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negloglik

Negative loglikelihood of probability distribution

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Syntax

nll = negloglik(pd)

Description

nll = negloglik(pd) returns the value of the negative loglikelihood function for the data used to fit the probability distribution pd.

example

Examples

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Open Live Script

Load the sample data. 

load carsmall

Create a Weibull distribution object by fitting it to the mile per gallon (MPG) data. 

pd = fitdist(MPG,'Weibull')
pd = 
  WeibullDistribution

  Weibull distribution
    A = 26.5079   [24.8333, 28.2954]
    B = 3.27193   [2.79441, 3.83104]

Compute the negative log likelihood for the fitted Weibull distribution. 

wnll = negloglik(pd)
wnll = 
327.4942
Open Live Script

Load the sample data. Fit a kernel distribution to the miles per gallon (MPG) data. 

load carsmall;
pd = fitdist(MPG,'Kernel')
pd = 
  KernelDistribution

    Kernel = normal
    Bandwidth = 4.11428
    Support = unbounded

Compute the negative loglikelihood. 

nll = negloglik(pd)
nll = 
327.3139

Input Arguments

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Output Arguments

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Negative loglikelihood value for the data used to fit the distribution, returned as a numeric value.

Extended Capabilities

Version History

Introduced in R2013a

See Also

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