cart-elc

Source code for CART-ELC
git clone git://git.laack.co/cart-elc.git
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redux.cpp (8239B)


      1 // This file is part of Eigen, a lightweight C++ template library
      2 // for linear algebra.
      3 //
      4 // Copyright (C) 2008 Benoit Jacob <jacob.benoit.1@gmail.com>
      5 // Copyright (C) 2015 Gael Guennebaud <gael.guennebaud@inria.fr>
      6 //
      7 // This Source Code Form is subject to the terms of the Mozilla
      8 // Public License v. 2.0. If a copy of the MPL was not distributed
      9 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
     10 
     11 #define TEST_ENABLE_TEMPORARY_TRACKING
     12 #define EIGEN_CACHEFRIENDLY_PRODUCT_THRESHOLD 8
     13 // ^^ see bug 1449
     14 
     15 #include "main.h"
     16 
     17 template<typename MatrixType> void matrixRedux(const MatrixType& m)
     18 {
     19   typedef typename MatrixType::Scalar Scalar;
     20   typedef typename MatrixType::RealScalar RealScalar;
     21 
     22   Index rows = m.rows();
     23   Index cols = m.cols();
     24 
     25   MatrixType m1 = MatrixType::Random(rows, cols);
     26 
     27   // The entries of m1 are uniformly distributed in [0,1], so m1.prod() is very small. This may lead to test
     28   // failures if we underflow into denormals. Thus, we scale so that entries are close to 1.
     29   MatrixType m1_for_prod = MatrixType::Ones(rows, cols) + RealScalar(0.2) * m1;
     30 
     31   Matrix<Scalar, MatrixType::RowsAtCompileTime, MatrixType::RowsAtCompileTime> m2(rows,rows);
     32   m2.setRandom();
     33 
     34   VERIFY_IS_MUCH_SMALLER_THAN(MatrixType::Zero(rows, cols).sum(), Scalar(1));
     35   VERIFY_IS_APPROX(MatrixType::Ones(rows, cols).sum(), Scalar(float(rows*cols))); // the float() here to shut up excessive MSVC warning about int->complex conversion being lossy
     36   Scalar s(0), p(1), minc(numext::real(m1.coeff(0))), maxc(numext::real(m1.coeff(0)));
     37   for(int j = 0; j < cols; j++)
     38   for(int i = 0; i < rows; i++)
     39   {
     40     s += m1(i,j);
     41     p *= m1_for_prod(i,j);
     42     minc = (std::min)(numext::real(minc), numext::real(m1(i,j)));
     43     maxc = (std::max)(numext::real(maxc), numext::real(m1(i,j)));
     44   }
     45   const Scalar mean = s/Scalar(RealScalar(rows*cols));
     46 
     47   VERIFY_IS_APPROX(m1.sum(), s);
     48   VERIFY_IS_APPROX(m1.mean(), mean);
     49   VERIFY_IS_APPROX(m1_for_prod.prod(), p);
     50   VERIFY_IS_APPROX(m1.real().minCoeff(), numext::real(minc));
     51   VERIFY_IS_APPROX(m1.real().maxCoeff(), numext::real(maxc));
     52   
     53   // test that partial reduction works if nested expressions is forced to evaluate early
     54   VERIFY_IS_APPROX((m1.matrix() * m1.matrix().transpose())       .cwiseProduct(m2.matrix()).rowwise().sum().sum(), 
     55                    (m1.matrix() * m1.matrix().transpose()).eval().cwiseProduct(m2.matrix()).rowwise().sum().sum());
     56 
     57   // test slice vectorization assuming assign is ok
     58   Index r0 = internal::random<Index>(0,rows-1);
     59   Index c0 = internal::random<Index>(0,cols-1);
     60   Index r1 = internal::random<Index>(r0+1,rows)-r0;
     61   Index c1 = internal::random<Index>(c0+1,cols)-c0;
     62   VERIFY_IS_APPROX(m1.block(r0,c0,r1,c1).sum(), m1.block(r0,c0,r1,c1).eval().sum());
     63   VERIFY_IS_APPROX(m1.block(r0,c0,r1,c1).mean(), m1.block(r0,c0,r1,c1).eval().mean());
     64   VERIFY_IS_APPROX(m1_for_prod.block(r0,c0,r1,c1).prod(), m1_for_prod.block(r0,c0,r1,c1).eval().prod());
     65   VERIFY_IS_APPROX(m1.block(r0,c0,r1,c1).real().minCoeff(), m1.block(r0,c0,r1,c1).real().eval().minCoeff());
     66   VERIFY_IS_APPROX(m1.block(r0,c0,r1,c1).real().maxCoeff(), m1.block(r0,c0,r1,c1).real().eval().maxCoeff());
     67 
     68   // regression for bug 1090
     69   const int R1 = MatrixType::RowsAtCompileTime>=2 ? MatrixType::RowsAtCompileTime/2 : 6;
     70   const int C1 = MatrixType::ColsAtCompileTime>=2 ? MatrixType::ColsAtCompileTime/2 : 6;
     71   if(R1<=rows-r0 && C1<=cols-c0)
     72   {
     73     VERIFY_IS_APPROX( (m1.template block<R1,C1>(r0,c0).sum()), m1.block(r0,c0,R1,C1).sum() );
     74   }
     75   
     76   // test empty objects
     77   VERIFY_IS_APPROX(m1.block(r0,c0,0,0).sum(),   Scalar(0));
     78   VERIFY_IS_APPROX(m1.block(r0,c0,0,0).prod(),  Scalar(1));
     79 
     80   // test nesting complex expression
     81   VERIFY_EVALUATION_COUNT( (m1.matrix()*m1.matrix().transpose()).sum(), (MatrixType::IsVectorAtCompileTime && MatrixType::SizeAtCompileTime!=1 ? 0 : 1) );
     82   VERIFY_EVALUATION_COUNT( ((m1.matrix()*m1.matrix().transpose())+m2).sum(),(MatrixType::IsVectorAtCompileTime && MatrixType::SizeAtCompileTime!=1 ? 0 : 1));
     83 }
     84 
     85 template<typename VectorType> void vectorRedux(const VectorType& w)
     86 {
     87   using std::abs;
     88   typedef typename VectorType::Scalar Scalar;
     89   typedef typename NumTraits<Scalar>::Real RealScalar;
     90   Index size = w.size();
     91 
     92   VectorType v = VectorType::Random(size);
     93   VectorType v_for_prod = VectorType::Ones(size) + Scalar(0.2) * v; // see comment above declaration of m1_for_prod
     94 
     95   for(int i = 1; i < size; i++)
     96   {
     97     Scalar s(0), p(1);
     98     RealScalar minc(numext::real(v.coeff(0))), maxc(numext::real(v.coeff(0)));
     99     for(int j = 0; j < i; j++)
    100     {
    101       s += v[j];
    102       p *= v_for_prod[j];
    103       minc = (std::min)(minc, numext::real(v[j]));
    104       maxc = (std::max)(maxc, numext::real(v[j]));
    105     }
    106     VERIFY_IS_MUCH_SMALLER_THAN(abs(s - v.head(i).sum()), Scalar(1));
    107     VERIFY_IS_APPROX(p, v_for_prod.head(i).prod());
    108     VERIFY_IS_APPROX(minc, v.real().head(i).minCoeff());
    109     VERIFY_IS_APPROX(maxc, v.real().head(i).maxCoeff());
    110   }
    111 
    112   for(int i = 0; i < size-1; i++)
    113   {
    114     Scalar s(0), p(1);
    115     RealScalar minc(numext::real(v.coeff(i))), maxc(numext::real(v.coeff(i)));
    116     for(int j = i; j < size; j++)
    117     {
    118       s += v[j];
    119       p *= v_for_prod[j];
    120       minc = (std::min)(minc, numext::real(v[j]));
    121       maxc = (std::max)(maxc, numext::real(v[j]));
    122     }
    123     VERIFY_IS_MUCH_SMALLER_THAN(abs(s - v.tail(size-i).sum()), Scalar(1));
    124     VERIFY_IS_APPROX(p, v_for_prod.tail(size-i).prod());
    125     VERIFY_IS_APPROX(minc, v.real().tail(size-i).minCoeff());
    126     VERIFY_IS_APPROX(maxc, v.real().tail(size-i).maxCoeff());
    127   }
    128 
    129   for(int i = 0; i < size/2; i++)
    130   {
    131     Scalar s(0), p(1);
    132     RealScalar minc(numext::real(v.coeff(i))), maxc(numext::real(v.coeff(i)));
    133     for(int j = i; j < size-i; j++)
    134     {
    135       s += v[j];
    136       p *= v_for_prod[j];
    137       minc = (std::min)(minc, numext::real(v[j]));
    138       maxc = (std::max)(maxc, numext::real(v[j]));
    139     }
    140     VERIFY_IS_MUCH_SMALLER_THAN(abs(s - v.segment(i, size-2*i).sum()), Scalar(1));
    141     VERIFY_IS_APPROX(p, v_for_prod.segment(i, size-2*i).prod());
    142     VERIFY_IS_APPROX(minc, v.real().segment(i, size-2*i).minCoeff());
    143     VERIFY_IS_APPROX(maxc, v.real().segment(i, size-2*i).maxCoeff());
    144   }
    145   
    146   // test empty objects
    147   VERIFY_IS_APPROX(v.head(0).sum(),   Scalar(0));
    148   VERIFY_IS_APPROX(v.tail(0).prod(),  Scalar(1));
    149   VERIFY_RAISES_ASSERT(v.head(0).mean());
    150   VERIFY_RAISES_ASSERT(v.head(0).minCoeff());
    151   VERIFY_RAISES_ASSERT(v.head(0).maxCoeff());
    152 }
    153 
    154 EIGEN_DECLARE_TEST(redux)
    155 {
    156   // the max size cannot be too large, otherwise reduxion operations obviously generate large errors.
    157   int maxsize = (std::min)(100,EIGEN_TEST_MAX_SIZE);
    158   TEST_SET_BUT_UNUSED_VARIABLE(maxsize);
    159   for(int i = 0; i < g_repeat; i++) {
    160     CALL_SUBTEST_1( matrixRedux(Matrix<float, 1, 1>()) );
    161     CALL_SUBTEST_1( matrixRedux(Array<float, 1, 1>()) );
    162     CALL_SUBTEST_2( matrixRedux(Matrix2f()) );
    163     CALL_SUBTEST_2( matrixRedux(Array2f()) );
    164     CALL_SUBTEST_2( matrixRedux(Array22f()) );
    165     CALL_SUBTEST_3( matrixRedux(Matrix4d()) );
    166     CALL_SUBTEST_3( matrixRedux(Array4d()) );
    167     CALL_SUBTEST_3( matrixRedux(Array44d()) );
    168     CALL_SUBTEST_4( matrixRedux(MatrixXcf(internal::random<int>(1,maxsize), internal::random<int>(1,maxsize))) );
    169     CALL_SUBTEST_4( matrixRedux(ArrayXXcf(internal::random<int>(1,maxsize), internal::random<int>(1,maxsize))) );
    170     CALL_SUBTEST_5( matrixRedux(MatrixXd (internal::random<int>(1,maxsize), internal::random<int>(1,maxsize))) );
    171     CALL_SUBTEST_5( matrixRedux(ArrayXXd (internal::random<int>(1,maxsize), internal::random<int>(1,maxsize))) );
    172     CALL_SUBTEST_6( matrixRedux(MatrixXi (internal::random<int>(1,maxsize), internal::random<int>(1,maxsize))) );
    173     CALL_SUBTEST_6( matrixRedux(ArrayXXi (internal::random<int>(1,maxsize), internal::random<int>(1,maxsize))) );
    174   }
    175   for(int i = 0; i < g_repeat; i++) {
    176     CALL_SUBTEST_7( vectorRedux(Vector4f()) );
    177     CALL_SUBTEST_7( vectorRedux(Array4f()) );
    178     CALL_SUBTEST_5( vectorRedux(VectorXd(internal::random<int>(1,maxsize))) );
    179     CALL_SUBTEST_5( vectorRedux(ArrayXd(internal::random<int>(1,maxsize))) );
    180     CALL_SUBTEST_8( vectorRedux(VectorXf(internal::random<int>(1,maxsize))) );
    181     CALL_SUBTEST_8( vectorRedux(ArrayXf(internal::random<int>(1,maxsize))) );
    182   }
    183 }