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annotate armadillo-2.4.4/include/armadillo_bits/fn_sum.hpp @ 18:8d046a9d36aa slimline

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Back out rev 13:ac07c60aa798. Like an idiot, I committed a whole pile of unrelated changes in the guise of a single typo fix. Will re-commit in stages
author Chris Cannam
date Thu, 10 May 2012 10:45:44 +0100
parents 8b6102e2a9b0
children
rev   line source
max@0 1 // Copyright (C) 2008-2010 NICTA (www.nicta.com.au)
max@0 2 // Copyright (C) 2008-2010 Conrad Sanderson
max@0 3 //
max@0 4 // This file is part of the Armadillo C++ library.
max@0 5 // It is provided without any warranty of fitness
max@0 6 // for any purpose. You can redistribute this file
max@0 7 // and/or modify it under the terms of the GNU
max@0 8 // Lesser General Public License (LGPL) as published
max@0 9 // by the Free Software Foundation, either version 3
max@0 10 // of the License or (at your option) any later version.
max@0 11 // (see http://www.opensource.org/licenses for more info)
max@0 12
max@0 13
max@0 14 //! \addtogroup fn_sum
max@0 15 //! @{
max@0 16
max@0 17
max@0 18 //! \brief
max@0 19 //! Delayed sum of elements of a matrix along a specified dimension (either rows or columns).
max@0 20 //! The result is stored in a dense matrix that has either one column or one row.
max@0 21 //! For dim = 0, find the sum of each column.
max@0 22 //! For dim = 1, find the sum of each row.
max@0 23 //! The default is dim = 0.
max@0 24 //! NOTE: this function works differently than in Matlab/Octave.
max@0 25
max@0 26 template<typename T1>
max@0 27 arma_inline
max@0 28 const Op<T1, op_sum>
max@0 29 sum(const Base<typename T1::elem_type,T1>& X, const uword dim = 0)
max@0 30 {
max@0 31 arma_extra_debug_sigprint();
max@0 32
max@0 33 return Op<T1, op_sum>(X.get_ref(), dim, 0);
max@0 34 }
max@0 35
max@0 36
max@0 37 //! \brief
max@0 38 //! Immediate 'sum all values' operation for a row vector
max@0 39 template<typename eT>
max@0 40 inline
max@0 41 arma_warn_unused
max@0 42 eT
max@0 43 sum(const Row<eT>& X)
max@0 44 {
max@0 45 arma_extra_debug_sigprint();
max@0 46
max@0 47 return accu(X);
max@0 48 }
max@0 49
max@0 50
max@0 51
max@0 52 //! \brief
max@0 53 //! Immediate 'sum all values' operation for a column vector
max@0 54 template<typename eT>
max@0 55 inline
max@0 56 arma_warn_unused
max@0 57 eT
max@0 58 sum(const Col<eT>& X)
max@0 59 {
max@0 60 arma_extra_debug_sigprint();
max@0 61
max@0 62 return accu(X);
max@0 63 }
max@0 64
max@0 65
max@0 66
max@0 67 //! \brief
max@0 68 //! Immediate 'sum all values' operation,
max@0 69 //! invoked, for example, by: sum(sum(A))
max@0 70
max@0 71 template<typename T1>
max@0 72 inline
max@0 73 arma_warn_unused
max@0 74 typename T1::elem_type
max@0 75 sum(const Op<T1, op_sum>& in)
max@0 76 {
max@0 77 arma_extra_debug_sigprint();
max@0 78 arma_extra_debug_print("sum(): two consecutive sum() calls detected");
max@0 79
max@0 80 return accu(in.m);
max@0 81 }
max@0 82
max@0 83
max@0 84
max@0 85 template<typename T1>
max@0 86 arma_inline
max@0 87 const Op<Op<T1, op_sum>, op_sum>
max@0 88 sum(const Op<T1, op_sum>& in, const uword dim)
max@0 89 {
max@0 90 arma_extra_debug_sigprint();
max@0 91
max@0 92 return Op<Op<T1, op_sum>, op_sum>(in, dim, 0);
max@0 93 }
max@0 94
max@0 95
max@0 96
max@0 97 //! sum all values of a subview_row
max@0 98 template<typename eT>
max@0 99 inline
max@0 100 arma_warn_unused
max@0 101 eT
max@0 102 sum(const subview_row<eT>& X)
max@0 103 {
max@0 104 arma_extra_debug_sigprint();
max@0 105
max@0 106 return accu(X);
max@0 107 }
max@0 108
max@0 109
max@0 110
max@0 111 //! sum all values of a subview_col
max@0 112 template<typename eT>
max@0 113 inline
max@0 114 arma_warn_unused
max@0 115 eT
max@0 116 sum(const subview_col<eT>& X)
max@0 117 {
max@0 118 arma_extra_debug_sigprint();
max@0 119
max@0 120 return accu(X);
max@0 121 }
max@0 122
max@0 123
max@0 124
max@0 125 //! sum all values of a diagview
max@0 126 template<typename eT>
max@0 127 inline
max@0 128 arma_warn_unused
max@0 129 eT
max@0 130 sum(const diagview<eT>& X)
max@0 131 {
max@0 132 arma_extra_debug_sigprint();
max@0 133
max@0 134 return accu(X);
max@0 135 }
max@0 136
max@0 137
max@0 138
max@0 139 template<typename eT, typename T1>
max@0 140 inline
max@0 141 arma_warn_unused
max@0 142 eT
max@0 143 sum(const subview_elem1<eT,T1>& A)
max@0 144 {
max@0 145 arma_extra_debug_sigprint();
max@0 146
max@0 147 return accu(A);
max@0 148 }
max@0 149
max@0 150
max@0 151
max@0 152 //! @}