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armadillo-code/include/armadillo_bits/fn_stddev.hpp
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2025-06-11 21:45:30 +10:00

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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 fn_stddev
//! @{
template<typename T1>
arma_warn_unused
inline
typename
enable_if2
<
is_arma_type<T1>::value && resolves_to_vector<T1>::yes,
typename T1::pod_type
>::result
stddev(const T1& X, const uword norm_type = 0)
{
arma_debug_sigprint();
return op_stddev::stddev_vec(X, norm_type);
}
template<typename T1, int omit_mode>
arma_warn_unused
inline
typename
enable_if2
<
is_arma_type<T1>::value && resolves_to_vector<T1>::yes,
typename T1::pod_type
>::result
stddev(const T1& X, const uword norm_type, const elem_opts::omit_indicator<omit_mode>& indicator)
{
arma_debug_sigprint();
return op_stddev_omit::stddev_vec(X, norm_type, indicator);
}
template<typename T1>
arma_warn_unused
inline
typename
enable_if2
<
is_arma_type<T1>::value && resolves_to_vector<T1>::no,
const mtOp<typename T1::pod_type, T1, op_stddev>
>::result
stddev(const T1& X, const uword norm_type = 0)
{
arma_debug_sigprint();
return mtOp<typename T1::pod_type, T1, op_stddev>(X, norm_type, 0);
}
template<typename T1>
arma_warn_unused
inline
typename
enable_if2
<
is_arma_type<T1>::value,
const mtOp<typename T1::pod_type, T1, op_stddev>
>::result
stddev(const T1& X, const uword norm_type, const uword dim)
{
arma_debug_sigprint();
return mtOp<typename T1::pod_type, T1, op_stddev>(X, norm_type, dim);
}
template<typename T1, int omit_mode>
arma_warn_unused
inline
typename
enable_if2
<
is_arma_type<T1>::value,
const mtOp<typename T1::pod_type, T1, op_stddev_omit>
>::result
stddev(const T1& X, const uword norm_type, const uword dim, const elem_opts::omit_indicator<omit_mode>&)
{
arma_debug_sigprint();
arma_conform_check( (norm_type > 1), "stddev(): parameter 'norm_type' must be 0 or 1" );
arma_conform_check( (dim > 1), "stddev(): parameter 'dim' must be 0 or 1" );
uword omit_mode_and_dim = 0;
if( (omit_mode == 1) && (dim == 0) ) { omit_mode_and_dim = 10; }
if( (omit_mode == 1) && (dim == 1) ) { omit_mode_and_dim = 11; }
if( (omit_mode == 2) && (dim == 0) ) { omit_mode_and_dim = 20; }
if( (omit_mode == 2) && (dim == 1) ) { omit_mode_and_dim = 21; }
return mtOp<typename T1::pod_type, T1, op_stddev_omit>(X, norm_type, omit_mode_and_dim);
}
template<typename T>
arma_warn_unused
inline
typename arma_scalar_only<T>::result
stddev(const T&)
{
return T(0);
}
template<typename T1>
arma_warn_unused
inline
typename
enable_if2
<
is_arma_sparse_type<T1>::value && resolves_to_sparse_vector<T1>::yes,
typename T1::pod_type
>::result
stddev(const T1& X, const uword norm_type = 0)
{
arma_debug_sigprint();
return op_sp_stddev::stddev_vec(X, norm_type);
}
template<typename T1>
arma_warn_unused
inline
typename
enable_if2
<
is_arma_sparse_type<T1>::value && resolves_to_sparse_vector<T1>::no,
const mtSpReduceOp<typename T1::pod_type, T1, op_sp_stddev>
>::result
stddev(const T1& X, const uword norm_type = 0)
{
arma_debug_sigprint();
return mtSpReduceOp<typename T1::pod_type, T1, op_sp_stddev>(X, norm_type, 0);
}
template<typename T1>
arma_warn_unused
inline
typename
enable_if2
<
is_arma_sparse_type<T1>::value,
const mtSpReduceOp<typename T1::pod_type, T1, op_sp_stddev>
>::result
stddev(const T1& X, const uword norm_type, const uword dim)
{
arma_debug_sigprint();
return mtSpReduceOp<typename T1::pod_type, T1, op_sp_stddev>(X, norm_type, dim);
}
//! @}