package de.lmu.ifi.dbs.elki.utilities.scaling;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2015
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
* Key: {@code -clipscale.min} *
*/ public static final OptionID MIN_ID = new OptionID("clipscale.min", "Minimum value to allow."); /** * Parameter to specify the maximum value ** Key: {@code -clipscale.max} *
*/ public static final OptionID MAX_ID = new OptionID("clipscale.max", "Maximum value to allow."); /** * Field storing the minimum to use */ private Double min = null; /** * Field storing the maximum to use */ private Double max = null; /** * Constructor. * * @param min Minimum, may be null * @param max Maximum, may be null */ public ClipScaling(Double min, Double max) { super(); this.min = min; this.max = max; } @Override public double getScaled(double value) { if(min != null && value < min) { return min; } if(max != null && value > max) { return max; } return value; } @Override public double getMin() { return (min != null) ? min : Double.NEGATIVE_INFINITY; } @Override public double getMax() { return (max != null) ? max : Double.POSITIVE_INFINITY; } /** * Parameterization class. * * @author Erich Schubert * * @apiviz.exclude */ public static class Parameterizer extends AbstractParameterizer { protected Double min = null; protected Double max = null; @Override protected void makeOptions(Parameterization config) { super.makeOptions(config); DoubleParameter minP = new DoubleParameter(MIN_ID); minP.setOptional(true); if(config.grab(minP)) { min = minP.getValue(); } DoubleParameter maxP = new DoubleParameter(MAX_ID); maxP.setOptional(true); if (config.grab(maxP)) { max = maxP.getValue(); } } @Override protected ClipScaling makeInstance() { return new ClipScaling(min, max); } } }