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// | |
// Created by chronum on 5/23/17. | |
// | |
#ifndef BLAZE_IDE_TEST_BLAZEGEN_HPP | |
#define BLAZE_IDE_TEST_BLAZEGEN_HPP | |
#include <blaze/Blaze.h> | |
#include <iomanip> | |
#include <random> | |
namespace bz=blaze; | |
namespace blazegen { | |
// Generates a uniform random matrix of type T using a (P)RNG | |
// of class Generator. | |
template<typename T, class Generator = std::mt19937> | |
bz::DynamicMatrix<T> randu_matrix_real(const unsigned long rows, | |
const unsigned long cols, Generator& g) { | |
bz::DynamicMatrix <T> rand_matrix(rows, cols); | |
std::uniform_real_distribution<T> distribution(0, 1); | |
for (auto row = 0; row < rows; ++row) { | |
for (auto col = 0; col < cols; ++col) { | |
rand_matrix(row, col) = distribution(g); | |
} | |
} | |
return rand_matrix; | |
} | |
// Generates a normal random matrix of type T using a (P)RNG | |
// of class Generator. | |
template<typename T, class Generator = std::mt19937> | |
bz::DynamicMatrix<T> randn_matrix_real(const unsigned long rows, | |
const unsigned long cols, | |
Generator& g, | |
double mu = 0.0, double sigma = 1.0) { | |
bz::DynamicMatrix <T> rand_matrix(rows, cols); | |
std::normal_distribution<T> distribution(mu, sigma); | |
for (auto row = 0; row < rows; ++row) { | |
for (auto col = 0; col < cols; ++col) { | |
rand_matrix(row, col) = distribution(g); | |
} | |
} | |
return rand_matrix; | |
} | |
// Generates a uniform random matrix of type T using a (P)RNG | |
// of class Generator. | |
template<typename T, class Generator = std::mt19937> | |
bz::DynamicVector<T> randu_vector_real(const unsigned long length, Generator& g) { | |
bz::DynamicVector <T> rand_vector(length); | |
std::uniform_real_distribution<T> distribution(0, 1); | |
for (auto element = 0; element < length; ++element) { | |
rand_vector[element] = distribution(g); | |
} | |
return rand_vector; | |
} | |
// Generates a normal random matrix of type T using a (P)RNG | |
// of class Generator. | |
template<typename T, class Generator = std::mt19937> | |
bz::DynamicVector<T> randn_vector_real(const unsigned long length, | |
Generator& g, | |
double mu = 0.0, double sigma = 1.0) { | |
bz::DynamicVector <T> rand_vector(length); | |
std::normal_distribution<T> distribution(mu, sigma); | |
for (auto element = 0; element < length; ++element) { | |
rand_vector[element] = distribution(g); | |
} | |
return rand_vector; | |
} | |
template <typename T> | |
void print_mat(T const& matrix){ | |
unsigned long rows = matrix.rows(), cols = matrix.columns(); | |
//std::cout << std::setw(10) << std::endl; | |
//std::cout << std::setprecision(6) << std::endl; | |
std::cout.width(10); | |
std::cout.precision(4); | |
std::cout.left; | |
std::cout.fixed; | |
for(auto i = 0UL; i < rows; ++i) { | |
for (auto j = 0UL; j < cols; ++j){ | |
std::cout << matrix(i, j) << '\t'; | |
} | |
std::cout << std::endl; | |
} | |
} | |
template <typename T> | |
bz::CompressedMatrix<T> laplacian_1d(const unsigned long mat_dim){ | |
bz::CompressedMatrix<T> result(mat_dim, mat_dim); | |
result.reserve(3*mat_dim-2); // A 2nd-order Laplacian has 3n-2 nonzeros. | |
// Inserting into first and last rows. | |
result.append(0, 0, 2); // diag. | |
result.append(0, 1, -1); //upper diag. | |
result.finalize(0); | |
result.append(mat_dim-1, mat_dim-1, 2); // diag. | |
result.append(mat_dim-1, mat_dim-2, -1); //lower diag. | |
result.finalize(mat_dim-1); | |
for(unsigned long i = 1; i < mat_dim-1; ++i){ | |
result.append(i, i-1, -1); // lower diag. | |
result.append(i, i, 2); // diag. | |
result.append(i, i+1, -1); //upper diag. | |
result.finalize(i); | |
} | |
return result; | |
} | |
} | |
#endif //BLAZE_IDE_TEST_BLAZEGEN_HPP |
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