| T O P I C R E V I E W |
| strömi |
Posted - 10/02/2012 : 10:01:26 AM
Hello,
i just try to work with d01smc.
I have experimental results wich follow an exponential function:
f=exp{k1*c}
k1: const.
c: variable
Furthermore i know the correlation of differential equotation which is: dc/dt=k1*c
Now i want to identify the const. k1 with the help of the d01smc.
My first try :
#include <origin.h>
struct user // parameters in the integrand
{
double amp;
};
static double NAG_CALL f_callback(double t, Nag_User *comm)
{
struct user *sp = (struct user *)(comm->p);
double amp; // temp variable to accept the parameters in the Nag_User communication struct
amp = sp->amp;
return exp(amp*t);
}
// Add your special include files here.
// For example, if you want to fit with functions from the NAG library,
// add the header file for the NAG functions here.
// Add code here for other Origin C functions that you want to define in this file,
// and access in your fitting function.
// You can access C functions defined in other files, if those files are loaded and compiled
// in your workspace, and the functions have been prototyped in a header file that you have
// included above.
// You can access NLSF object methods and properties directly in your function code.
// You should follow C-language syntax in defining your function.
// For instance, if your parameter name is P1, you cannot use p1 in your function code.
// When using fractions, remember that integer division such as 1/2 is equal to 0, and not 0.5
// Use 0.5 or 1/2.0 to get the correct value.
// For more information and examples, please refer to the "User-Defined Fitting Function"
// section of the Origin Help file.
//----------------------------------------------------------
//
void _nlsfnag_integration_fitting(
// Fit Parameter(s):
double k1,
// Independent Variable(s):
double t,
// Dependent Variable(s):
double& c)
{
// Beginning of editable part
double epsabs = 0.0, epsrel = 0.0001, a = 0.0;
Integer max_num_subint = 200;
double result, abserr;
Nag_QuadProgress qp;
static NagError fail;
Nag_User comm;
struct user s;
s.amp = k1;
comm.p = (Pointer)&s;
nag_1d_quad_inf_1(f, Nag_UpperSemiInfinite, a, epsabs, epsrel,
max_num_subint, &result, &abserr, &qp, &comm, &fail);
NAG_FREE(qp.sub_int_beg_pts);
NAG_FREE(qp.sub_int_end_pts);
NAG_FREE(qp.sub_int_result);
NAG_FREE(qp.sub_int_error);
return exp(t*k1);
// End of editable part
}
The error: line 19 : illegal function argument typ & syntax error in function declaration
|
| 2 L A T E S T R E P L I E S (Newest First) |
| strömi |
Posted - 10/19/2012 : 08:07:35 AM
okay now i got the first problem i think. But i have a new one =):
this is my code now:
#pragma numlittype(push, TRUE)
#pragma numlittype(push, TRUE)
#pragma numlittype(push, TRUE)
#pragma numlittype(push, TRUE)
#pragma numlittype(push, TRUE)
#pragma numlittype(push, TRUE)
#pragma numlittype(push, TRUE)
#pragma numlittype(push, TRUE)
#pragma numlittype(push, TRUE)
#pragma numlittype(push, TRUE)
#pragma numlittype(push, TRUE)
#include <OC_nag.h>
struct user // parameters in the integrand
{
double amp;
};
static double NAG_CALL f(double t, Nag_User *comm) // nehme callback raus siehe d01smc
{
struct user *sp = (struct user *)(comm->p);
double amp; // temp variable to accept the parameters in the Nag_User communication struct
amp = sp->amp;
return amp*t;
}
// Add your special include files here.
// For example, if you want to fit with functions from the NAG library,
// add the header file for the NAG functions here.
// Add code here for other Origin C functions that you want to define in this file,
// and access in your fitting function.
// You can access C functions defined in other files, if those files are loaded and compiled
// in your workspace, and the functions have been prototyped in a header file that you have
// included above.
// You can access NLSF object methods and properties directly in your function code.
// You should follow C-language syntax in defining your function.
// For instance, if your parameter name is P1, you cannot use p1 in your function code.
// When using fractions, remember that integer division such as 1/2 is equal to 0, and not 0.5
// Use 0.5 or 1/2.0 to get the correct value.
// For more information and examples, please refer to the "User-Defined Fitting Function"
// section of the Origin Help file.
//----------------------------------------------------------
//
void _nlsfnag_integration_fitting(
// Fit Parameter(s):
double k1,
// Independent Variable(s):
double t,
// Dependent Variable(s):
double& c)
{
// Beginning of editable part
double epsabs = 0.0, epsrel = 0.0001, a = 0.0;
Integer max_num_subint = 200;
double result, abserr;
Nag_QuadProgress qp;
static NagError fail;
Nag_User comm;
struct user s;
s.amp = k1;
comm.p = (Pointer)&s;
nag_1d_quad_inf_1(f, Nag_UpperSemiInfinite, a, epsabs, epsrel,
max_num_subint, &result, &abserr, &qp, &comm, &fail);
t*k1;
// End of editable part
}
The problem is : When i push the simulate button i get no curve. Furthermore i have to indicate k1.
|
| tenagadalam |
Posted - 10/04/2012 : 12:04:13 PM
curious about that too :)
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