portelli/Grid
1
0
Fork 0
mirror of https://github.com/paboyle/Grid.git synced 2024-11-09 23:45:36 +00:00
Code Releases Activity

Functor initialisation

Browse Source
This commit is contained in:
Peter Boyle 2024-08-27 11:01:02 -04:00
parent c164bff758
commit 77944437ce
1 changed files with 21 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
Grid/algorithms/approx/Chebyshev.h
View File

@ -59,7 +59,7 @@ public:
RealD diff = hi-lo; RealD diff = hi-lo;
RealD delta = diff*1.0e-9; RealD delta = diff*1.0e-9;
for (RealD x=lo; x<hi; x+=delta) { for (RealD x=lo; x<hi; x+=delta) {
delta*=1.1; delta*=1.02;
RealD f = approx(x); RealD f = approx(x);
out<< x<<" "<<f<<std::endl; out<< x<<" "<<f<<std::endl;
} }
@ -131,6 +131,26 @@ public:
Coeffs[j] = s * 2.0/order; Coeffs[j] = s * 2.0/order;
} }
}; };
template<class functor>
void Init(RealD _lo,RealD _hi,int _order, functor & func)
{
lo=_lo;
hi=_hi;
order=_order;
if(order < 2) exit(-1);
Coeffs.resize(order);
for(int j=0;j<order;j++){
RealD s=0;
for(int k=0;k<order;k++){
RealD y=std::cos(M_PI*(k+0.5)/order);
RealD x=0.5*(y*(hi-lo)+(hi+lo));
RealD f=func(x);
s=s+f*std::cos( j*M_PI*(k+0.5)/order );
}
Coeffs[j] = s * 2.0/order;
}
};
void JacksonSmooth(void){ void JacksonSmooth(void){