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