193 lines
3.0 KiB
C++
193 lines
3.0 KiB
C++
// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
|
|
// Copyright 2008-2016 National ICT Australia (NICTA)
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
// ------------------------------------------------------------------------
|
|
|
|
|
|
//! \addtogroup gmm_misc
|
|
//! @{
|
|
|
|
|
|
namespace gmm_priv
|
|
{
|
|
|
|
|
|
template<typename eT>
|
|
inline
|
|
running_mean_scalar<eT>::running_mean_scalar()
|
|
: counter(uword(0))
|
|
, r_mean ( eT(0))
|
|
{
|
|
arma_extra_debug_sigprint_this(this);
|
|
}
|
|
|
|
|
|
|
|
template<typename eT>
|
|
inline
|
|
running_mean_scalar<eT>::running_mean_scalar(const running_mean_scalar<eT>& in)
|
|
: counter(in.counter)
|
|
, r_mean (in.r_mean )
|
|
{
|
|
arma_extra_debug_sigprint_this(this);
|
|
}
|
|
|
|
|
|
|
|
template<typename eT>
|
|
inline
|
|
const running_mean_scalar<eT>&
|
|
running_mean_scalar<eT>::operator=(const running_mean_scalar<eT>& in)
|
|
{
|
|
arma_extra_debug_sigprint();
|
|
|
|
counter = in.counter;
|
|
r_mean = in.r_mean;
|
|
|
|
return *this;
|
|
}
|
|
|
|
|
|
|
|
template<typename eT>
|
|
arma_hot
|
|
inline
|
|
void
|
|
running_mean_scalar<eT>::operator() (const eT X)
|
|
{
|
|
arma_extra_debug_sigprint();
|
|
|
|
counter++;
|
|
|
|
if(counter > 1)
|
|
{
|
|
const eT old_r_mean = r_mean;
|
|
|
|
r_mean = old_r_mean + (X - old_r_mean)/counter;
|
|
}
|
|
else
|
|
{
|
|
r_mean = X;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
template<typename eT>
|
|
inline
|
|
void
|
|
running_mean_scalar<eT>::reset()
|
|
{
|
|
arma_extra_debug_sigprint();
|
|
|
|
counter = 0;
|
|
r_mean = eT(0);
|
|
}
|
|
|
|
|
|
|
|
template<typename eT>
|
|
inline
|
|
uword
|
|
running_mean_scalar<eT>::count() const
|
|
{
|
|
return counter;
|
|
}
|
|
|
|
|
|
|
|
template<typename eT>
|
|
inline
|
|
eT
|
|
running_mean_scalar<eT>::mean() const
|
|
{
|
|
return r_mean;
|
|
}
|
|
|
|
|
|
|
|
//
|
|
//
|
|
//
|
|
|
|
|
|
|
|
template<typename eT>
|
|
arma_inline
|
|
eT
|
|
distance<eT, uword(1)>::eval(const uword N, const eT* A, const eT* B, const eT*)
|
|
{
|
|
eT acc1 = eT(0);
|
|
eT acc2 = eT(0);
|
|
|
|
uword i,j;
|
|
for(i=0, j=1; j<N; i+=2, j+=2)
|
|
{
|
|
eT tmp_i = A[i];
|
|
eT tmp_j = A[j];
|
|
|
|
tmp_i -= B[i];
|
|
tmp_j -= B[j];
|
|
|
|
acc1 += tmp_i*tmp_i;
|
|
acc2 += tmp_j*tmp_j;
|
|
}
|
|
|
|
if(i < N)
|
|
{
|
|
const eT tmp_i = A[i] - B[i];
|
|
|
|
acc1 += tmp_i*tmp_i;
|
|
}
|
|
|
|
return (acc1 + acc2);
|
|
}
|
|
|
|
|
|
|
|
template<typename eT>
|
|
arma_inline
|
|
eT
|
|
distance<eT, uword(2)>::eval(const uword N, const eT* A, const eT* B, const eT* C)
|
|
{
|
|
eT acc1 = eT(0);
|
|
eT acc2 = eT(0);
|
|
|
|
uword i,j;
|
|
for(i=0, j=1; j<N; i+=2, j+=2)
|
|
{
|
|
eT tmp_i = A[i];
|
|
eT tmp_j = A[j];
|
|
|
|
tmp_i -= B[i];
|
|
tmp_j -= B[j];
|
|
|
|
acc1 += (tmp_i*tmp_i) * C[i];
|
|
acc2 += (tmp_j*tmp_j) * C[j];
|
|
}
|
|
|
|
if(i < N)
|
|
{
|
|
const eT tmp_i = A[i] - B[i];
|
|
|
|
acc1 += (tmp_i*tmp_i) * C[i];
|
|
}
|
|
|
|
return (acc1 + acc2);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
//! @}
|