CODEWITHSUNDEEP
pythonmachine-learningnlpnltk
alexizydorczyk
alexizydorczyk

Reputation: 920

Set_Weights in NLTK Maxent?

I'm wondering what the set_weights method of the Maxent class in NLTK is used for (or more specifically how to use it). As I understand, it allows you to manually assign weights to certain features? Could somebody provide a basic example of the type of parameter that would be passed into it?

Thanks Alex

Upvotes: 1

Views: 445

Answers (1)

Fred Foo
Fred Foo

Reputation: 363737

It apparently allows you to set the coefficient matrix of the classifier. This may be useful if you have an external MaxEnt/logistic regression learning package from which you can export the coefficients. The train_maxent_classifier_with_gis and train_maxent_classifier_with_iis learning algorithms call this function.

If you don't know what a coefficient matrix is; it's the β mentioned in Wikipedia's treatment of MaxEnt.

(To be honest, it looks like NLTK is either leaking implementation details here, or has a very poorly documented API.)

Upvotes: 2

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