static coco_problem_t *f_weierstrass_bbob_problem_allocate(const size_t function,
const size_t dimension,
const size_t instance,
const long rseed,
const char *problem_id_template,
const char *problem_name_template) {
double *xopt, fopt;
coco_problem_t *problem = NULL;
size_t i, j, k;
double *M = coco_allocate_vector(dimension * dimension);
double *b = coco_allocate_vector(dimension);
double *current_row, **rot1, **rot2;
const double condition = 100.0;
const double penalty_factor = 10.0 / (double) dimension;
xopt = coco_allocate_vector(dimension);
fopt = bbob2009_compute_fopt(function, instance);
bbob2009_compute_xopt(xopt, rseed, dimension);
rot1 = bbob2009_allocate_matrix(dimension, dimension);
rot2 = bbob2009_allocate_matrix(dimension, dimension);
bbob2009_compute_rotation(rot1, rseed + 1000000, dimension);
bbob2009_compute_rotation(rot2, rseed, dimension);
for (i = 0; i < dimension; ++i) {
b[i] = 0.0;
current_row = M + i * dimension;
for (j = 0; j < dimension; ++j) {
current_row[j] = 0.0;
for (k = 0; k < dimension; ++k) {
const double base = 1.0 / sqrt(condition);
const double exponent = 1.0 * (int) k / ((double) (long) dimension - 1.0);
current_row[j] += rot1[i][k] * pow(base, exponent) * rot2[k][j];
}
}
}
problem = f_weierstrass_allocate(dimension);
problem = f_transform_obj_shift(problem, fopt);
problem = f_transform_vars_affine(problem, M, b, dimension);
problem = f_transform_vars_oscillate(problem);
bbob2009_copy_rotation_matrix(rot1, M, b, dimension);
problem = f_transform_vars_affine(problem, M, b, dimension);
problem = f_transform_vars_shift(problem, xopt, 0);
problem = f_transform_obj_penalize(problem, penalty_factor);
bbob2009_free_matrix(rot1, dimension);
bbob2009_free_matrix(rot2, dimension);
coco_problem_set_id(problem, problem_id_template, function, instance, dimension);
coco_problem_set_name(problem, problem_name_template, function, instance, dimension);
coco_problem_set_type(problem, "4-multi-modal");
coco_free_memory(M);
coco_free_memory(b);
coco_free_memory(xopt);
return problem;
}
/**
* @brief Creates the BBOB Griewank-Rosenbrock problem.
*/
static coco_problem_t *f_griewank_rosenbrock_bbob_problem_allocate(const size_t function,
const size_t dimension,
const size_t instance,
const long rseed,
const char *problem_id_template,
const char *problem_name_template) {
double fopt;
coco_problem_t *problem = NULL;
size_t i, j;
double *M = coco_allocate_vector(dimension * dimension);
double *b = coco_allocate_vector(dimension);
double *shift = coco_allocate_vector(dimension);
double scales, **rot1;
fopt = bbob2009_compute_fopt(function, instance);
for (i = 0; i < dimension; ++i) {
shift[i] = -0.5;
}
rot1 = bbob2009_allocate_matrix(dimension, dimension);
bbob2009_compute_rotation(rot1, rseed, dimension);
scales = coco_double_max(1., sqrt((double) dimension) / 8.);
for (i = 0; i < dimension; ++i) {
for (j = 0; j < dimension; ++j) {
rot1[i][j] *= scales;
}
}
problem = f_griewank_rosenbrock_allocate(dimension);
problem = transform_obj_shift(problem, fopt);
problem = transform_vars_shift(problem, shift, 0);
bbob2009_copy_rotation_matrix(rot1, M, b, dimension);
problem = transform_vars_affine(problem, M, b, dimension);
bbob2009_free_matrix(rot1, dimension);
coco_problem_set_id(problem, problem_id_template, function, instance, dimension);
coco_problem_set_name(problem, problem_name_template, function, instance, dimension);
coco_problem_set_type(problem, "4-multi-modal");
coco_free_memory(M);
coco_free_memory(b);
coco_free_memory(shift);
return problem;
}
