package de.lmu.ifi.dbs.elki.visualization.projector;
/*
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/>.
*/
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import de.lmu.ifi.dbs.elki.data.NumberVector;
import de.lmu.ifi.dbs.elki.database.relation.Relation;
import de.lmu.ifi.dbs.elki.math.MathUtil;
import de.lmu.ifi.dbs.elki.result.AbstractHierarchicalResult;
import de.lmu.ifi.dbs.elki.result.ResultUtil;
import de.lmu.ifi.dbs.elki.result.ScalesResult;
import de.lmu.ifi.dbs.elki.visualization.VisualizationTask;
import de.lmu.ifi.dbs.elki.visualization.gui.overview.PlotItem;
import de.lmu.ifi.dbs.elki.visualization.projections.ProjectionParallel;
import de.lmu.ifi.dbs.elki.visualization.projections.SimpleParallel;
/**
* ParallelPlotProjector is responsible for producing a parallel axes
* visualization.
*
* @author Robert Rödler
*
* @param <V> Vector type
*/
// TODO: support categorical features, and multiple relations too
public class ParallelPlotProjector<V extends NumberVector<?, ?>> extends AbstractHierarchicalResult implements Projector {
/**
* Relation we project
*/
Relation<V> rel;
/**
* Constructor.
*
* @param rel Relation
*/
public ParallelPlotProjector(Relation<V> rel) {
super();
this.rel = rel;
}
@Override
public Collection<PlotItem> arrange() {
List<PlotItem> col = new ArrayList<PlotItem>(1);
List<VisualizationTask> tasks = ResultUtil.filterResults(this, VisualizationTask.class);
if(tasks.size() > 0) {
ScalesResult scales = ResultUtil.getScalesResult(rel);
ProjectionParallel proj = new SimpleParallel(scales.getScales());
final double width = Math.ceil(Math.log(scales.getScales().length) / MathUtil.LOG2);
final PlotItem it = new PlotItem(width, 1., proj);
it.tasks = tasks;
col.add(it);
}
return col;
}
@Override
public String getLongName() {
return "Parallelplot";
}
@Override
public String getShortName() {
return "parallelplot";
}
/**
* The relation we project.
*
* @return Relation
*/
public Relation<V> getRelation() {
return rel;
}
}