Utility.cpp File Reference

Implements FlexNN utilities with deterministic seeding. More...

#include "Utility.h"
#include <algorithm>
#include <atomic>
#include <cstdint>
#include <fstream>
#include <numeric>
#include <random>
#include <sstream>
#include <string>
#include <vector>
#include <Eigen/Dense>

Include dependency graph for Utility.cpp:

Namespaces
namespace	FlexNN
	Namespace for the FlexNN neural network library.

Functions
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.
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.
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

Implements FlexNN utilities with deterministic seeding.

Why this file: splitXY was nondeterministic (random_device per call) which broke test hermeticity. Now setRandomSeed + thread_local mt19937 makes it deterministic when needed, while keeping the old signature for backward compat (see LLD_FLEXNN §8).