Rheolef  7.2
an efficient C++ finite element environment
 
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sinusprod_error.cc
Go to the documentation of this file.
1
25#include "rheolef.h"
26using namespace rheolef;
27using namespace std;
28#include "sinusprod.h"
29int main(int argc, char**argv) {
30 environment rheolef(argc, argv);
31 Float err_u_linf_expected = (argc > 1) ? atof(argv[1]) : 1e+38;
32 field uh; din >> uh;
33 geo omega = uh.get_geo();
34 space Xh = uh.get_space();
35 size_t k = Xh.degree();
36 size_t d = Xh.get_geo().dimension();
38 iopt.set_order(min(3*(k+1)+4,size_t(17)));
39 Float err_u_l2 = sqrt(integrate (omega, sqr(uh-u_exact(d)), iopt));
40 string opts = Xh.get_basis().option().stamp();
41 space Xh1 (omega, "P"+to_string(k+1)+"d"+opts);
42 field euh = lazy_interpolate (Xh1, uh-u_exact(d));
43 Float err_u_linf = euh.max_abs();
44 Float err_u_h1 = sqrt(integrate (omega, norm2(grad_h(euh)), iopt));
45 dout << "err_u_l2 " << err_u_l2 << endl
46 << "err_u_linf " << err_u_linf << endl
47 << "err_u_h1 " << err_u_h1 << endl;
48 return (err_u_linf <= err_u_linf_expected) ? 0 : 1;
49}
see the Float page for the full documentation
see the field page for the full documentation
see the geo page for the full documentation
see the environment page for the full documentation
see the integrate_option page for the full documentation
see the space page for the full documentation
int main()
Definition field2bb.cc:58
space_basic< T, M > Xh1
Definition field_expr.h:232
This file is part of Rheolef.
field_basic< T, M > lazy_interpolate(const space_basic< T, M > &X2h, const field_basic< T, M > &u1h)
see the interpolate page for the full documentation
Definition field.h:871
T norm2(const vec< T, M > &x)
norm2(x): see the expression page for the full documentation
Definition vec.h:379
std::enable_if< details::has_field_rdof_interface< Expr >::value, details::field_expr_v2_nonlinear_terminal_field< typenameExpr::scalar_type, typenameExpr::memory_type, details::differentiate_option::gradient > >::type grad_h(const Expr &expr)
grad_h(uh): see the expression page for the full documentation
std::enable_if< details::is_field_expr_v2_nonlinear_arg< Expr >::value &&!is_undeterminated< Result >::value, Result >::type integrate(const geo_basic< T, M > &omega, const Expr &expr, const integrate_option &iopt, Result dummy=Result())
see the integrate page for the full documentation
Definition integrate.h:211
STL namespace.
rheolef - reference manual
The sinus product function.