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This commit is contained in:
jiri 2016-06-28 13:07:54 +00:00
parent 8ed1014ddc
commit 360eb60a97
1 changed files with 84 additions and 11 deletions
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95
nonclass.cc
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@ -136,6 +136,7 @@ void lawritemat(FILE *file,const T *a,int r,int c,const char *form0,
static void linear_solve_do(NRMat<double> &A, double *B, const int nrhs, const int ldb, double *det, int n)
{
int r, *ipiv;
int iswap=0;
if (n==A.nrows() && A.nrows() != A.ncols()) laerror("linear_solve() call for non-square matrix");
@ -150,21 +151,21 @@ static void linear_solve_do(NRMat<double> &A, double *B, const int nrhs, const i
*det = 1.;
//take into account some numerical instabilities in dgesv for singular matrices
for (int i=0; i<n; ++i) {double t=A[i][i]; if(!finite(t) || std::abs(t) < EPSDET ) {*det=0.; break;} else *det *=t;}
//find out whether ipiv are numbered from 0 or from 1
int shift=1;
for (int i=0; i<n; ++i) if(ipiv[i]==0) shift=0;
//change sign of det by parity of ipiv permutation
if(*det) for (int i=0; i<n; ++i) if(
#ifdef NONCBLAS
i+1
#else
i
#endif
!=ipiv[i]) *det = -(*det);
if(*det) for (int i=0; i<n; ++i) if(i+shift != ipiv[i]) {*det = -(*det); ++iswap;}
}
if(det && r>0) *det = 0;
/*
std::cout <<"iswap = "<<iswap<<std::endl;
if(det && r>0) *det = 0;
std::cout <<"ipiv = ";
for (int i=0; i<n; ++i) std::cout <<ipiv[i]<<" ";
std::cout <<std::endl;
*/
delete [] ipiv;
if (r>0 && B) laerror("singular matrix in lapack_gesv");
}
@ -762,7 +763,7 @@ extern "C" void FORNAME(dgesvd)(const char *JOBU, const char *JOBVT, const FIN
double *VT, const FINT *LDVT, double *WORK, const FINT *LWORK, FINT *INFO );
void singular_decomposition(NRMat<double> &a, NRMat<double> *u, NRVec<double> &s,
NRMat<double> *v, const bool corder, int m, int n)
NRMat<double> *v, const bool vnotdagger, int m, int n)
{
FINT m0 = a.nrows();
FINT n0 = a.ncols();
@ -811,12 +812,84 @@ void singular_decomposition(NRMat<double> &a, NRMat<double> *u, NRVec<double> &s
#endif
delete[] work;
if (v && corder) v->transposeme(n);
if (v && vnotdagger) v->transposeme(n);
if (r < 0) laerror("illegal argument in gesvd() of singular_decomposition()");
if (r > 0) laerror("convergence problem in gesvd() of ingular_decomposition()");
if (r > 0) laerror("convergence problem in gesvd() of singular_decomposition()");
}
extern "C" void FORNAME(zgesvd)(const char *JOBU, const char *JOBVT, const FINT *M,
const FINT *N, complex<double> *A, const FINT *LDA, double *S, complex<double> *U, const FINT *LDU,
complex<double> *VT, const FINT *LDVT, complex<double> *WORK, const FINT *LWORK, double *RWORK, FINT *INFO );
void singular_decomposition(NRMat<complex<double> > &a, NRMat<complex<double> > *u, NRVec<double> &s,
NRMat<complex<double> > *v, const bool vnotdagger, int m, int n)
{
FINT m0 = a.nrows();
FINT n0 = a.ncols();
if(m<=0) m=(int)m0;
if(n<=0) n=(int)n0;
if(n>n0 || m>m0) laerror("bad dimension in singular_decomposition");
if (u) if (m > u->nrows() || m> u->ncols())
laerror("inconsistent dimension of U Mat in singular_decomposition()");
if (s.size() < m && s.size() < n)
laerror("inconsistent dimension of S Vec in singular_decomposition()");
if (v) if (n > v->nrows() || n > v->ncols())
laerror("inconsistent dimension of V Mat in singular_decomposition()");
int nmin = n<m?n:m;
a.copyonwrite();
s.copyonwrite();
if (u) u->copyonwrite();
if (v) v->copyonwrite();
// C-order (transposed) input and swap u,v matrices,
// v should be transposed at the end
char jobu = u ? 'A' : 'N';
char jobv = v ? 'A' : 'N';
complex<double> work0;
FINT lwork = -1;
FINT r;
double *rwork = new double[5*nmin];
#ifdef FORINT
FINT ntmp = n;
FINT mtmp = m;
FORNAME(zgesvd)(&jobv, &jobu, &ntmp, &mtmp, a, &n0, s, v?(*v)[0]:0, &n0,
u?(*u)[0]:0, &m0, &work0, &lwork, rwork, &r);
#else
FORNAME(zgesvd)(&jobv, &jobu, &n, &m, a, &n0, s, v?(*v)[0]:0, &n0,
u?(*u)[0]:0, &m0, &work0, &lwork, rwork, &r);
#endif
lwork = (FINT) work0.real();
complex<double> *work = new complex<double>[lwork];
#ifdef FORINT
FORNAME(zgesvd)(&jobv, &jobu, &ntmp, &mtmp, a, &n0, s, v?(*v)[0]:0, &n0,
u?(*u)[0]:0, &m0, work, &lwork, rwork, &r);
#else
FORNAME(zgesvd)(&jobv, &jobu, &n, &m, a, &n0, s, v?(*v)[0]:0, &n0,
u?(*u)[0]:0, &m0, work, &lwork, rwork, &r);
#endif
delete[] work;
delete[] rwork;
if (v && vnotdagger) {v->transposeme(n); v->conjugateme();}
if (r < 0) laerror("illegal argument in gesvd() of singular_decomposition()");
if (r > 0) laerror("convergence problem in gesvd() of singular_decomposition()");
}
//QR decomposition
//extern "C" void FORNAME(dgeqrf)(const int *M, const int *N, double *A, const int *LDA, double *TAU, double *WORK, int *LWORK, int *INFO);