variables

Functions

affine

inline void ioh::problem::transformation::variables::affine(std::vector<double> &x, const std::vector<std::vector<double>> &m, const std::vector<double> &b)

Affine transformation for x using matrix M and vector B.

Parameters:

• x – raw variables

• m – transformation matrix

• b – transformation vector

asymmetric

inline void ioh::problem::transformation::variables::asymmetric(std::vector<double> &x, const double beta)

Asymmetric transformation scaled by beta.

Parameters:

• x – raw variables

• beta – scale of the transformation

brs

inline void ioh::problem::transformation::variables::brs(std::vector<double> &x)

brs transformation on x

Parameters:

x – raw variables

conditioning

inline void ioh::problem::transformation::variables::conditioning(std::vector<double> &x, const double alpha)

conditioning transformation of x

Parameters:

• x – raw variables

• alpha – base of the transformation

oscillate

inline void ioh::problem::transformation::variables::oscillate(std::vector<double> &x, const double alpha = 0.1)

oscillate each variable in x

Parameters:

• x – raw variables

• alpha – the factor of oscillation

random_flip

inline void ioh::problem::transformation::variables::random_flip(std::vector<int> &x, const int seed)

randomly flips a bit

Parameters:

• x – raw variables

• seed – seed for the random flip

random_reorder

inline void ioh::problem::transformation::variables::random_reorder(std::vector<int> &x, const int seed)

randomly reorder the elements from x

Parameters:

• x – raw variables

• seed – seed for the random flip

random_reorder_reset

inline std::vector<int> ioh::problem::transformation::variables::random_reorder_reset(const std::vector<int> &x_1, const int seed)

reset x from x_1 whose elements were randomly reordered from x

Parameters:

• x_1 – the reordered variables

• seed – seed for the random flip

random_sign_flip

inline void ioh::problem::transformation::variables::random_sign_flip(std::vector<double> &x, const long seed)

randomly reverse the sign for each xi

Parameters:

• x – raw variables

• seed – for generating the random vector

scale

inline void ioh::problem::transformation::variables::scale(std::vector<double> &x, const double scalar)

scale x by a scalar

Parameters:

• x – raw variables

• scalar – the factor to scale x by

subtract

inline void ioh::problem::transformation::variables::subtract(std::vector<double> &x, const std::vector<double> &offset)

subtract an offset from each xi

Parameters:

• x – raw variables

• offset – a vector of offsets for each xi

z_hat

inline void ioh::problem::transformation::variables::z_hat(std::vector<double> &x, const std::vector<double> &xopt)

transforms the raw variables using the distance to the optimum

Parameters:

• x – the raw variables

• xopt – the optimum