Move into version control

1 files changed, 253 insertions, 0 deletions

diff --git a/src/armadillo/include/armadillo_bits/glue_hist_meat.hpp b/src/armadillo/include/armadillo_bits/glue_hist_meat.hpp
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index 0000000..ec5b4a3
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+++ b/src/armadillo/include/armadillo_bits/glue_hist_meat.hpp
@@ -0,0 +1,253 @@
+// 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 glue_hist
+//! @{
+
+
+template<typename eT>
+inline
+void
+glue_hist::apply_noalias(Mat<uword>& out, const Mat<eT>& X, const Mat<eT>& C, const uword dim)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( ((C.is_vec() == false) && (C.is_empty() == false)), "hist(): parameter 'centers' must be a vector" );
+  
+  const uword X_n_rows = X.n_rows;
+  const uword X_n_cols = X.n_cols;
+  
+  const uword C_n_elem = C.n_elem;
+  
+  if( C_n_elem == 0 )  { out.reset(); return; }
+  
+  arma_debug_check
+    (
+    ((Col<eT>(const_cast<eT*>(C.memptr()), C_n_elem, false, false)).is_sorted("strictascend") == false),
+    "hist(): given 'centers' vector does not contain monotonically increasing values"
+    );
+  
+  const eT* C_mem    = C.memptr();
+  const eT  center_0 = C_mem[0];
+  
+  if(dim == 0)
+    {
+    out.zeros(C_n_elem, X_n_cols);
+    
+    for(uword col=0; col < X_n_cols; ++col)
+      {
+      const eT*    X_coldata   = X.colptr(col);
+            uword* out_coldata = out.colptr(col);
+      
+      for(uword row=0; row < X_n_rows; ++row)
+        {
+        const eT val = X_coldata[row];
+        
+        if(arma_isfinite(val))
+          {
+          eT    opt_dist  = (center_0 >= val) ? (center_0 - val) : (val - center_0);
+          uword opt_index = 0;
+          
+          for(uword j=1; j < C_n_elem; ++j)
+            {
+            const eT center = C_mem[j];
+            const eT dist   = (center >= val) ? (center - val) : (val - center);
+            
+            if(dist < opt_dist)
+              {
+              opt_dist  = dist;
+              opt_index = j;
+              }
+            else
+              {
+              break;
+              }
+            }
+          
+          out_coldata[opt_index]++;
+          }
+        else
+          {
+          // -inf
+          if(val < eT(0)) { out_coldata[0]++; }
+          
+          // +inf
+          if(val > eT(0)) { out_coldata[C_n_elem-1]++; }
+          
+          // ignore NaN
+          }
+        }
+      }
+    }
+  else
+  if(dim == 1)
+    {
+    out.zeros(X_n_rows, C_n_elem);
+    
+    if(X_n_rows == 1)
+      {
+      const uword  X_n_elem = X.n_elem;
+      const eT*    X_mem    = X.memptr();
+            uword* out_mem  = out.memptr();
+      
+      for(uword i=0; i < X_n_elem; ++i)
+        {
+        const eT val = X_mem[i];
+        
+        if(is_finite(val))
+          {
+          eT    opt_dist  = (val >= center_0) ? (val - center_0) : (center_0 - val);
+          uword opt_index = 0;
+          
+          for(uword j=1; j < C_n_elem; ++j)
+            {
+            const eT center = C_mem[j];
+            const eT dist   = (val >= center) ? (val - center) : (center - val);
+            
+            if(dist < opt_dist)
+              {
+              opt_dist  = dist;
+              opt_index = j;
+              }
+            else
+              {
+              break;
+              }
+            }
+          
+          out_mem[opt_index]++;
+          }
+        else
+          {
+          // -inf
+          if(val < eT(0)) { out_mem[0]++; }
+          
+          // +inf
+          if(val > eT(0)) { out_mem[C_n_elem-1]++; }
+          
+          // ignore NaN
+          }
+        }
+      }
+    else
+      {
+      for(uword row=0; row < X_n_rows; ++row)
+        {
+        for(uword col=0; col < X_n_cols; ++col)
+          {
+          const eT val = X.at(row,col);
+          
+          if(arma_isfinite(val))
+            {
+            eT    opt_dist  = (center_0 >= val) ? (center_0 - val) : (val - center_0);
+            uword opt_index = 0;
+            
+            for(uword j=1; j < C_n_elem; ++j)
+              {
+              const eT center = C_mem[j];
+              const eT dist   = (center >= val) ? (center - val) : (val - center);
+              
+              if(dist < opt_dist)
+                {
+                opt_dist  = dist;
+                opt_index = j;
+                }
+              else
+                {
+                break;
+                }
+              }
+            
+            out.at(row,opt_index)++;
+            }
+          else
+            {
+            // -inf
+            if(val < eT(0)) { out.at(row,0)++; }
+            
+            // +inf
+            if(val > eT(0)) { out.at(row,C_n_elem-1)++; }
+            
+            // ignore NaN
+            }
+          }
+        }
+      }
+    }
+  }
+
+
+
+template<typename T1, typename T2>
+inline
+void
+glue_hist::apply(Mat<uword>& out, const mtGlue<uword,T1,T2,glue_hist>& expr)
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword dim = expr.aux_uword;
+  
+  arma_debug_check( (dim > 1), "hist(): parameter 'dim' must be 0 or 1" );
+  
+  const quasi_unwrap<T1> UA(expr.A);
+  const quasi_unwrap<T2> UB(expr.B);
+  
+  if(UA.is_alias(out) || UB.is_alias(out))
+    {
+    Mat<uword> tmp;
+    
+    glue_hist::apply_noalias(tmp, UA.M, UB.M, dim);
+    
+    out.steal_mem(tmp);
+    }
+  else
+    {
+    glue_hist::apply_noalias(out, UA.M, UB.M, dim);
+    }
+  }
+
+
+
+template<typename T1, typename T2>
+inline
+void
+glue_hist_default::apply(Mat<uword>& out, const mtGlue<uword,T1,T2,glue_hist_default>& expr)
+  {
+  arma_extra_debug_sigprint();
+  
+  const quasi_unwrap<T1> UA(expr.A);
+  const quasi_unwrap<T2> UB(expr.B);
+  
+  const uword dim = (T1::is_xvec) ? uword(UA.M.is_rowvec() ? 1 : 0) : uword((T1::is_row) ? 1 : 0);
+  
+  if(UA.is_alias(out) || UB.is_alias(out))
+    {
+    Mat<uword> tmp;
+    
+    glue_hist::apply_noalias(tmp, UA.M, UB.M, dim);
+    
+    out.steal_mem(tmp);
+    }
+  else
+    {
+    glue_hist::apply_noalias(out, UA.M, UB.M, dim);
+    }
+  }
+
+
+//! @}