Utility.h File Reference

Utility functions for FlexNN — CSV, one-hot, and deterministic splits. More...

#include <cstdint>
#include <string>
#include <vector>
#include <Eigen/Dense>

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Namespaces
namespace	FlexNN
	Namespace for the FlexNN neural network library.

Functions
Eigen::MatrixXd	FlexNN::oneHotEncode (const Eigen::VectorXd &Y, int num_classes)
	One-hot encodes a vector of class labels.
void	FlexNN::readCSV_XY (const std::string &filename, Eigen::MatrixXd &X, Eigen::VectorXd &Y)
	Reads a CSV where first column is label, rest are features.
void	FlexNN::setRandomSeed (uint32_t seed)
	Set the global RNG seed for splitXY (deterministic splits).
uint32_t	FlexNN::getRandomSeed () noexcept
	Get the current global RNG seed.
std::vector< std::pair< Eigen::MatrixXd, Eigen::VectorXd > >	FlexNN::splitXY (const Eigen::MatrixXd &X, const Eigen::VectorXd &Y, const std::vector< double > &proportions)
	Splits dataset into multiple sets by proportions (uses global seed).
std::vector< std::pair< Eigen::MatrixXd, Eigen::VectorXd > >	FlexNN::splitXY (const Eigen::MatrixXd &X, const Eigen::VectorXd &Y, const std::vector< double > &proportions, uint32_t seed)
	Splits dataset with explicit seed (deterministic, no global state).

Detailed Description

Utility functions for FlexNN — CSV, one-hot, and deterministic splits.

Adds setRandomSeed/getRandomSeed so splitXY is deterministic when a seed is set, while keeping the old splitXY(X,Y,props) signature for backward compat (uses the global seed). See LLD_FLEXNN §8.