GAUSS (software)
GAUSS is a matrix programming language for mathematics and statistics, developed and marketed by Aptech Systems. Its primary purpose is the solution of numerical problems in statistics, econometrics, time-series, optimization and 2D- and 3D-visualization. It was first published in 1984 for MS-DOS and is available for Linux, macOS and Windows.[1]
| _logo.png.webp) | |
| Developer(s) | Aptech Systems | 
|---|---|
| Initial release | 1984 | 
| Stable release | 21
   /    17 December 2020 | 
| Operating system | Linux, macOS, Windows | 
| Type | programming language | 
| License | proprietary | 
| Website | www.aptech.com | 
Examples
    
- GAUSS has several Application Modules as well as functions in its Run-Time Library (i.e., functions that come with GAUSS without extra cost)
- Qprog – Quadratic programming
- SqpSolvemt – Sequential quadratic programming
- QNewton - Quasi-Newton unconstrained optimization
- EQsolve - Nonlinear equations solver
 
GAUSS Applications
    
A range of toolboxes are available for GAUSS at additional cost.[2]
| Toolbox | Description | 
|---|---|
| Algorithmic Derivatives | A program for generating GAUSS procedures for computing algorithmic derivatives. | 
| Constrained Maximum Likelihood MT | Solves the general maximum likelihood problem subject to general constraints on the parameters. | 
| Constrained Optimization | Solves the nonlinear programming problem subject to general constraints on the parameters. | 
| CurveFit | Nonlinear curve fitting. | 
| Descriptive Statistics | Basic sample statistics including means, frequencies and crosstabs. This application is backwards compatible with programs written with Descriptive Statistics 3.1. | 
| Descriptive Statistics MT | Basic sample statistics including means, frequencies and crosstabs. This application is thread-safe and takes advantage of structures. | 
| Discrete Choice | A statistical package for estimating discrete choice and other models in which the dependent variable is qualitative in some way. | 
| FANPAC MT | Comprehensive suite of GARCH (Generalized AutoRegressive Conditional Heteroskedastic) models for estimating volatility. | 
| Linear Programming MT | Solves small and large scale linear programming problems. | 
| Linear Regression MT | Least squares estimation. | 
| Loglinear Analysis MT | Analysis of categorical data using log-linear analysis. | 
| Maximum Likelihood MT | Maximum likelihood estimation of the parameters of statistical models. | 
| Nonlinear Equations MT | Solves systems of nonlinear equations having as many equations as unknowns. | 
| Optimization | Unconstrained optimization. | 
| Time Series MT | Exact ML estimation of VARMAX, VARMA, ARIMAX, ARIMA, and ECM models subject to general constraints on the parameters. Panel data estimation. Cointegration and unit root tests. | 
References
    
-  "Beginner Program: Nearest Neighbour Search". Aptech. Retrieved 2020-02-06. GAUSS does not require any particular file extension for GAUSS program files, however, .gss is recommended. 
- "Explore GAUSS Application Modules | Aptech". store.aptech.com. Retrieved 2022-03-29.
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