com.itemanalysis.psychometrics.scaling.ScoreTable.java Source code

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Here is the source code for com.itemanalysis.psychometrics.scaling.ScoreTable.java

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/*
 * Copyright 2012 J. Patrick Meyer
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.itemanalysis.psychometrics.scaling;

import org.apache.commons.math3.analysis.interpolation.LinearInterpolator;
import org.apache.commons.math3.analysis.polynomials.PolynomialSplineFunction;

import java.util.Formatter;
import java.util.TreeMap;

/**
 *
 * @author J. Patrick Meyer <meyerjp at itemanalysis.com>
 */
public class ScoreTable {

    private ScoreBounds sumScoreBounds = null;

    private Double by = 1.0;

    private int precision = 4;

    private TreeMap<Double, Double> table = null;

    private String name = "";

    public ScoreTable(ScoreBounds sumScoreBounds) {
        this(sumScoreBounds, 1.0, "Score", 4);
    }

    public ScoreTable(ScoreBounds sumScoreBounds, String name) {
        this(sumScoreBounds, 1.0, name, 4);
    }

    public ScoreTable(ScoreBounds sumScoreBounds, int precision) {
        this(sumScoreBounds, 1.0, "Score", precision);
    }

    public ScoreTable(ScoreBounds sumScoreBounds, String name, int precision) {
        this(sumScoreBounds, 1.0, name, precision);
    }

    public ScoreTable(ScoreBounds sumScoreBounds, Double by, String name, int precision) {
        this.sumScoreBounds = sumScoreBounds;
        this.by = by;
        this.name = name;
        this.precision = precision;
        table = new TreeMap<Double, Double>();
    }

    public void kelleyScoreTable(KelleyRegressedScore kelley, LinearTransformation linearTransformation,
            ScoreBounds scaleScoreBounds, boolean rescale) {
        double x = sumScoreBounds.getMinPossibleScore();
        double max = sumScoreBounds.getMaxPossibleScore();
        double k = 0.0;
        while (x <= max) {
            k = scaleScoreBounds.checkConstraints(kelley.value(x, linearTransformation));
            table.put(x, k);
            x += by;
        }
    }

    public void normalizedScoreTable(NormalizedScore normScore, ScoreBounds scaleScoreBounds, boolean rescale) {
        Double min = sumScoreBounds.getMinPossibleScore();
        Double x = min;
        Double max = sumScoreBounds.getMaxPossibleScore();
        Double n = 0.0;

        x = min;

        while (x <= max) {
            n = scaleScoreBounds.checkConstraints(normScore.getNormalizedScoreAt(x));
            table.put(x, n);
            x += by;
        }

    }

    public TreeMap<Double, Double> getTable() {
        return table;
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        Formatter f = new Formatter(sb);

        String f1 = "%10." + precision + "f";
        String f2 = "%10s";
        //      String f3="%10.4f";

        //table header
        f.format("%28s", "SCORE TABLE");
        f.format("%n");
        f.format("%45s", "=============================================");
        f.format("%n");
        f.format(f2, "Original");
        f.format("%5s", "");
        f.format(f2, "Kelley");
        f.format("%n");

        f.format(f2, "Value");
        f.format("%5s", "");
        f.format(f2, "Score");
        f.format("%n");
        f.format("%45s", "---------------------------------------------");
        f.format("%n");

        for (Double d : table.keySet()) {
            f.format(f1, d);
            f.format("%5s", "");
            f.format(f1, table.get(d));
            f.format("%5s", "");
            f.format("%n");
        }

        f.format("%45s", "=============================================");
        f.format("%n");
        return f.toString();

    }

}