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1 // Copyright (C) 2009-2011 NICTA (www.nicta.com.au)
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2 // Copyright (C) 2009-2011 Conrad Sanderson
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3 //
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4 // This file is part of the Armadillo C++ library.
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5 // It is provided without any warranty of fitness
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6 // for any purpose. You can redistribute this file
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7 // and/or modify it under the terms of the GNU
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8 // Lesser General Public License (LGPL) as published
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9 // by the Free Software Foundation, either version 3
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10 // of the License or (at your option) any later version.
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11 // (see http://www.opensource.org/licenses for more info)
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12
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13
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14 //! \addtogroup op_var
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15 //! @{
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16
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17
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18
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19 //! Class for finding variance values of a matrix
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20 class op_var
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21 {
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22 public:
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23
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24 template<typename eT>
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25 inline static eT direct_var(const eT* const X, const uword N, const uword norm_type = 0);
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26
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27 template<typename T>
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28 inline static T direct_var(const std::complex<T>* const X, const uword N, const uword norm_type = 0);
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29
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30
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31 template<typename eT>
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32 inline static typename get_pod_type<eT>::result direct_var(const subview_row<eT>& X, const uword norm_type = 0);
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33
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34 template<typename eT>
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35 inline static typename get_pod_type<eT>::result direct_var(const subview_col<eT>& X, const uword norm_type = 0);
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36
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37 template<typename eT>
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38 inline static typename get_pod_type<eT>::result direct_var(const diagview<eT>& X, const uword norm_type = 0);
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39
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40
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41 template<typename T1>
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42 inline static void apply(Mat<typename T1::pod_type>& out, const mtOp<typename T1::pod_type, T1, op_var>& in);
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43
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44
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45 template<typename eT>
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46 inline static eT direct_var_robust(const eT* const X, const uword N, const uword norm_type = 0);
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47
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48 template<typename T>
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49 inline static T direct_var_robust(const std::complex<T>* const X, const uword N, const uword norm_type = 0);
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50 };
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51
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52
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53
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54 //! @}
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