Feature List - Optimization Modeling Tools
Fast, Easy Application Development - The LINDO API makes it easy for you to seamlessly integrate optimization into your own application. The developer interface has been designed for maximum ease-of-use and flexibility. It comes with clear, comprehensive documentation and examples to help you get running quickly.
Powerful Solvers - LINDO API provides you with an arsenal of powerful solvers for linear, nonlinear (convex & nonconvex), quadratic, quadratically constrained, second order cone and integer optimization. All solvers incorporate numerous enhancements for maximum speed and robustness.
Comprehensive Set of Routines - Whether your application is big or small, simple or complex, the LINDO API provides the flexibility and functionality that you'll need. It includes dozens of routines to formulate, solve, query, and modify your problems.
Convenient Interface to MATLAB - The LINDO API can be run as a MATLAB callable function. Using MATLAB's modeling and programming environment, you can build and solve models and create custom algorithms based upon the LINDO API 's routines and solvers.
Analyze Infeasible and Unbounded Models - LINDO API includes tools that allow you to track down what has caused a model to be infeasible or unbounded. The tools isolate a portion of the original model as the source of the problem. This allows you to focus your attention on a relatively small subsection of the model to look for formulation or data entry errors. On infeasible linear, nonlinear, quadratic and integer models, the tools can find an irreducibly inconsistent set of constraints (IIS), and on unbounded models, the tools can find an irreducibly unbounded set of columns (IUS).
Create Web and Intranet Applications - The LINDO API is thread safe to allow you to create web and network applications that handle multiple user sessions concurrently. Web and network applications require special licensing.
Model Size Flexibility - Why pay for more capacity than you need? The LINDO API is available in a variety of different capacities. The capacities range from a few hundred variables to versions with unlimited capacity, so you can select the product that best suits your needs for a particular problem.
The new release includes significant speed and reliability improvements to all the major solvers as well as a number of other enhancements.
Large linear models solve an average of 80% faster using the newly enhanced Dual and Primal Simplex solvers. The Simplex solvers provide improved handling of numerically difficult problems.
The Barrier method solves large scale models an average of 20% faster. Enhancements have boosted performance on linear and quadratic problems and improved handling of numerically difficult models.
The Integer solver is an average of 40% faster on a wide range of integer models. Good solutions to difficult integer programs are found more quickly.
The general Nonlinear Solver is an average of 25% faster on highly nonlinear and complex models.
The Global solver includes a number of enhancements for solving nonconvex nonlinear models to global optimality. Additional enhancements improve performance on nonlinear problems with integer variables and/or non-smooth functions.
The new release can take advantage of multi-core machines to determine the best solver for linear programming models. Users can assign different cores to run different solvers in parallel, and LINGO will return the solution from the first solver to finish.
A new feature allows LINGO to return a list of the best solutions to integer models. The user can scroll through the solutions, examine them, and select the one of most interest based on the value of a trade off variable.
Support has been added for semi-continuous variables and Special Ordered Sets (SOS). Semi-continuous variables can take a value of 0 or lie within some non-negative range.SOS are sets of binary variables that are of type SOS1 (at most one nonzero), SOS2 (at most two nonzero and adjacent) and SOS3 (variables must sum to 1).
What's Best! 9.0, a new release of Solver add-in for Excel, is faster and more powerful and adds support for the recently released Microsoft® Office 2007, and Microsoft® Vista®.
What's Best! 9.0 is an average of 80% faster at solving linear models due to enhancements to the Dual and Primal Simplex solvers. The Barrier solver is an average of 20% faster on large scale linear and quadratic models. Enhancements to the Simplex and Barrier solvers also improve handling of numerically difficult problems.
The Integer solver is an average of 40% faster on a wide range of integer models. It also includes a number of enhancements to more quickly find and improve integer solutions and to better exploit a wider range of problem structures.
The general Nonlinear Solver is an average of 25% faster on highly nonlinear and complex models. The Global solver includes a number of enhancements for improving robustness on solving nonconvex nonlinear models to global optimality.
Release 9.0 has expanded support to include the recently released Microsoft Office Excel® 2007 in addition to support for Excel® 2003.
Function support has been greatly expanded with the new release. The new release adds support for all native Excel functions as well as user defined functions in Excel®. Also new is the support of functions using text strings as arguments.
Solver Suite
Day in and day out, LINDO systems optimizers provide critical answers to thousands of businesses around the world. Now, our three most popular packages have been bundled together to give you the most powerful and comprehensive set of tools for learning and applying mathematical programming.
LINDO API - Premier Optimization Engine
The Optimization Standard LINDO has been consistently chosen as the most popular modeling and optimization software for both instruction and research. It is our most traditional package for solving linear, integer and quadratic optimization models. Models are expressed in a simple, straight forward equation style. LINDO offers a comprehensive set of tools for studying the inner working of the revised Simplex Method, as well as advanced features for goal programming and parametric analysis.
LINGO Modeling Environment and Solver
Modeling Environment and Solver LINGO combines a full featured modeling environment with a set of solvers for linear, integer, and nonlinear models. Beginning models will appreciate the easy, natural style of model expression and the comfortable windows interface. Power modelers will love the option to use the advance modeling language, library of mathematical functions, & the ability to read data from external files and spreadsheet.
What's Best! - The Spreadsheet Solver
What'sBest! solves linear, nonlinear, and integer models in today's most popular tool for modeling business problems--the spreadsheet. What'sBest! is a natural extension of Microsoft Excel, allowing spreadsheet users to begin optimization modeling almost immediately. Models are easy to build and understand in a free form layout using standard spreadsheet equations.
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