hmm_vec.cpp File Reference

core functions for hmm, construction and decoding More...

#include <hmm.h>

Functions
double	logE (double val)
	adds small constant before taking the logarithm, to avoid log(0) error More...
int *	viterbi (HMMv const &hmm, std::vector< int > observed, const int n)
	Uses the viterbi algorithm to estimate the most-likely state sequence. More...
void	setWarning (char *strin)
	Simple macro to print to cout. More...

Detailed Description

core functions for hmm, construction and decoding

Constructs HMM object as well as performs viterbi decoding

Author

Adam Willats. based on viterbi.cpp by Feder1co 5oave: https://gist.github.com/Feder1co5oave/2347228

Date

2019-2021

Function Documentation

logE()

double logE

(

double

val

)

adds small constant before taking the logarithm, to avoid log(0) error

Parameters

val	input value

Returns

log(val + small epsilon)

setWarning()

void setWarning

(

char *

strin

)

Simple macro to print to cout.

Parameters

strin

string to be printed

Note

mostly for debugging, could be removed

viterbi()

int* viterbi	(	HMMv const &	hmm,
		std::vector< int >	observed,
		const int	n
	)

Uses the viterbi algorithm to estimate the most-likely state sequence.

Parameters

hmm	object containing parameters of the HMM
observed	vector of ints representing the obeserved signal
n	time-length of the input signal

Returns

vector of most-likely states