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transmission_error.cc
Go to the documentation of this file.
#include "rheolef.h"
using namespace rheolef;
using namespace std;
size_t d;
Float epsilon;
Float u (const point& x) {
Float x0 = (d <= 2) ? x[0] : x[1];
if (x0 < Float(0.5))
return x0*((1+3*epsilon)/(2*(1+epsilon)) - x0)/(2*epsilon);
else
return (1-x0)*(x0 + (1-epsilon)/(2*(1+epsilon)))/2;
}
int main(int argc, char**argv) {
environment rheolef (argc, argv);
Float error_linf_expected = (argc > 1) ? atof(argv[1]) : 1e+38;
field uh;
din >> catchmark("epsilon") >> epsilon
>> catchmark("u") >> uh;
d = uh.get_geo().dimension();
space Xh = uh.get_space();
field pi_h_u = lazy_interpolate(Xh, u);
field eh = pi_h_u - uh;
trial u (Xh); test v (Xh);
form m = integrate (u*v);
derr << "error_linf " << eh.max_abs() << endl
<< "error_l2 " << sqrt(m(eh,eh)) << endl;
return (eh.max_abs() < error_linf_expected) ? 0 : 1;
}
Float
see the Float page for the full documentation
field
see the field page for the full documentation
form
see the form page for the full documentation
point
see the point page for the full documentation
rheolef::catchmark
see the catchmark page for the full documentation
Definition catchmark.h:67
rheolef::environment
see the environment page for the full documentation
Definition environment.h:121
space
see the space page for the full documentation
test
see the test page for the full documentation
trial
see the test page for the full documentation
main
int main()
Definition field2bb.cc:58
rheolef
This file is part of Rheolef.
Definition compiler_eigen.h:39
rheolef::lazy_interpolate
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
rheolef::integrate
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
std
STL namespace.
rheolef.h
rheolef - reference manual
u
Definition leveque.h:25
epsilon
Float epsilon
Definition transmission_error.cc:25
d
size_t d
Definition transmission_error.cc:24