Classes | Functions

Op_cor

//! More...

Classes

class  op_cor

Functions

template<typename eT >
static void op_cor::direct_cor (Mat< eT > &out, const Mat< eT > &X, const u32 norm_type)
template<typename T >
static void op_cor::direct_cor (Mat< std::complex< T > > &out, const Mat< std::complex< T > > &X, const u32 norm_type)
template<typename T1 >
static void op_cor::apply (Mat< typename T1::elem_type > &out, const Op< T1, op_cor > &in)

Detailed Description

//!


Function Documentation

template<typename eT >
void op_cor::direct_cor ( Mat< eT > &  out,
const Mat< eT > &  X,
const u32  norm_type 
) [inline, static, inherited]

Definition at line 27 of file op_cor_meat.hpp.

References Mat< eT >::is_vec(), Mat< eT >::n_rows, Mat< eT >::set_size(), stddev(), sum(), and trans().

Referenced by apply().

  {
  arma_extra_debug_sigprint();

  if(A.is_vec())
    {
    out.set_size(1,1);
    out[0] = eT(1);
    }
  else
    {
    const u32 N = A.n_rows;
    const eT norm_val = (norm_type == 0) ? ( (N > 1) ? eT(N-1) : eT(1) ) : eT(N);

    const Row<eT> acc = sum(A);
    const Row<eT> sd  = stddev(A);

    out = (trans(A) * A);
    out -= (trans(acc) * acc)/eT(N);
    out /= norm_val;
    out /= trans(sd) * sd;
    }
  }

template<typename T >
void op_cor::direct_cor ( Mat< std::complex< T > > &  out,
const Mat< std::complex< T > > &  X,
const u32  norm_type 
) [inline, static, inherited]

Definition at line 56 of file op_cor_meat.hpp.

References conj(), stddev(), sum(), and trans().

  {
  arma_extra_debug_sigprint();

  typedef typename std::complex<T> eT;

  if(A.is_vec())
    {
    out.set_size(1,1);
    out[0] = eT(1);
    }
  else
    {
    const u32 N = A.n_rows;
    const eT norm_val = (norm_type == 0) ? ( (N > 1) ? eT(N-1) : eT(1) ) : eT(N);

    const Row<eT> acc = sum(A);
    const Row<T>  sd  = stddev(A);

    out = trans(conj(A)) * A;
    out -= (trans(conj(acc)) * acc)/eT(N);
    out /= norm_val;

    //out = out / (trans(sd) * sd);
    out /= conv_to< Mat<eT> >::from(trans(sd) * sd);
    }
  }

template<typename T1 >
void op_cor::apply ( Mat< typename T1::elem_type > &  out,
const Op< T1, op_cor > &  in 
) [inline, static, inherited]

Definition at line 89 of file op_cor_meat.hpp.

References Op< T1, op_type >::aux_u32_a, direct_cor(), unwrap_check< T1 >::M, and Op< T1, op_type >::m.

  {
  arma_extra_debug_sigprint();
  
  typedef typename T1::elem_type eT;
  
  const unwrap_check<T1> tmp(in.m, out);
  const Mat<eT>& A     = tmp.M;
  
  const u32 norm_type = in.aux_u32_a;
  
  op_cor::direct_cor(out, A, norm_type);
  }