inline float energy(CpxNumVec& m)
{
float val=0;
cpx* data = m.data();
for(int i=0; i<m.m(); i++) { //val += data[i].re*data[i].re + data[i].im*data[i].im;
val += norm(data[i]);
}
return val;
}
//Y <- a M X + b Y
// ----------------------------------------------------------------------
int zgemv(cpx alpha, const CpxNumMat& A, const CpxNumVec& X, cpx beta, CpxNumVec& Y)
{
assert(Y.m() == A.m());
assert(A.n() == X.m());
char trans = 'N';
int m = A.m(); int n = A.n();
int incx = 1; int incy = 1;
zgemv_(&trans, &m, &n, &alpha, A.data(), &m, X.data(), &incx, &beta, Y.data(), &incy);
return 0;
}