gcc
-shared integration.o integration_mi.o -o libgsl_integration_MI.so
[.dll for windows])
Integrand-setup-model USAGE: To create an integrand, simply
duplicate one of the example models (like 'CreateIntegrand') and
change the String 'C_integrand' for the desired mathematical
function in standard C-syntax. This setup model then needs to be
"simulated" (it actually only copies/creates files, compiles and
archives them) before the simulation of a larger model. The larger
model may then include multiple uses of the relevant 'integrand'
(e.g., in qag or other GSL integration routines).
example function: c*e-p*x*x =
c*exp(-p*x2)
in C-syntax:
"par[0]*exp(-par[1]*x*x)"
Note the possibility to place parameters (always with 'par'
and always starting with index 0). The values of these can then be
set during the larger model runtime (see the integration blocks).
In other words, the parameters and the integration endpoints can be
functions of time.
[A bit more info: If one is not already present in the model,
a direct call to a GSL function appears to be required to have the
GSL library load along with the GSL/Modelica interface
('gsl_integration_MI'). E.g.,...
final parameter Real kludge =
Functions.specfunc.gamma(1);
These are put in at the integration function level, so no
further action should be necessary on the user's part.]
.GNU_ScientificLibrary.Examples.integration.IntegrationUsersGuide