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1 // Copyright (C) 2012 Ryan Curtin
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2 // Copyright (C) 2012 Conrad Sanderson
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3 //
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4 // This Source Code Form is subject to the terms of the Mozilla Public
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5 // License, v. 2.0. If a copy of the MPL was not distributed with this
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6 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
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7
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8
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9 //! \addtogroup spop_mean
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10 //! @{
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11
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12
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13 //! Class for finding mean values of a sparse matrix
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14 class spop_mean
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15 {
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16 public:
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17
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18 // Apply mean into an output sparse matrix (or vector).
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19 template<typename T1>
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20 inline static void apply(SpMat<typename T1::elem_type>& out, const SpOp<T1, spop_mean>& in);
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21
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22 template<typename T1>
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23 inline static void apply_noalias(SpMat<typename T1::elem_type>& out, const SpProxy<T1>& p, const uword dim);
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24
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25 // Take direct mean of a set of values. Length of array and number of values can be different.
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26 template<typename eT>
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27 inline static eT direct_mean(const eT* const X, const uword length, const uword N);
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28
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29 template<typename eT>
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30 inline static eT direct_mean_robust(const eT* const X, const uword length, const uword N);
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31
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32 template<typename T1>
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33 inline static typename T1::elem_type mean_all(const SpBase<typename T1::elem_type, T1>& X);
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34
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35 // Take the mean using an iterator.
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36 template<typename T1, typename eT>
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37 inline static eT iterator_mean(T1& it, const T1& end, const uword n_zero, const eT junk);
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38
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39 template<typename T1, typename eT>
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40 inline static eT iterator_mean_robust(T1& it, const T1& end, const uword n_zero, const eT junk);
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41 };
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42
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43
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44
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45 //! @}
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