InverseFrequencyIdf

tfidf::idf

Struct InverseFrequencyIdf 

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pub struct InverseFrequencyIdf;
Expand description

Inverse frequency weighting scheme for IDF. Computes log (N / nt) where N is the number of documents, and nt is the number of times a term appears in the corpus of documents.

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impl Clone for InverseFrequencyIdf

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fn clone(&self) -> InverseFrequencyIdf

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl SmoothingFactor for InverseFrequencyIdf

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fn factor() -> f64

Returns a smoothing factor.
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impl Copy for InverseFrequencyIdf

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impl InverseFrequencySmoothedIdfStrategy for InverseFrequencyIdf

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<S, T> Idf<T> for S
where S: InverseFrequencySmoothedIdfStrategy, T: NaiveDocument,

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fn idf<'a, I, K>(term: K, docs: I) -> f64
where I: Iterator<Item = &'a T>, K: Borrow<<T as Document>::Term>, T: 'a,

Returns the weighted or unweighted inverse document frequency (idf) for a single term within a corpus of documents.
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.