Which will yield the following output (note that objective functions are different in the two cases, hence the large differences in f): f = 2125502. Model.AddGoal(null, GoalKind.Minimize, Model.Sum(x)) Model.AddConstraint(null, constraints = Model.GreaterEqual(Ax, b))
#Frontline solver mozek optimizestatus 1001 code
For your problem, this is of course not an issue.įor completeness, to formulate the LP problem instead, exchange the code between START NLP SECTION and END NLP SECTION with the following code: var m = A.GetLength(0) įor (var i = 0 i < n ++i) Ax += A * x If I am not mistaken, unlike GRG, Solver Foundation cannot support general non-linear constraints out-of-the-box, I believe you will need additional plug-ins to handle these. Generates the following solution, which should be in line with the solution from the linked Excel sheet: f = 254184688.179922 The above approach also seems too complicated, but maybe this is due to the Frontline Solver API. Here is my code for Solver SDK: static double A = new double ", i, x.GetDouble()) This should be fairly straightforward to formulate using the Solver Foundation, based on one of the LP samples.
#Frontline solver mozek optimizestatus 1001 how to
However I can’t seem to get anywhere with them because with MSF I can’t figure out how to define the goal and with Solver SDK I always get back status “optimal” and a solution of all 0s which is definitely not even a local minimum.
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I have tried to replicate this in C# using either Microsoft Solver Foundation or Solver SDK. So instead of using standard linear algebra I use Solver with the non-negative constraint, minimizing the sum of the squared differences, and get a reasonable solution. I am solving the classic A x = b problem but with the caveat that all components of x must be non-negative.
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Excel is required to create your model, but it's not required on the target system everything you need is contained with SolverSDK.dll. My problem is shown in the following spreadsheet. Manta makes it easy to find local businesses in your area using our vast small business directory finder. Solver Platform SDK has the ability to load Excel workbooks with optimization and simulation models (created using one of our Excel products) and solve them anywhere, from desktop to server to cloud. Language/OS SupportThe Solver Platform SDK offers both a modern high-level, object oriented API (Application Programming Interface) for C++, C, F, Visual Basic, VB.NET and Java, that enables you to define your model using objects such as a Problem, Solver, Model, Variable and Function, and a matching procedural API for C, Fortran, Pascal and similar languages that provides access to the same. It can be solved in Microsoft Excel with the Solver add-in, but I am having trouble replicating that in C#. I have a non-linear optimization problem with constraints.