Doxygen Source Code Documentation
model_diffusion.c File Reference
#include <math.h>#include "NLfit_model.h"Go to the source code of this file.
Functions | |
| void | signal_model (float *gs, int ts_length, float **x_array, float *ts_array) |
| DEFINE_MODEL_PROTOTYPE MODEL_interface * | initialize_model () |
Function Documentation
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Definition at line 40 of file model_diffusion.c. References MODEL_interface::call_func, MODEL_interface::label, MODEL_interface::max_constr, MODEL_interface::min_constr, MODEL_SIGNAL_TYPE, MODEL_interface::model_type, MODEL_interface::params, MODEL_interface::plabel, signal_model(), and XtMalloc.
00041 {
00042 MODEL_interface * mi = NULL;
00043
00044 /*----- allocate memory space for model interface -----*/
00045 mi = (MODEL_interface *) XtMalloc (sizeof(MODEL_interface));
00046
00047
00048 /*----- define interface for the diffusion model -----*/
00049
00050 /*----- name of this model -----*/
00051 strcpy (mi->label, "ADC");
00052
00053 /*----- this is a signal model -----*/
00054 mi->model_type = MODEL_SIGNAL_TYPE;
00055
00056 /*----- number of parameters in the model -----*/
00057 mi->params = 2;
00058
00059 /*----- parameter labels -----*/
00060 strcpy (mi->plabel[0], "So");
00061 strcpy (mi->plabel[1], "D");
00062
00063 /*----- minimum and maximum parameter constraints -----*/
00064 mi->min_constr[0] = 0.0; mi->max_constr[0] = 32256.0;
00065 mi->min_constr[1] = 0.00; mi->max_constr[1] = .004;
00066
00067
00068 /*----- function which implements the model -----*/
00069 mi->call_func = &signal_model;
00070
00071
00072 /*----- return pointer to the model interface -----*/
00073 return (mi);
00074 }
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Definition at line 90 of file model_diffusion.c. Referenced by initialize_model().
00097 {
00098 int it; /* time index */
00099 float t; /* time = in this case actually b factor */
00100 float fval; /* time series value at time t */
00101
00102
00103 for (it = 0; it < ts_length; it++)
00104 {
00105 t = x_array[it][1];
00106 fval = gs[0] * exp(-t*gs[1]);
00107 ts_array[it] = fval;
00108 }
00109
00110 }
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