comparison armadillo-2.4.4/include/armadillo_bits/fn_stddev.hpp @ 0:8b6102e2a9b0

Armadillo Library

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