Total library rewrite

.gitignore

@@ -1,3 +1,28 @@
+*.gem
+*.rbc
+.bundle
+.config
+.yardoc
+Gemfile.lock
+InstalledFiles
+_yardoc
+coverage
+doc/
+lib/bundler/man
+pkg
+rdoc
+spec/reports
+test/tmp
+test/version_tmp
+tmp
+*.bundle
+*.so
+*.o
+*.a
+mkmf.log
 *~
 coverage/*
-pkg/*
+*DS_Store
+.rvmrc
+.ruby-version
+.ruby-gemset

.rspec

@@ -1,3 +1,3 @@
 --color
--f s
--b
+--warnings
+--require spec_helper

.travis.yml

@@ -0,0 +1,11 @@
+script: rspec
+language: ruby
+notifications:
+  email: false
+rvm:
+  - 1.9
+  - 2.0
+  - 2.1
+before_install:
+  - sudo apt-get update -qq
+  - sudo apt-get install -y gsl-bin libgsl0-dev

Gemfile

@@ -0,0 +1,4 @@
+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in integration.gemspec
+gemspec

README.txt → LICENSE.txt

@@ -1,60 +1,25 @@
-= integration
+Copyright (c) 2005  Beng
+              2011  clbustos
+              2014  arrowcircle
 
-* http://github.com/clbustos/integration
-
-== DESCRIPTION:
-
-Numerical integration for Ruby, with a simple interface
-
-== FEATURES/PROBLEMS:
-
-* Use only one method: Integration.integrate
-* Rectangular, Trapezoidal, Simpson, Adaptive quadrature, Monte Carlo and Romberg integration methods available on pure Ruby. 
-* If available, uses Ruby/GSL QNG non-adaptive Gauss-Kronrod integration and QAG adaptive integration, with support for Infinity+ and Infinity- 
-
-
-== SYNOPSIS:
-
-  Integration.integrate(1,2,{:tolerance=>1e-10,:method=>:simpson}) {|x| x**2} => 2.333333
-
-  # Support for infinity bounds with GSL QAG adaptative integration
-
-  normal_pdf=lambda {|x| (1/Math.sqrt(2*Math::PI))*Math.exp(-(x**2/2))}
-  Integration.integrate(Integration::MInfinity, 0 , {:tolerance=>1e-10}, &normal_pdf) => 0.5
-  Integration.integrate(0, Integration::Infinity , {:tolerance=>1e-10}, &normal_pdf) => 0.5
-
-== REQUIREMENTS:
-
-* Ruby/GSL, for better performance and support for infinite bounds
-
-== INSTALL:
-
-  gem install integration
-
-== LICENSE:
-
-    Copyright (c) 2005  Beng
-                  2011  clbustos
-
     Permission is hereby granted, free of charge, to any person obtaining a
     copy of this software and associated documentation files (the "Software"),
     to deal in the Software without restriction, including without limitation
     the rights to use, copy, modify, merge, publish, distribute, sublicense,
     and/or sell copies of the Software, and to permit persons to whom the
     Software is furnished to do so, subject to the following conditions:
-    
+
     The above copyright notice and this permission notice shall be included in
     all copies or substantial portions of the Software.
-    
+
     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     THE DEVELOPERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
     OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     SOFTWARE.
-    
+
     Except as contained in this notice, the name of the Beng shall not
     be used in advertising or otherwise to promote the sale, use or other dealings
     in this Software without prior written authorization from Beng.
-

README.md

@@ -0,0 +1,56 @@
+# Integration
+
+[![Build Status](https://travis-ci.org/arrowcircle/integration.svg?branch=master)](https://travis-ci.org/arrowcircle/integration)
+Numerical integration for Ruby, with a simple interface
+
+## Installation
+
+Add gem `integration` to your Gemfile:
+
+	gem 'integration'
+
+## Usage:
+
+Integrate have only one method: `integrate`
+
+Without GSL:
+
+```
+Integration.integrate(1, 2, {tolerance: 1e-10, method: :simpson}) { |x| x**2 }
+=> 2.333333
+```
+With GSL (support for infinity bounds with GSL QAG adaptative integration):
+
+```
+func = ->(x) { (1/Math.sqrt(2 * Math::PI)) * Math.exp(-(x**2 / 2)) }
+
+Integration.integrate(Integration::MInfinity, 0, {tolerance: 1e-10 }, &func)
+=> 0.5
+
+Integration.integrate(0, Integration::Infinity, {tolerance: 1e-10}, &func)
+=> 0.5
+```
+
+## Available methods
+Pure Ruby methods:
+
+* Simpson (`:simpson`, default method)
+* Rectangular (`:rectangular`)
+* Trapezoidal (`:trapezoidal`)
+* Adaptive quadrature (`:adaptive_quadrature`)
+* Romberg (`:romberg`)
+* Monte Carlo (`:monte_carlo`, bad results)
+
+GSL methods:
+
+* QNG (`:qng`)
+* QAG (`:qag`)
+
+## REQUIREMENTS:
+
+Integration works only with Ruby 1.9+
+
+Integration depends on GSL ( GNU Scientific Library ) for infinity bounds and faster algoritms support.
+
+* For Mac OS X: `brew install gsl`
+* For Ubuntu / Debian: `sudo apt-get install gsl`

Rakefile

@@ -1,27 +1,2 @@
-# -*- ruby -*-
-$:.unshift(File.expand_path(File.dirname(__FILE__)+"/lib/"))
-require 'rubygems'
-require 'hoe'
-require 'integration'
-require 'rubyforge'
-
-# Hoe.plugin :compiler
-# Hoe.plugin :gem_prelude_sucks
- Hoe.plugin :git
-# Hoe.plugin :inline
-# Hoe.plugin :racc
-# Hoe.plugin :rubyforge
-
-Hoe.spec 'integration' do
-
-  self.developer('Ben Gimpert', 'NO_EMAIL')
-
-  self.developer('Claudio Bustos', 'clbustos_at_gmail.com')
-
-  self.version=Integration::VERSION
-  self.extra_dev_deps << ["rspec",">=2.0"] << ["rubyforge",">=0"]
-
-end
-# git log --pretty=format:"*%s[%cn]" v0.5.0..HEAD >> History.txt
-# vim: syntax=ruby
+require "bundler/gem_tasks"
 

integration.gemspec

@@ -0,0 +1,27 @@
+# coding: utf-8
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'integration/version'
+
+Gem::Specification.new do |spec|
+  spec.name          = 'integration'
+  spec.version       = IntegrationLib::VERSION
+  spec.authors       = ['Ben Gimpert', 'Claudio Bustos', 'Oleg Bovykin']
+  spec.email         = ['clbustos_at_gmail.com', 'oleg.bovykin@gmail.com']
+  spec.summary       = %q{Integration methods, based on original work by Beng}
+  spec.description   = %q{Numerical integration for Ruby, with a simple interface}
+  spec.homepage      = ''
+  spec.license       = 'MIT'
+
+  spec.files         = `git ls-files -z`.split("\x0")
+  spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
+  spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
+  spec.require_paths = ['lib']
+
+  spec.add_development_dependency 'bundler', '~> 1.6'
+  spec.add_development_dependency 'rake'
+  spec.add_development_dependency 'rspec'
+
+  spec.add_runtime_dependency 'rb-gsl'
+  spec.add_runtime_dependency 'activesupport'
+end