max@0: // Copyright (C) 2009-2011 NICTA (www.nicta.com.au)
max@0: // Copyright (C) 2009-2011 Conrad Sanderson
max@0: // 
max@0: // This file is part of the Armadillo C++ library.
max@0: // It is provided without any warranty of fitness
max@0: // for any purpose. You can redistribute this file
max@0: // and/or modify it under the terms of the GNU
max@0: // Lesser General Public License (LGPL) as published
max@0: // by the Free Software Foundation, either version 3
max@0: // of the License or (at your option) any later version.
max@0: // (see http://www.opensource.org/licenses for more info)
max@0: 
max@0: 
max@0: //! \addtogroup fn_stddev
max@0: //! @{
max@0: 
max@0: 
max@0: 
max@0: template<typename T1>
max@0: inline
max@0: const mtOp<typename T1::pod_type, T1, op_stddev>
max@0: stddev(const Base<typename T1::elem_type,T1>& X, const uword norm_type = 0, const uword dim = 0)
max@0:   {
max@0:   arma_extra_debug_sigprint();
max@0:   
max@0:   return mtOp<typename T1::pod_type, T1, op_stddev>(X.get_ref(), norm_type, dim);
max@0:   }
max@0: 
max@0: 
max@0: 
max@0: //! Immediate 'find the standard deviation of a row vector' operation
max@0: template<typename eT>
max@0: inline
max@0: arma_warn_unused
max@0: typename get_pod_type<eT>::result
max@0: stddev(const Row<eT>& A, const uword norm_type = 0)
max@0:   {
max@0:   arma_extra_debug_sigprint();
max@0:   
max@0:   const uword A_n_elem = A.n_elem;
max@0:   
max@0:   arma_debug_check( (A_n_elem == 0), "stddev(): given object has no elements" );
max@0:   
max@0:   return std::sqrt( op_var::direct_var(A.mem, A_n_elem, norm_type) );
max@0:   }
max@0: 
max@0: 
max@0: 
max@0: //! Immediate 'find the standard deviation of a column vector' operation
max@0: template<typename eT>
max@0: inline
max@0: arma_warn_unused
max@0: typename get_pod_type<eT>::result
max@0: stddev(const Col<eT>& A, const uword norm_type = 0)
max@0:   {
max@0:   arma_extra_debug_sigprint();
max@0:   
max@0:   const uword A_n_elem = A.n_elem;
max@0:   
max@0:   arma_debug_check( (A_n_elem == 0), "stddev(): given object has no elements" );
max@0:   
max@0:   return std::sqrt( op_var::direct_var(A.mem, A_n_elem, norm_type) );
max@0:   }
max@0: 
max@0: 
max@0: 
max@0: //! find the standard deviation of a subview_row
max@0: template<typename eT>
max@0: inline
max@0: arma_warn_unused
max@0: typename get_pod_type<eT>::result
max@0: stddev(const subview_row<eT>& A, const uword norm_type = 0)
max@0:   {
max@0:   arma_extra_debug_sigprint();
max@0:   
max@0:   arma_debug_check( (A.n_elem == 0), "stddev(): given object has no elements" );
max@0:   
max@0:   return std::sqrt( op_var::direct_var(A, norm_type) );
max@0:   }
max@0: 
max@0: 
max@0: 
max@0: //! find the standard deviation of a subview_col
max@0: template<typename eT>
max@0: inline
max@0: arma_warn_unused
max@0: typename get_pod_type<eT>::result
max@0: stddev(const subview_col<eT>& A, const uword norm_type = 0)
max@0:   {
max@0:   arma_extra_debug_sigprint();
max@0:   
max@0:   arma_debug_check( (A.n_elem == 0), "stddev(): given object has no elements" );
max@0:   
max@0:   return std::sqrt( op_var::direct_var(A.colptr(0), A.n_rows, norm_type) );
max@0:   }
max@0: 
max@0: 
max@0: 
max@0: //! find the standard deviation of a diagview
max@0: template<typename eT>
max@0: inline
max@0: arma_warn_unused
max@0: typename get_pod_type<eT>::result
max@0: stddev(const diagview<eT>& A, const uword norm_type = 0)
max@0:   {
max@0:   arma_extra_debug_sigprint();
max@0:   
max@0:   arma_debug_check( (A.n_elem == 0), "stddev(): given object has no elements" );
max@0:   
max@0:   return std::sqrt( op_var::direct_var(A, norm_type) );
max@0:   }
max@0: 
max@0: 
max@0: 
max@0: template<typename eT, typename T1>
max@0: inline
max@0: arma_warn_unused
max@0: typename get_pod_type<eT>::result
max@0: stddev(const subview_elem1<eT,T1>& A, const uword norm_type = 0)
max@0:   {
max@0:   arma_extra_debug_sigprint();
max@0:   
max@0:   const Col<eT> X(A);
max@0:   
max@0:   return stddev(X, norm_type);
max@0:   }
max@0: 
max@0: 
max@0: 
max@0: //! @}