Hi,
I need to use Levenberg-Marquardt algorithm in C#. There is VI with Levenberg-Marquardt algorithm in LabVIEW and there is not in Measurement Studio (2008). I decided to create dll in LabVIEW and call it in C#.
So I created LevenbergMarquartFit.vi and Function.vi. I also created Test.vi. In Test.vi LevenbergMarquartFit.vi are called as vi and as function. It works correctly as vi and it doesn't work correctly as function call.
I also try to call fuction from C#.
Header file LevenbergMarquartFit.h is
========
void __cdecl LevenbergMarquartFit(double Tolerance, int32_t MaxIterations,
double Y[], double X[], double OffsetIn, double B2In, double A2In,
double B1In, double A1In, int32_t *Iterations, double Fit[], double *Offset,
double *B2, double *A2, double *B1, double *A1, double *Residue,
char Error[], int32_t len, int32_t len2, int32_t len3, int32_t len4);
========
I call from C#
=========
double [] AdYTimeBase = new double[ 64];
...
double dTolerance = 0.00000001;
int iMaxIterations = 1000;
//double[] AdY;
double dOffsetIn = Double.Parse(textBox_Offset.Text) * AdYTimeBase[ iTimeBasePoints - 1];
double dB2In = Double.Parse(textBox_B2.Text);
double dA2In = Double.Parse(textBox_A2.Text) * AdYTimeBase[iTimeBasePoints - 1];
double dB1In = Double.Parse(textBox_B1.Text);
double dA1In = Double.Parse(textBox_A1.Text) * AdYTimeBase[0];
int iIterations = 0;
double[] AdFit = new double[AdYTimeBase.Length];
double dOffset = 0;
double dB2 = 0;
double dA2 = 0;
double dB1 = 0;
double dA1 = 0;
double dResidue = 0;
string StrError = "";
int iLen = 0;
int iLen2 = 0;
int iLen3 = 0;
int iLen4 = 0;
LevenbergMarquartFit(dTolerance, iMaxIterations, AdYTimeBase, AdX,
dOffsetIn, dB2In, dA2In, dB1In, dA1In,
out iIterations, out AdFit,
out dOffset, out dB2, out dA2, out dB1, out dA1,
out dResidue, out StrError, out iLen, out iLen2, out iLen3, out iLen4);
==========
but program hangs at LevenbergMarquartFit() function.
Any help?
Thanks, Andrey.
