:all); $prob =...


Platforms: *nix

Math::Vec is a Object-Oriented Vector Math Methods in Perl. SYNOPSIS use Math::Vec; $v = Math::Vec->new(0,1,2); or use Math::Vec qw(NewVec); $v = NewVec(0,1,2); @res = $v->Cross([1,2.5,0]); $p = NewVec(@res); $q = $p->Dot([0,1,0]); or use Math::Vec qw(:terse); $v = V(0,1,2); $q...


Platforms: *nix

Math::Telephony::ErlangC is a Perl extension for Erlang C calculations. SYNOPSIS use Math::Telephony::ErlangC; # Evaluate probability that a service request will have to wait $wprob = wait_probability($traffic, $servers); # Probability that the wait time will be less than a fixed maximum...


Platforms: *nix

Math::Telephony::ErlangB is a Perl extension for Erlang B calculations. SYNOPSIS use Math::Telephony::ErlangB qw( :all ); # Evaluate blocking probability $bprob = blocking_probability($traffic, $servers); $gos = gos($traffic, $servers); # Same result as above # Dimension minimum number...


Platforms: *nix

Math::Expr is a Perl module that parses mathematical expressions. SYNOPSIS require Math::Expr; $p=new Math::Expr; $e=$p->Parse("a+4*b-d/log(s)+f(d,e)"); Parses mathematical expressions into a tree structure. The expressions may contain integers, real numbers, alphanumeric variable names,...


Platforms: *nix

Math::BaseCalc is a Perl module that can convert numbers between various bases. SYNOPSIS use Math::BaseCalc; my $calc = new Math::BaseCalc(digits => [0,1]); #Binary my $bin_string = $calc->to_base(465); # Convert 465 to binary $calc->digits(oct); # Octal my $number =...


Platforms: *nix

Math::BaseArith is a Perl extension for mixed-base number representation (like APL encode/decode). SYNOPSIS use Math::BaseArith; encode( value, base_list ); decode( representation_list, base_list ); The inspiration for this module is a pair of functions in the APL programming language...


Platforms: *nix

Math::Pari is a Perl interface to PARI. SYNOPSIS use Math::Pari; $a = PARI 2; print $a**10000; or use Math::Pari qw(Mod); $a = Mod(3,5); print $a**10000; This package is a Perl interface to famous library PARI for numerical/scientific/number-theoretic calculations. It allows use of...


Platforms: *nix

Online Contact Sheet Creator script that generate stylish contact sheets without any fussing around in Photoshop. You can use the script to generate contact sheets for clients (great for photographers or graphic designers), or you can use it personally for a small photo album. You can also...


Platforms: *nix

SYNOPSIS use Math::MatrixReal; use Math::MatrixReal::Aug; These are certain extra methods for Math::MatrixReal, in the tradition of Math::MatrixReal::Ext1; $matrix1->augmentright($matrix2); Creates a new matrix of the form [$matrix1 $matrix2]. $matrix1 and $matrix2 must have the same...


Platforms: *nix

Math::Random::MT::Auto is a Perl module for auto-seeded Mersenne Twister PRNGs. SYNOPSIS use strict; use warnings; use Math::Random::MT::Auto qw(rand irand shuffle gaussian), /dev/urandom => 256, random_org; # Functional interface my $die_roll = 1 + int(rand(6)); my $coin_flip =...


Platforms: *nix

Browseable Online Backup System (BOBS) is a complete online backup system. It uses large disks for storing backups and lets users browse and restore the files using a webbrowser. Files are fetched from other computers and stored in directories on the computer where bobs is installed. Two types...


Platforms: *nix

Math::Amoeba is a Multidimensional Function Minimization. SYNOPSIS use Math::Amoeba qw(ConstructVertices EvaluateVertices Amoeba MinimiseND); my ($vertice,$y)=MinimiseND(@guess,@scales,&func,$tol,$itmax,$verbose); my @vertices=ConstructVertices(@vector,@offsets); my...


Platforms: *nix

Math::Polynomial::Solve is a Perl module to find the roots of polynomial equations. SYNOPSIS use Math::Complex; # The roots may be complex numbers. use Math::Polynomial::Solve qw(poly_roots); my @x = poly_roots(@coefficients); or use Math::Complex; # The roots may be complex numbers....


Platforms: *nix