Import Upstream version 0.5.0~beta2

1 files changed, 239 insertions, 0 deletions

diff --git a/src/de/lmu/ifi/dbs/elki/visualization/projections/AbstractFullProjection.java b/src/de/lmu/ifi/dbs/elki/visualization/projections/AbstractFullProjection.java
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+package de.lmu.ifi.dbs.elki.visualization.projections;
+
+import de.lmu.ifi.dbs.elki.data.NumberVector;
+import de.lmu.ifi.dbs.elki.math.linearalgebra.Vector;
+import de.lmu.ifi.dbs.elki.math.scales.LinearScale;
+
+/*
+ This file is part of ELKI:
+ Environment for Developing KDD-Applications Supported by Index-Structures
+
+ Copyright (C) 2012
+ Ludwig-Maximilians-Universität München
+ Lehr- und Forschungseinheit für Datenbanksysteme
+ ELKI Development Team
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Abstract base class for full projections.
+ * 
+ * Note: the full projection API may be removed at some point, unless we find a
+ * clear use case that cannot be done by the low level fast projections.
+ * 
+ * @author Erich Schubert
+ */
+public abstract class AbstractFullProjection extends AbstractProjection implements FullProjection {
+  /**
+   * Constructor.
+   * 
+   * @param scales Scales
+   */
+  public AbstractFullProjection(LinearScale[] scales) {
+    super(scales);
+  }
+
+  /**
+   * Project a data vector from data space to scaled space.
+   * 
+   * @param data vector in data space
+   * @return vector in scaled space
+   */
+  @Override
+  public Vector projectDataToScaledSpace(NumberVector<?, ?> data) {
+    final int dim = data.getDimensionality();
+    Vector vec = new Vector(dim);
+    double[] ds = vec.getArrayRef();
+    for(int d = 0; d < dim; d++) {
+      ds[d] = scales[d].getScaled(data.doubleValue(d + 1));
+    }
+    return vec;
+  }
+
+  /**
+   * Project a data vector from data space to scaled space.
+   * 
+   * @param data vector in data space
+   * @return vector in scaled space
+   */
+  @Override
+  public Vector projectDataToScaledSpace(Vector data) {
+    double[] src = data.getArrayRef();
+    final int dim = src.length;
+    double[] dst = new double[dim];
+    for(int d = 0; d < dim; d++) {
+      dst[d] = scales[d].getScaled(src[d]);
+    }
+    return new Vector(dst);
+  }
+
+  /**
+   * Project a relative data vector from data space to scaled space.
+   * 
+   * @param data relative vector in data space
+   * @return relative vector in scaled space
+   */
+  @Override
+  public Vector projectRelativeDataToScaledSpace(NumberVector<?, ?> data) {
+    final int dim = data.getDimensionality();
+    Vector vec = new Vector(dim);
+    double[] ds = vec.getArrayRef();
+    for(int d = 0; d < dim; d++) {
+      ds[d] = scales[d].getRelativeScaled(data.doubleValue(d + 1));
+    }
+    return vec;
+  }
+
+  /**
+   * Project a relative data vector from data space to scaled space.
+   * 
+   * @param data relative vector in data space
+   * @return relative vector in scaled space
+   */
+  @Override
+  public Vector projectRelativeDataToScaledSpace(Vector data) {
+    double[] src = data.getArrayRef();
+    final int dim = src.length;
+    double[] dst = new double[dim];
+    for(int d = 0; d < dim; d++) {
+      dst[d] = scales[d].getRelativeScaled(src[d]);
+    }
+    return new Vector(dst);
+  }
+
+  /**
+   * Project a data vector from data space to rendering space.
+   * 
+   * @param data vector in data space
+   * @return vector in rendering space
+   */
+  @Override
+  public Vector projectDataToRenderSpace(NumberVector<?, ?> data) {
+    return projectScaledToRender(projectDataToScaledSpace(data));
+  }
+
+  /**
+   * Project a data vector from data space to rendering space.
+   * 
+   * @param data vector in data space
+   * @return vector in rendering space
+   */
+  @Override
+  public Vector projectDataToRenderSpace(Vector data) {
+    return projectScaledToRender(projectDataToScaledSpace(data));
+  }
+
+  /**
+   * Project a relative data vector from data space to rendering space.
+   * 
+   * @param data relative vector in data space
+   * @return relative vector in rendering space
+   */
+  @Override
+  public Vector projectRelativeDataToRenderSpace(NumberVector<?, ?> data) {
+    return projectRelativeScaledToRender(projectRelativeDataToScaledSpace(data));
+  }
+
+  /**
+   * Project a relative data vector from data space to rendering space.
+   * 
+   * @param data relative vector in data space
+   * @return relative vector in rendering space
+   */
+  @Override
+  public Vector projectRelativeDataToRenderSpace(Vector data) {
+    return projectRelativeScaledToRender(projectRelativeDataToScaledSpace(data));
+  }
+
+  /**
+   * Project a vector from scaled space to data space.
+   * 
+   * @param <NV> Vector type
+   * @param v vector in scaled space
+   * @param factory Object factory
+   * @return vector in data space
+   */
+  @Override
+  public <NV extends NumberVector<NV, ?>> NV projectScaledToDataSpace(Vector v, NV factory) {
+    final int dim = v.getDimensionality();
+    Vector vec = v.copy();
+    double[] ds = vec.getArrayRef();
+    for(int d = 0; d < dim; d++) {
+      ds[d] = scales[d].getUnscaled(ds[d]);
+    }
+    return factory.newNumberVector(vec.getArrayRef());
+  }
+
+  /**
+   * Project a vector from rendering space to data space.
+   * 
+   * @param <NV> Vector type
+   * @param v vector in rendering space
+   * @param prototype Object factory
+   * @return vector in data space
+   */
+  @Override
+  public <NV extends NumberVector<NV, ?>> NV projectRenderToDataSpace(Vector v, NV prototype) {
+    final int dim = v.getDimensionality();
+    Vector vec = projectRenderToScaled(v);
+    double[] ds = vec.getArrayRef();
+    // Not calling {@link #projectScaledToDataSpace} to avoid extra copy of
+    // vector.
+    for(int d = 0; d < dim; d++) {
+      ds[d] = scales[d].getUnscaled(ds[d]);
+    }
+    return prototype.newNumberVector(vec.getArrayRef());
+  }
+
+  /**
+   * Project a relative vector from scaled space to data space.
+   * 
+   * @param <NV> Vector type
+   * @param v relative vector in scaled space
+   * @param prototype Object factory
+   * @return relative vector in data space
+   */
+  @Override
+  public <NV extends NumberVector<NV, ?>> NV projectRelativeScaledToDataSpace(Vector v, NV prototype) {
+    final int dim = v.getDimensionality();
+    Vector vec = v.copy();
+    double[] ds = vec.getArrayRef();
+    for(int d = 0; d < dim; d++) {
+      ds[d] = scales[d].getRelativeUnscaled(ds[d]);
+    }
+    return prototype.newNumberVector(vec.getArrayRef());
+  }
+
+  /**
+   * Project a relative vector from rendering space to data space.
+   * 
+   * @param <NV> Vector type
+   * @param v relative vector in rendering space
+   * @param prototype Object factory
+   * @return relative vector in data space
+   */
+  @Override
+  public <NV extends NumberVector<NV, ?>> NV projectRelativeRenderToDataSpace(Vector v, NV prototype) {
+    final int dim = v.getDimensionality();
+    Vector vec = projectRelativeRenderToScaled(v);
+    double[] ds = vec.getArrayRef();
+    // Not calling {@link #projectScaledToDataSpace} to avoid extra copy of
+    // vector.
+    for(int d = 0; d < dim; d++) {
+      ds[d] = scales[d].getRelativeUnscaled(ds[d]);
+    }
+    return prototype.newNumberVector(vec.getArrayRef());
+  }
+}