Examples with ModifiableHyperBoundingBox de.lmu.ifi.dbs.elki.data.ModifiableHyperBoundingBox used on opensource projects

Example 6 with ModifiableHyperBoundingBox

use of de.lmu.ifi.dbs.elki.data.ModifiableHyperBoundingBox in project elki by elki-project.

the class SpatialPrimitiveDistanceFunctionTest method testSpatialDistanceConsistency.

@Test
public void testSpatialDistanceConsistency() {
    final Random rnd = new Random(0);
    final int dim = 7;
    final int iters = 10000;
    List<SpatialPrimitiveDistanceFunction<? super NumberVector>> dists = new ArrayList<>();
    dists.add(EuclideanDistanceFunction.STATIC);
    dists.add(ManhattanDistanceFunction.STATIC);
    dists.add(MaximumDistanceFunction.STATIC);
    dists.add(MinimumDistanceFunction.STATIC);
    dists.add(new LPNormDistanceFunction(3));
    dists.add(new LPNormDistanceFunction(.5));
    dists.add(CanberraDistanceFunction.STATIC);
    // Histogram intersection distance isn't proper for negative values
    // dists.add(HistogramIntersectionDistanceFunction.STATIC);
    dists.add(SquaredEuclideanDistanceFunction.STATIC);
    dists.add(ArcCosineDistanceFunction.STATIC);
    dists.add(CosineDistanceFunction.STATIC);
    double[] d1 = new double[dim];
    double[] d2 = new double[dim];
    double[] d3 = new double[dim];
    double[] d4 = new double[dim];
    DoubleVector v1 = DoubleVector.wrap(d1);
    ModifiableHyperBoundingBox mbr = new ModifiableHyperBoundingBox(d2, d3);
    DoubleVector v2 = DoubleVector.wrap(d4);
    for (int i = 0; i < iters; i++) {
        for (int d = 0; d < dim; d++) {
            d1[d] = (rnd.nextDouble() - .5) * 2E4;
            d2[d] = (rnd.nextDouble() - .5) * 2E4;
            d3[d] = (rnd.nextDouble() - .5) * 2E4;
            if (d2[d] > d3[d]) {
                double t = d2[d];
                d2[d] = d3[d];
                d3[d] = t;
            }
            double m = rnd.nextDouble();
            d4[d] = m * d2[d] + (1 - m) * d3[d];
        }
        for (SpatialPrimitiveDistanceFunction<? super NumberVector> dis : dists) {
            compareDistances(v1, mbr, v2, dis);
        }
    }
}

Example 7 with ModifiableHyperBoundingBox

use of de.lmu.ifi.dbs.elki.data.ModifiableHyperBoundingBox in project elki by elki-project.

the class VisualizeGeodesicDistances method run.

@Override
public void run() {
    // Format: Latitude, Longitude
    // München:
    DoubleVector stap = DoubleVector.wrap(new double[] { 48.133333, 11.566667 });
    // New York:
    DoubleVector endp = DoubleVector.wrap(new double[] { 40.712778, -74.005833 });
    // Bavaria:
    ModifiableHyperBoundingBox bb = new ModifiableHyperBoundingBox(new double[] { 47.27011150, 8.97634970 }, new double[] { 50.56471420, 13.83963710 });
    // Bavaria slice on lat
    // bb = new ModifiableHyperBoundingBox(new double[] { 47.27011150, -80 }, //
    // new double[] { 50.56471420, 80 });
    // Bavaria slice on lon
    // bb = new ModifiableHyperBoundingBox(new double[] { -10, 8.97634970 }, //
    // new double[] { 50, 13.83963710 });
    BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
    final double max = model.getEquatorialRadius() * Math.PI;
    // Red: left off-course, green: right off-course
    int red = 0xffff0000;
    int green = 0xff00ff00;
    FiniteProgress prog = LOG.isVerbose() ? new FiniteProgress("columns", width, LOG) : null;
    for (int x = 0; x < width; x++) {
        final double lon = x * 360. / width - 180.;
        for (int y = 0; y < height; y++) {
            final double lat = y * -180. / height + 90.;
            switch(mode) {
                case ATD:
                    {
                        final double atd = model.getEquatorialRadius() * SphereUtil.alongTrackDistanceDeg(stap.doubleValue(0), stap.doubleValue(1), endp.doubleValue(0), endp.doubleValue(1), lat, lon);
                        if (atd < 0) {
                            img.setRGB(x, y, colorMultiply(red, -atd / max, false));
                        } else {
                            img.setRGB(x, y, colorMultiply(green, atd / max, false));
                        }
                        break;
                    }
                case XTD:
                    {
                        final double ctd = model.getEquatorialRadius() * SphereUtil.crossTrackDistanceDeg(stap.doubleValue(0), stap.doubleValue(1), endp.doubleValue(0), endp.doubleValue(1), lat, lon);
                        if (ctd < 0) {
                            img.setRGB(x, y, colorMultiply(red, -ctd / max, false));
                        } else {
                            img.setRGB(x, y, colorMultiply(green, ctd / max, false));
                        }
                        break;
                    }
                case MINDIST:
                    {
                        final double dist = model.minDistDeg(lat, lon, bb.getMin(0), bb.getMin(1), bb.getMax(0), bb.getMax(1));
                        if (dist < 0) {
                            img.setRGB(x, y, colorMultiply(red, -dist / max, true));
                        } else {
                            img.setRGB(x, y, colorMultiply(green, dist / max, true));
                        }
                        break;
                    }
            }
        }
        LOG.incrementProcessed(prog);
    }
    LOG.ensureCompleted(prog);
    try {
        ImageIO.write(img, "png", out);
    } catch (IOException e) {
        LOG.exception(e);
    }
}

Example 8 with ModifiableHyperBoundingBox

use of de.lmu.ifi.dbs.elki.data.ModifiableHyperBoundingBox in project elki by elki-project.

the class SpatialPrimitiveDistanceFunctionTest method testSpatialDistanceConsistencyPositive.

@Test
public void testSpatialDistanceConsistencyPositive() {
    final Random rnd = new Random(1);
    final int dim = 7;
    final int iters = 10000;
    List<SpatialPrimitiveDistanceFunction<? super NumberVector>> dists = new ArrayList<>();
    dists.add(EuclideanDistanceFunction.STATIC);
    dists.add(ManhattanDistanceFunction.STATIC);
    dists.add(MaximumDistanceFunction.STATIC);
    dists.add(MinimumDistanceFunction.STATIC);
    dists.add(new LPNormDistanceFunction(3));
    dists.add(new LPNormDistanceFunction(.5));
    dists.add(CanberraDistanceFunction.STATIC);
    dists.add(HistogramIntersectionDistanceFunction.STATIC);
    dists.add(SquaredEuclideanDistanceFunction.STATIC);
    dists.add(ArcCosineDistanceFunction.STATIC);
    dists.add(CosineDistanceFunction.STATIC);
    double[] d1 = new double[dim];
    double[] d2 = new double[dim];
    double[] d3 = new double[dim];
    double[] d4 = new double[dim];
    DoubleVector v1 = DoubleVector.wrap(d1);
    ModifiableHyperBoundingBox mbr = new ModifiableHyperBoundingBox(d2, d3);
    DoubleVector v2 = DoubleVector.wrap(d4);
    for (int i = 0; i < iters; i++) {
        for (int d = 0; d < dim; d++) {
            d1[d] = rnd.nextDouble() * 2E4;
            d2[d] = rnd.nextDouble() * 2E4;
            d3[d] = rnd.nextDouble() * 2E4;
            if (d2[d] > d3[d]) {
                double t = d2[d];
                d2[d] = d3[d];
                d3[d] = t;
            }
            double m = rnd.nextDouble();
            d4[d] = m * d2[d] + (1 - m) * d3[d];
        }
        for (SpatialPrimitiveDistanceFunction<? super NumberVector> dis : dists) {
            compareDistances(v1, mbr, v2, dis);
        }
    }
}

Example 9 with ModifiableHyperBoundingBox

use of de.lmu.ifi.dbs.elki.data.ModifiableHyperBoundingBox in project elki by elki-project.

the class XSplitter method mbr.

/**
 * Computes and returns the mbr of the specified nodes, only the nodes between
 * from and to index are considered.
 *
 * @param entries the array of node indices in {@link #entries}
 * @param from the start index
 * @param to the end index
 * @return the mbr of the specified nodes
 */
private HyperBoundingBox mbr(final int[] entries, final int from, final int to) {
    SpatialEntry first = this.node.getEntry(entries[from]);
    ModifiableHyperBoundingBox mbr = new ModifiableHyperBoundingBox(first);
    for (int i = from + 1; i < to; i++) {
        mbr.extend(this.node.getEntry(entries[i]));
    }
    return mbr;
}

Example 10 with ModifiableHyperBoundingBox

use of de.lmu.ifi.dbs.elki.data.ModifiableHyperBoundingBox in project elki by elki-project.

the class XSplitter method getRatioOfDataInIntersectionVolume.

/**
 * Get the ratio of data objects in the intersection volume (weighted
 * overlap).
 *
 * @param split two entry lists representing the given split
 * @param mbrs the MBRs for the given split
 * @return the ration of data objects in the intersection volume as value
 *         between 0 and 1
 */
public double getRatioOfDataInIntersectionVolume(List<SpatialEntry>[] split, HyperBoundingBox[] mbrs) {
    final ModifiableHyperBoundingBox xMBR = SpatialUtil.intersection(mbrs[0], mbrs[1]);
    if (xMBR == null) {
        return 0.;
    }
    // Total number of entries, intersecting entries
    int[] numOf = { 0, 0 };
    countXingDataEntries(split[0], xMBR, numOf);
    countXingDataEntries(split[1], xMBR, numOf);
    return numOf[1] / (double) numOf[0];
}