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

Armadillo Library

+// Copyright (C) 2010 NICTA (www.nicta.com.au)
+// Copyright (C) 2010 Conrad Sanderson
+// Copyright (C) 2010 Dimitrios Bouzas
+// 
+// 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 op_find
+//! @{
+
+
+
+template<typename T1>
+inline
+uword
+op_find::helper
+  (
+  Mat<uword>& indices,
+  const Base<typename T1::elem_type, T1>& X
+  )
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type      eT;
+  typedef typename Proxy<T1>::ea_type ea_type;
+  
+  const Proxy<T1> A(X.get_ref());
+  
+  ea_type   PA     = A.get_ea();
+  const uword n_elem = A.get_n_elem();
+  
+  indices.set_size(n_elem, 1);
+  
+  uword* indices_mem = indices.memptr();
+  uword  n_nz        = 0;
+  
+  for(uword i=0; i<n_elem; ++i)
+    {
+    if(PA[i] != eT(0))
+      {
+      indices_mem[n_nz] = i;
+      ++n_nz;
+      }
+    }
+   
+  return n_nz;
+  }
+
+
+
+template<typename T1, typename op_type>
+inline
+uword
+op_find::helper
+  (
+  Mat<uword>& indices,
+  const mtOp<uword, T1, op_type>& X,
+  const typename arma_op_rel_only<op_type>::result           junk1,
+  const typename arma_not_cx<typename T1::elem_type>::result junk2
+  )
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk1);
+  arma_ignore(junk2);
+  
+  typedef typename T1::elem_type      eT;
+  typedef typename Proxy<T1>::ea_type ea_type;
+  
+  const eT val = X.aux;
+  
+  const Proxy<T1> A(X.m);
+  
+  ea_type   PA     = A.get_ea();
+  const uword n_elem = A.get_n_elem();
+  
+  indices.set_size(n_elem, 1);
+  
+  uword* indices_mem = indices.memptr();
+  uword  n_nz        = 0;
+  
+  for(uword i=0; i<n_elem; ++i)
+    {
+    const eT tmp = PA[i];
+    
+    bool not_zero;
+    
+         if(is_same_type<op_type, op_rel_lt_pre   >::value == true)  { not_zero = (val <  tmp); }
+    else if(is_same_type<op_type, op_rel_lt_post  >::value == true)  { not_zero = (tmp <  val); }
+    else if(is_same_type<op_type, op_rel_gt_pre   >::value == true)  { not_zero = (val >  tmp); }
+    else if(is_same_type<op_type, op_rel_gt_post  >::value == true)  { not_zero = (tmp >  val); }
+    else if(is_same_type<op_type, op_rel_lteq_pre >::value == true)  { not_zero = (val <= tmp); }
+    else if(is_same_type<op_type, op_rel_lteq_post>::value == true)  { not_zero = (tmp <= val); }
+    else if(is_same_type<op_type, op_rel_gteq_pre >::value == true)  { not_zero = (val >= tmp); }
+    else if(is_same_type<op_type, op_rel_gteq_post>::value == true)  { not_zero = (tmp >= val); }
+    else if(is_same_type<op_type, op_rel_eq       >::value == true)  { not_zero = (tmp == val); }
+    else if(is_same_type<op_type, op_rel_noteq    >::value == true)  { not_zero = (tmp != val); }
+    else not_zero = false;
+    
+    if(not_zero == true)
+      {
+      indices_mem[n_nz] = i;
+      ++n_nz;
+      }
+    }
+  
+  return n_nz;
+  }
+
+
+
+template<typename T1, typename op_type>
+inline
+uword
+op_find::helper
+  (
+  Mat<uword>& indices,
+  const mtOp<uword, T1, op_type>& X,
+  const typename arma_op_rel_only<op_type>::result            junk1,
+  const typename arma_cx_only<typename T1::elem_type>::result junk2
+  )
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk1);
+  arma_ignore(junk2);
+  
+  typedef typename T1::elem_type      eT;
+  typedef typename Proxy<T1>::ea_type ea_type;
+  
+  const eT val = X.aux;
+  
+  const Proxy<T1> A(X.m);
+  
+  ea_type   PA     = A.get_ea();
+  const uword n_elem = A.get_n_elem();
+  
+  indices.set_size(n_elem, 1);
+  
+  uword* indices_mem = indices.memptr();
+  uword  n_nz        = 0;
+  
+  for(uword i=0; i<n_elem; ++i)
+    {
+    const eT tmp = PA[i];
+    
+    bool not_zero;
+    
+         if(is_same_type<op_type, op_rel_eq   >::value == true)  { not_zero = (tmp == val); }
+    else if(is_same_type<op_type, op_rel_noteq>::value == true)  { not_zero = (tmp != val); }
+    else not_zero = false;
+    
+    if(not_zero == true)
+      {
+      indices_mem[n_nz] = i;
+      ++n_nz;
+      }
+    }
+  
+  return n_nz;
+  }
+
+
+
+template<typename T1, typename T2, typename glue_type>
+inline
+uword
+op_find::helper
+  (
+  Mat<uword>& indices,
+  const mtGlue<uword, T1, T2, glue_type>& X,
+  const typename arma_glue_rel_only<glue_type>::result       junk1,
+  const typename arma_not_cx<typename T1::elem_type>::result junk2,
+  const typename arma_not_cx<typename T2::elem_type>::result junk3
+  )
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk1);
+  arma_ignore(junk2);
+  arma_ignore(junk3);
+  
+  typedef typename T1::elem_type eT1;
+  typedef typename T2::elem_type eT2;
+  
+  typedef typename Proxy<T1>::ea_type ea_type1;
+  typedef typename Proxy<T2>::ea_type ea_type2;
+  
+  const Proxy<T1> A(X.A);
+  const Proxy<T2> B(X.B);
+  
+  arma_debug_assert_same_size(A, B, "relational operator");
+  
+  ea_type1  PA     = A.get_ea();
+  ea_type2  PB     = B.get_ea();
+  const uword n_elem = B.get_n_elem();
+  
+  indices.set_size(n_elem, 1);
+  
+  uword* indices_mem = indices.memptr();
+  uword  n_nz        = 0;
+  
+  for(uword i=0; i<n_elem; ++i)
+    {
+    const eT1 tmp1 = PA[i];
+    const eT2 tmp2 = PB[i];
+    
+    bool not_zero;
+    
+         if(is_same_type<glue_type, glue_rel_lt    >::value == true)  { not_zero = (tmp1 <  tmp2); }
+    else if(is_same_type<glue_type, glue_rel_gt    >::value == true)  { not_zero = (tmp1 >  tmp2); }
+    else if(is_same_type<glue_type, glue_rel_lteq  >::value == true)  { not_zero = (tmp1 <= tmp2); }
+    else if(is_same_type<glue_type, glue_rel_gteq  >::value == true)  { not_zero = (tmp1 >= tmp2); }
+    else if(is_same_type<glue_type, glue_rel_eq    >::value == true)  { not_zero = (tmp1 == tmp2); }
+    else if(is_same_type<glue_type, glue_rel_noteq >::value == true)  { not_zero = (tmp1 != tmp2); }
+    else not_zero = false;
+    
+    if(not_zero == true)
+      {
+      indices_mem[n_nz] = i;
+      ++n_nz;
+      }
+    }
+  
+  return n_nz;
+  }
+
+
+
+template<typename T1, typename T2, typename glue_type>
+inline
+uword
+op_find::helper
+  (
+  Mat<uword>& indices,
+  const mtGlue<uword, T1, T2, glue_type>& X,
+  const typename arma_glue_rel_only<glue_type>::result        junk1,
+  const typename arma_cx_only<typename T1::elem_type>::result junk2,
+  const typename arma_cx_only<typename T2::elem_type>::result junk3
+  )
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk1);
+  arma_ignore(junk2);
+  arma_ignore(junk3);
+  
+  typedef typename Proxy<T1>::ea_type ea_type1;
+  typedef typename Proxy<T2>::ea_type ea_type2;
+  
+  const Proxy<T1> A(X.A);
+  const Proxy<T2> B(X.B);
+  
+  arma_debug_assert_same_size(A, B, "relational operator");
+  
+  ea_type1  PA     = A.get_ea();
+  ea_type2  PB     = B.get_ea();
+  const uword n_elem = B.get_n_elem();
+  
+  indices.set_size(n_elem, 1);
+  
+  uword* indices_mem = indices.memptr();
+  uword  n_nz        = 0;
+  
+  for(uword i=0; i<n_elem; ++i)
+    {
+    bool not_zero;
+    
+         if(is_same_type<glue_type, glue_rel_eq    >::value == true)  { not_zero = (PA[i] == PB[i]); }
+    else if(is_same_type<glue_type, glue_rel_noteq >::value == true)  { not_zero = (PA[i] != PB[i]); }
+    else not_zero = false;
+    
+    if(not_zero == true)
+      {
+      indices_mem[n_nz] = i;
+      ++n_nz;
+      }
+    }
+  
+  return n_nz;
+  }
+
+
+
+template<typename T1>
+inline
+void
+op_find::apply(Mat<uword>& out, const mtOp<uword, T1, op_find>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword k    = X.aux_uword_a;
+  const uword type = X.aux_uword_b;
+  
+  Mat<uword> indices;
+  const uword n_nz = op_find::helper(indices, X.m);
+  
+  if(n_nz > 0)
+    {
+    if(type == 0)   // "first"
+      {
+      out = (k > 0 && k <= n_nz) ? indices.rows(0,      k-1   ) : indices.rows(0, n_nz-1);
+      }
+    else   // "last"
+      {
+      out = (k > 0 && k <= n_nz) ? indices.rows(n_nz-k, n_nz-1) : indices.rows(0, n_nz-1);
+      }
+    }
+  else
+    {
+    out.reset();
+    }
+  }
+
+
+
+//! @}