diff armadillo-2.4.4/include/armadillo_bits/fn_median.hpp @ 0:8b6102e2a9b0

Armadillo Library

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/armadillo-2.4.4/include/armadillo_bits/fn_median.hpp	Wed Apr 11 09:27:06 2012 +0100
@@ -0,0 +1,231 @@
+// 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_median
+//! @{
+
+
+template<typename T1>
+arma_inline
+const Op<T1, op_median>
+median(const Base<typename T1::elem_type,T1>& X, const uword dim = 0)
+  {
+  arma_extra_debug_sigprint();
+  
+  return Op<T1, op_median>(X.get_ref(), dim, 0);
+  }
+
+
+
+//! Immediate 'find the median value of a row vector' operation
+template<typename eT>
+inline
+arma_warn_unused
+eT
+median(const Row<eT>& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword A_n_elem = A.n_elem;
+  
+  arma_debug_check( (A_n_elem == 0), "median(): given object has no elements" );
+  
+  return op_median::direct_median(A.mem, A_n_elem);
+  }
+
+
+
+//! Immediate 'find the median value of a column vector' operation
+template<typename eT>
+inline
+arma_warn_unused
+eT
+median(const Col<eT>& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword A_n_elem = A.n_elem;
+  
+  arma_debug_check( (A_n_elem == 0), "median(): given object has no elements" );
+  
+  return op_median::direct_median(A.mem, A_n_elem);
+  }
+
+
+
+//! Immediate 'find the median value of a row vector' operation (complex number version)
+template<typename T>
+inline
+arma_warn_unused
+std::complex<T>
+median(const Row< std::complex<T> >& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword A_n_elem = A.n_elem;
+  
+  arma_debug_check( (A_n_elem == 0), "median(): given object has no elements" );
+  
+  uword index1;
+  uword index2;
+  op_median::direct_cx_median_index(index1, index2, A.mem, A_n_elem);
+  
+  return (index1 == index2) ? A.mem[index1] : op_median::robust_mean( A.mem[index1], A.mem[index2] );
+  }
+
+
+
+//! Immediate 'find the median value of a column vector' operation (complex number version)
+template<typename T>
+inline
+arma_warn_unused
+std::complex<T>
+median(const Col< std::complex<T> >& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword A_n_elem = A.n_elem;
+  
+  arma_debug_check( (A_n_elem == 0), "median(): given object has no elements" );
+  
+  uword index1;
+  uword index2;
+  op_median::direct_cx_median_index(index1, index2, A.mem, A_n_elem);
+  
+  return (index1 == index2) ? A.mem[index1] : op_median::robust_mean( A.mem[index1], A.mem[index2] );
+  }
+
+
+
+//! find the median value of a subview_row
+template<typename eT>
+inline
+arma_warn_unused
+eT
+median(const subview_row<eT>& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( (A.n_elem == 0), "median(): given object has no elements" );
+  
+  return op_median::direct_median(A);
+  }
+
+
+
+//! find the median value of a subview_col
+template<typename eT>
+inline
+arma_warn_unused
+eT
+median(const subview_col<eT>& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( (A.n_elem == 0), "median(): given object has no elements" );
+  
+  return op_median::direct_median(A.colptr(0), A.n_rows);
+  }
+
+
+
+//! find the median value of a subview_row (complex number version)
+template<typename T>
+inline
+arma_warn_unused
+std::complex<T>
+median(const subview_row< std::complex<T> >& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( (A.n_elem == 0), "median(): given object has no elements" );
+  
+  uword index1;
+  uword index2;
+  op_median::direct_cx_median_index(index1, index2, A);
+  
+  return (index1 == index2) ? A[index1] : op_median::robust_mean(A[index1], A[index2]);
+  }
+
+
+
+//! find the median value of a subview_col (complex number version)
+template<typename T>
+inline
+arma_warn_unused
+std::complex<T>
+median(const subview_col< std::complex<T> >& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( (A.n_elem == 0), "median(): given object has no elements" );
+  
+  uword index1;
+  uword index2;
+  op_median::direct_cx_median_index(index1, index2, A);
+  
+  return (index1 == index2) ? A[index1] : op_median::robust_mean(A[index1], A[index2]);
+  }
+
+
+
+template<typename eT>
+inline
+arma_warn_unused
+eT
+median(const diagview<eT>& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( (A.n_elem == 0), "median(): given object has no elements" );
+  
+  return op_median::direct_median(A);
+  }
+
+
+
+template<typename T>
+inline
+arma_warn_unused
+std::complex<T>
+median(const diagview< std::complex<T> >& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( (A.n_elem == 0), "median(): given object has no elements" );
+  
+  uword index1;
+  uword index2;
+  op_median::direct_cx_median_index(index1, index2, A);
+  
+  return (index1 == index2) ? A[index1] : op_median::robust_mean(A[index1], A[index2]);
+  }
+
+
+
+template<typename eT, typename T1>
+inline
+arma_warn_unused
+eT
+median(const subview_elem1<eT,T1>& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  const Col<eT> X(A);
+  
+  return median(X);
+  }
+
+
+
+//! @}