Open Source Mathematics Software - Page 14

Jep is a Java package for parsing and evaluating mathematical expressions. It currently supports user defined variables, constants, and functions. The open-source Jep project was halted in favor of commercial development of version 3.0 upwards.

A collection of sparse Fourier transform codes developed by faculty at MSU. Currently codes for four different prototype sparse FFTs are here: 1.) DMSFT, implemented by Ruochuan Zhang. This is a fast, stable, noise robust, and *fully discrete* improvement on the ideas in GFFT below. It is THE BEST sparse FFT around!!! If you're looking for AAFFT, try this out first. 2.) AAFFT, implemented by Mark Iwen in 2008. This code is easy to use, and documented well, but not implemented very efficiently. It is much slower than it should be. 3.) GFFT, implemented by Ben Segal and Mark Iwen. This code is less easy to use, and also not terribly efficient. But, the *algorithm* itself is significantly simpler and has "essentially no parameters". 4.) MSFFT, implemented by David Lawlor and Bosu Choi. This code is fast, but is not terribly easy to use. The algorithm is robust to some noise, but requires a lot of parameter tuning. Enjoy at your own risk :), Mark Iwen

NCE Calculation Framework is a library of routines, models and data applicable to chemical and process engineering calculations, written in Java. -- NEW -- www.chesolver.com *ONLINE CALCULATORS*. A set of solvers to perform calculations consistently on any device, from smart-phone to desktop. The project includes the following ready to use software all based on the same core library: * Online Calculators at www.chesolver.com * Extensions for Libreoffice/Openoffice Calc spreadsheet: - NCE: https://extensions.libreoffice.org/extensions/nce - NCE-Units: https://extensions.libreoffice.org/extensions/nce-units Check out also our video channel: https://www.youtube.com/channel/UCt2EGdw33k2u19PnZAi8YJA

A neural network package for Octave! Goal is to be as compatible as possible to the one of MATLAB(TM).

Collection of pseudorandom number generators (PRNGs) implemented in QBASIC/QuickBASIC and avilable as DOS executables.

PopED (Population Experimental Design) is a software tool for computing optimal experimental designs. The software has been developed with an emphasis on drug trials based on population models (non-linear mixed effects models).

PortOpt [Portfolio Optimizer] is a C++ program (with Python binding) implementing the Markowitz(1952) mean-variance model with agent's linear indifference curves toward risk in order to find the optimal assets portfolio under risk. You have to provide PortOpt (in text files or - if you use the api - using your own code) the variance/covariance matrix of the assets, their average returns and the agent risk preference. It returns the vector of assets' shares that composes the optimal portfolio. In order to minimise the variance it internally uses QuadProg++, a library that implement the algorithm of Goldfarb and Idnani for the solution of a (convex) Quadratic Programming problem by means of an active-set dual method. This solution is very efficient as it allows to solve hundred of thousand of portfolio problems in seconds. PortOpt runs as a text/console tool so it can be easily used in your own scripts.

This is a simple application that give to the user the possibility to know prime numbers.

The ROSETTA C++ library is a collection of C++ classes and routines that enable discernibility-based empirical modelling and data mining. Comprises useful routines for machine learning in general and for rough set theory in particular.

A hybrid system simulation language similar to SHIFT and Lambda-SHIFT, written in Ruby and C. Combines numerical integration, state machines, and the breezy power of Ruby. To install: get ruby and then "gem install redshift".

SAC (Symbolic Analysis and Control) is a toolbox for people working in control theory. It will help to the analysis and synthesis of nonlinear systems described by state equations (with or without delays).

Cellular-Automata-based engine for generating random MIDI music

A calculator that shows how it got its answer! It supports variables (X, Y, Z etc.) and many pre-defined constants such as Pi etc. It also has most if not all the functions of a Scientific calculator. It was coded in VB6 but was updated and is now VB.NE

Algae is a programming language for numerical analysis. We wrote it because we needed a fast and versatile tool, capable of handling large systems. Algae has been applied to interesting problems in aerospace and related fields for more than a decade.

This application will give to you all trigonometrics unknows in a any triangle rectangle!

The project has moved to CodePlex. http://www.codeplex.com/dnAnalytics

Why is it quicker to express simple equations in plaintext that it is to write the equivalent LaTeX? Easylatex is a preprocessor to make writing LaTeX much quicker. Project activity mode (http://bayleshanks.com/pamv1 ): sporadic

Programmer's library for random numbers. Also random number generator testing code. Intended for simulation, games and "Monte-Carlo" algorithms.

The new site is at http://psychometricon.net/libirt/ Library of functions to estimate the items and abilities from the responses of subjects to a questionnaire. The IRT models supported are the logistic model, the multivariate logistic model, the graded model and smoothing by penalization and kernel.

This project is for maintaining a linux system that concentrates on math, logic, and geometry related softwares.

A library for multiple precision math - arbitrarily large numbers - in TCL. Based on the original mpexpr library from Tom Poindexter.

A set of *.m files for use with GNU Octave and *.sci files for SciLab. The purpose is to approximate measurement curves using natural splines.

An automatic 2D Delaunay mesh generator and solver for Finite Element Analysis. Can solve 2D field problems (Poisson and Helmholtz Equations). Can use LAPACK/ARPACK solvers producing OpenGL/Postscript output. Uses C/GTK/GTKGLExt/MFC. Runs on Win32/Unix.

pyFretCalc is a Python/PyQt program used to calculate the positions of the frets on fretted instruments (guitars, basses, etc..).

Spar is a math-oriented scripting language. It is simple, clean, and extensible.