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jiri 2006-09-12 20:27:41 +00:00
parent b6e5dda896
commit 052df9b879
1 changed files with 22 additions and 0 deletions
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22
nonclass.h
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@ -233,4 +233,26 @@ return cblas_ddot(n,x,incx,y,incy);
}
//debugging aid: reconstruct an explicit matrix from the implicit version
//which provides gemv only
template<typename M, typename T>
NRMat<T> reconstructmatrix(const M &implicitmat)
{
NRMat<T> r(implicitmat.nrows(),implicitmat.ncols());
NRVec<T> rhs(0.,implicitmat.ncols());
NRVec<T> tmp(implicitmat.nrows());
for(int i=0; i<implicitmat.ncols(); ++i)
{
rhs[i]=1.;
implicitmat.gemv(0.,tmp,'n',1.,rhs);
for(int j=0; j<implicitmat.nrows(); ++j) r(j,i)=tmp[j];
rhs[i]=0.;
}
return r;
}
#endif