120 lines
3.7 KiB
C++
120 lines
3.7 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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struct gmm_dist_mode { const uword id; inline constexpr explicit gmm_dist_mode(const uword in_id) : id(in_id) {} };
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inline bool operator==(const gmm_dist_mode& a, const gmm_dist_mode& b) { return (a.id == b.id); }
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inline bool operator!=(const gmm_dist_mode& a, const gmm_dist_mode& b) { return (a.id != b.id); }
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struct gmm_dist_eucl : public gmm_dist_mode { inline constexpr gmm_dist_eucl() : gmm_dist_mode(1) {} };
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struct gmm_dist_maha : public gmm_dist_mode { inline constexpr gmm_dist_maha() : gmm_dist_mode(2) {} };
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struct gmm_dist_prob : public gmm_dist_mode { inline constexpr gmm_dist_prob() : gmm_dist_mode(3) {} };
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static constexpr gmm_dist_eucl eucl_dist;
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static constexpr gmm_dist_maha maha_dist;
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static constexpr gmm_dist_prob prob_dist;
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struct gmm_seed_mode { const uword id; inline constexpr explicit gmm_seed_mode(const uword in_id) : id(in_id) {} };
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inline bool operator==(const gmm_seed_mode& a, const gmm_seed_mode& b) { return (a.id == b.id); }
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inline bool operator!=(const gmm_seed_mode& a, const gmm_seed_mode& b) { return (a.id != b.id); }
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struct gmm_seed_keep_existing : public gmm_seed_mode { inline constexpr gmm_seed_keep_existing() : gmm_seed_mode(1) {} };
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struct gmm_seed_static_subset : public gmm_seed_mode { inline constexpr gmm_seed_static_subset() : gmm_seed_mode(2) {} };
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struct gmm_seed_static_spread : public gmm_seed_mode { inline constexpr gmm_seed_static_spread() : gmm_seed_mode(3) {} };
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struct gmm_seed_random_subset : public gmm_seed_mode { inline constexpr gmm_seed_random_subset() : gmm_seed_mode(4) {} };
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struct gmm_seed_random_spread : public gmm_seed_mode { inline constexpr gmm_seed_random_spread() : gmm_seed_mode(5) {} };
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static constexpr gmm_seed_keep_existing keep_existing;
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static constexpr gmm_seed_static_subset static_subset;
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static constexpr gmm_seed_static_spread static_spread;
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static constexpr gmm_seed_random_subset random_subset;
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static constexpr gmm_seed_random_spread random_spread;
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namespace gmm_priv
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{
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template<typename eT> class gmm_diag;
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template<typename eT> class gmm_full;
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struct gmm_empty_arg {};
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// running_mean_scalar
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template<typename eT>
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class running_mean_scalar
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{
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public:
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inline running_mean_scalar();
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inline running_mean_scalar(const running_mean_scalar& in_rms);
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inline const running_mean_scalar& operator=(const running_mean_scalar& in_rms);
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arma_hot inline void operator() (const eT X);
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inline void reset();
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inline uword count() const;
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inline eT mean() const;
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private:
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arma_aligned uword counter;
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arma_aligned eT r_mean;
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};
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// distance
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template<typename eT, uword dist_id>
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struct distance {};
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template<typename eT>
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struct distance<eT, uword(1)>
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{
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arma_inline static eT eval(const uword N, const eT* A, const eT* B, const eT*);
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};
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template<typename eT>
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struct distance<eT, uword(2)>
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{
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arma_inline static eT eval(const uword N, const eT* A, const eT* B, const eT* C);
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};
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}
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//! @}
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