keystoneml.nodes.learning

KernelTransformer

trait KernelTransformer[T] extends AnyRef

Base trait for functions that transform the given input data with respect to a pre-specified kernel function.

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GaussianKernelTransformer
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  1. abstract def apply(data: T): DenseVector[Double]

    Perform a kernel transformation on a single element.

    Perform a kernel transformation on a single element.

    data

    input data to compute kernel on.

    returns

    a dense vector containing the transformed data.

  2. abstract def apply(data: RDD[T]): KernelMatrix

    Perform kernel transformation of a given dataset.

    Perform kernel transformation of a given dataset. If the kernel function is \phi, this computes \phi(x, y) for all rows in the given dataset.

    data

    input data to compute kernel on.

    returns

    a kernel matrix containing the output of the transformation

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