Download LMA.NET (.NET 4.5.1)

The link above contains the full source code, including NUnit test files and VStudio 2013 solution of the LMA.NET library. The algorithm has been updated on 6/25/2010 - there was a defect due to low value of delta in the derivative function that sometimes caused singularities. The new value of delta is 1*10-9 which seems to work now.

Public constructor: public LMA(LMAFunction function, double[] parameters, double[][] dataPoints, double[] weights, GeneralMatrix alpha, double argDeltaChi2, int argMaxIter)

  • function: function to fit the experimental data. Inherits from the LMA Function
  • parameters: vector with initital parameters
  • dataPoints: array containing experimental data that will be used in the fit
  • weights: array of doubles with weights to experimental points
  • Alpha: matrix
  • epsilon: accuracy of the final result
  • itMax: max number of iteration
function to call to execute minimum search: public void Fit()

Mimium is stored in the Parameters property of the object

Full NDoc documentation is here