Source code for our Paper "Learning in High-Dimensional Feature Spaces Using ANOVA-Based Matrix-Vector Multiplication"

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Deep Learning NFFT4ANOVA
Overview

NFFT4ANOVA

Source code for our Paper "Learning in High-Dimensional Feature Spaces Using ANOVA-Based Matrix-Vector Multiplication"

This package uses the FastAdjacency package by Dominik Alfke to perform NFFT-based fast summation to speed up kernel-vector multiplications for the ANOVA kernel. It is targeted at large-scale kernel evaluations. We demonstrate our method's computational power by using it for kernel ridge regression, which is just one of many possible applications. For more details, see the above-mentioned paper. A huge benefit of this package is that even for very large-scale data, all codes can easily be run on a standard laptop computer in absolutely reasonable time, so that no superior hardware is required.

Installation

Usage

This package consists of the following three classes:

  • kernel_vector_multiplication compares the standard kernel-vector multiplication with kernel-vector multiplication with NFFT-based fast summation in runtime and approximation error.
  • NFFTKernelRidge performs NFFT-based kernel ridge regression.
  • GridSearch searches on candidate parameter values for one of the classifiers NFFTKernelRidge, sklearn KRRor sklearn SVC.

See test/showcase_kernel_vector_multiplication.ipynb and test/showcase_nfft_krr.ipynb for an example.

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