jiri/LA_library
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

*** empty log message ***

Browse Source
This commit is contained in:
jiri 2017-09-27 21:13:48 +00:00
parent 1ba3aab5ea
commit ebf079f739
1 changed files with 12 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
diis.h
View File

@ -54,7 +54,7 @@ public:
DIIS(const int n, const bool core=1);
void setup(const int n, const bool core=1);
~DIIS();
typename LA_traits<U>::normtype extrapolate(T &vec, const U &errvec, bool verbose=false, const Un diiseps=0); //vec is input/output; returns square residual norm
typename LA_traits<U>::normtype extrapolate(T &vec, U &errvec, bool verbose=false, const Un diiseps=0, bool errvecout=false); //vec is input/output, errvec optionally too; returns square residual norm
};
template<typename T, typename U>
@ -94,7 +94,7 @@ if(errstor) delete[] errstor;
template<typename T, typename U>
typename LA_traits<U>::normtype DIIS<T,U>::extrapolate(T &vec, const U &errvec, bool verbose, const Un diiseps)
typename LA_traits<U>::normtype DIIS<T,U>::extrapolate(T &vec, U &errvec, bool verbose, const Un diiseps, bool errvecout)
{
if(!dim) laerror("attempt to extrapolate from uninitialized DIIS");
//if dim exceeded, shift
@ -156,16 +156,26 @@ if(verbose) std::cout <<"DIIS coefficients: "<<rhs<<std::endl;
//build the new linear combination
vec.clear();
if(errvecout) errvec.clear();
if(incore)
for(int i=1; i<=aktdim; ++i)
{
vec.axpy(rhs[i],stor[(i-1+cyclicshift)%dim]);
if(errvecout) errvec.axpy(rhs[i],errstor[(i-1+cyclicshift)%dim]);
}
else
{
T tmp=vec; //copy dimensions
T errtmp; if(errvecout) errtmp=errvec;
for(int i=1; i<=aktdim; ++i)
{
st->get(tmp,(i-1+cyclicshift)%dim);
vec.axpy(rhs[i],tmp);
if(errvecout)
{
errst->get(errtmp,(i-1+cyclicshift)%dim);
errvec.axpy(rhs[i],errtmp);
}
}
}