object FeatureRotator extends Serializable
Utilities to compute and apply rotations.
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- def applyOneRotation(input: Vector[Any], featuresToRotate: IndexedSeq[Int], trans: DenseMatrix[Double]): Vector[Any]
Apply rotation to a vector.
Apply rotation to a vector.
- input
vector to rotate
- featuresToRotate
vector of feature indices included in rotation
- trans
linear transformation matrix to apply
- returns
rotated vectors
- def applyRotation(input: Seq[Vector[Any]], featuresToRotate: IndexedSeq[Int], trans: DenseMatrix[Double]): Seq[Vector[Any]]
Apply rotation to a sequence of vectors.
Apply rotation to a sequence of vectors.
- input
sequence of vectors to rotate
- featuresToRotate
vector of feature indices included in rotation
- trans
linear transformation matrix to apply
- returns
sequence of rotated vectors
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- def getDoubleFeatures(rep: Vector[Any]): IndexedSeq[Int]
Get list of feature indices that make sense to rotate.
Get list of feature indices that make sense to rotate.
- rep
representative vector of features
- returns
list of feature indices that are doubles
- def getRandomRotation(dimension: Int): DenseMatrix[Double]
Draw a random unitary matrix from the uniform (Haar) measure.
Draw a random unitary matrix from the uniform (Haar) measure.
- dimension
for which to get a rotator
- returns
unitary matrix
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