Ejemplo n.º 1
0
 private static void testRBFFeatures(int xDim, double[] xMin, double[] xMax, double[] xSamples)
     throws IOException {
   final int nbRBFFeatPerDim = 11;
   final double sigmaRBF = 0.1;
   final boolean normalizedRBF = true;
   @NonNull final double[][] stateCenters = ArrUtils.buildGrid(xMin, xMax, nbRBFFeatPerDim);
   @NonNull
   final RBFFeatures rbf =
       new RBFFeatures(stateCenters, ArrUtils.constvec(xDim, sigmaRBF), normalizedRBF);
   plotFeatures(rbf, xSamples);
 }
Ejemplo n.º 2
0
  @SuppressWarnings("null")
  private static void plotFeatures(Features feat, double[] xSamples) throws IOException {
    final int nbRBFFeat = feat.outDim;
    final int nbSamples = xSamples.length;

    @NonNull final double[][] yRBF = new double[nbSamples][nbRBFFeat];
    final long startTime = System.currentTimeMillis();
    for (int i = 0; i < nbSamples; i++) {
      @NonNull final double[] x = new double[] {xSamples[i]};
      feat.phi(x, yRBF[i]);
    }
    final long endTime = System.currentTimeMillis();
    System.out.println("Time elapsed : " + (endTime - startTime));
    System.out.println(ArrUtils.toString(yRBF));
    @NonNull final Plot2D plotRBF = new Plot2D(feat.toString(), "x", "y");
    plotRBF.plot(xSamples, ArrUtils.transpose(yRBF, nbSamples, nbRBFFeat)[0]);
  }
Ejemplo n.º 3
0
  /**
   * @param args
   * @throws Exception
   */
  public static void main(String[] args) throws Exception {
    final int xDim = 1;
    @NonNull final double[] xMin = ArrUtils.zeros(xDim);
    @NonNull final double[] xMax = ArrUtils.ones(xDim);

    int nbSamplesPerDim = 101;
    // final double[][] xSamples = ArrUtils.buildGrid(xMin, xMax, nbSamplesPerDim);
    @NonNull final double[] xSamples = ArrUtils.linspace(xMin[0], xMax[0], nbSamplesPerDim);

    final int featType = Utils.chooseOne(new String[] {"RBFFeatures", "FourierRandomFeatures"});

    switch (featType) {
        // RBFFeatures
      case 0:
        testRBFFeatures(xDim, xMin, xMax, xSamples);
        break;
        // FourierRandomFeatures
      case 1:
        testFourierRandomFeatures(xDim, xSamples);
        break;
    }

    Utils.waitForKeypress();
  }