org.grouplens.lenskit.transform.normalize

Interface VectorTransformation

public interface VectorTransformation

Reversible in-place vector transformations.

Method Summary

Modifier and Type	Method and Description
MutableSparseVector	apply(MutableSparseVector vector) Apply the vector transformation in-place to a vector.
MutableSparseVector	unapply(MutableSparseVector vector) Unapply the vector transformation in-place on a transformed vector.

Method Detail

apply

MutableSparseVector apply(MutableSparseVector vector)

Apply the vector transformation in-place to a vector.

Parameters:

vector - The vector to transform.

Returns:

vector (for chaining).

unapply

MutableSparseVector unapply(MutableSparseVector vector)

Unapply the vector transformation in-place on a transformed vector. In some cases, the unapplication may supply values for key domain members that do not have values.

Parameters:

vector - The vector to transform.

Returns:

vector (for chaining).