logLik: Minus logLikelihood

In MobilePhoneESSnetBigData/destim: R package for mobile devices position estimation

Description

Returns the minus logarithm of the likelihood given a model and a set of observations.

A slightly modified version of the forward algorithm is used to compute the likelihood, to avoid store unneeded data. The sign is changed because it is usual to minimize instead maximize.

Usage

logLik(...)

## S3 method for class 'HMM'
logLik(x, e)

Arguments

x	A HMM model.
e	A vector with the observed events. It admits missing values.

Value

The minus logarithm of the likelihood of the events given the model.

See Also

fit, HMM, initparams

Examples

model <- HMMrectangle(20,20)
S <- function(x) if (x > 5) return(0) else return(20*log(5/x))
emissions(model) <- createEM(c(20,20), towers, S)
model <- initparams(model)
model <- minparams(model)
logLik(model,events)

MobilePhoneESSnetBigData/destim documentation built on Dec. 7, 2020, 7:35 p.m.