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+// SPDX-License-Identifier: Apache-2.0
+//
+// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
+// Copyright 2008-2016 National ICT Australia (NICTA)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// ------------------------------------------------------------------------
+
+
+//! \addtogroup spop_mean
+//! @{
+
+
+//! Class for finding mean values of a sparse matrix
+class spop_mean
+ : public traits_op_xvec
+ {
+ public:
+
+ // Apply mean into an output sparse matrix (or vector).
+ template<typename T1>
+ inline static void apply(SpMat<typename T1::elem_type>& out, const SpOp<T1, spop_mean>& in);
+
+ template<typename T1>
+ inline static void apply_noalias_fast(SpMat<typename T1::elem_type>& out, const SpProxy<T1>& p, const uword dim);
+
+ template<typename T1>
+ inline static void apply_noalias_slow(SpMat<typename T1::elem_type>& out, const SpProxy<T1>& p, const uword dim);
+
+ // Take direct mean of a set of values. Length of array and number of values can be different.
+ template<typename eT>
+ inline static eT direct_mean(const eT* const X, const uword length, const uword N);
+
+ template<typename eT>
+ inline static eT direct_mean_robust(const eT* const X, const uword length, const uword N);
+
+ template<typename T1>
+ inline static typename T1::elem_type mean_all(const SpBase<typename T1::elem_type, T1>& X);
+
+ template<typename T1, typename spop_type>
+ inline static typename T1::elem_type mean_all(const SpOp<T1, spop_type>& expr);
+
+ // Take the mean using an iterator.
+ template<typename T1, typename eT>
+ inline static eT iterator_mean(T1& it, const T1& end, const uword n_zero, const eT junk);
+
+ template<typename T1, typename eT>
+ inline static eT iterator_mean_robust(T1& it, const T1& end, const uword n_zero, const eT junk);
+ };
+
+
+
+//! @}