/*
GeoGebra - Dynamic Mathematics for Everyone
http://www.geogebra.org
This file is part of GeoGebra.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation.
*/
package org.geogebra.common.kernel.statistics;
import org.apache.commons.math3.stat.descriptive.rank.Percentile;
import org.geogebra.common.kernel.Construction;
import org.geogebra.common.kernel.algos.AlgoElement;
import org.geogebra.common.kernel.arithmetic.NumberValue;
import org.geogebra.common.kernel.commands.Commands;
import org.geogebra.common.kernel.geos.GeoElement;
import org.geogebra.common.kernel.geos.GeoList;
import org.geogebra.common.kernel.geos.GeoNumeric;
/**
* Returns the percentile for a given percentage in a list of numbers
*/
public class AlgoPercentile extends AlgoElement {
private GeoList inputList; // input
private GeoNumeric value; // input
private GeoNumeric result; // output
private int size;
private Percentile percentile;
private double[] inputArray;
private double val;
public AlgoPercentile(Construction cons, String label, GeoList inputList,
GeoNumeric value) {
super(cons);
this.inputList = inputList;
this.value = value;
result = new GeoNumeric(cons);
setInputOutput();
compute();
result.setLabel(label);
}
@Override
public Commands getClassName() {
return Commands.Percentile;
}
@Override
protected void setInputOutput() {
input = new GeoElement[2];
input[0] = inputList;
input[1] = value;
setOnlyOutput(result);
setDependencies(); // done by AlgoElement
}
public GeoNumeric getResult() {
return result;
}
@Override
public final void compute() {
// ==========================
// validation
size = inputList.size();
if (!inputList.isDefined() || size == 0) {
result.setUndefined();
return;
}
if (value == null) {
result.setUndefined();
return;
}
val = value.getDouble() * 100;
if (val <= 0 || val > 100) {
result.setUndefined();
return;
}
// ==========================
// compute result
inputArray = new double[size];
// load input value array from geoList
for (int i = 0; i < size; i++) {
GeoElement geo = inputList.get(i);
if (geo instanceof NumberValue) {
NumberValue num = (NumberValue) geo;
inputArray[i] = num.getDouble();
} else {
result.setUndefined();
return;
}
}
if (percentile == null) {
percentile = new Percentile();
}
percentile.setData(inputArray);
result.setValue(percentile.evaluate(val));
}
}