edu.umd.cs.psl.evaluation.statistics.SimpleResultComparison.java Source code

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Here is the source code for edu.umd.cs.psl.evaluation.statistics.SimpleResultComparison.java

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/*
 * This file is part of the PSL software.
 * Copyright 2011 University of Maryland
 *
 * 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 edu.umd.cs.psl.evaluation.statistics;

import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;

import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;

import edu.umd.cs.psl.evaluation.statistics.ResultComparison.BinaryClass;
import edu.umd.cs.psl.model.atom.Atom;

public class SimpleResultComparison implements ResultComparison {

    private final Map<Atom, Double> errors;
    private final Set<Atom> correctAtoms;
    private final double tp;
    private final double fp;
    private final double fn;
    private final double tn;
    private final int noBaseAtoms;

    public SimpleResultComparison(Map<Atom, Double> errors, Set<Atom> correctAtoms, int tp, int fp, int tn, int fn,
            int noBase) {
        this.errors = errors;
        this.tp = (double) tp;
        this.fp = (double) fp;
        this.tn = (double) tn;
        this.fn = (double) fn;
        this.correctAtoms = correctAtoms;
        this.noBaseAtoms = noBase;
    }

    @Override
    public Iterable<Entry<Atom, Double>> getErrors() {
        return errors.entrySet();
    }

    public Iterable<Atom> getCorrectAtoms() {
        return correctAtoms;
    }

    public int getNoBaseAtoms() {
        return noBaseAtoms;
    }

    @Override
    public Iterable<Entry<Atom, Double>> getFalseNegatives() {
        return Iterables.filter(errors.entrySet(), new Predicate<Entry<Atom, Double>>() {

            @Override
            public boolean apply(Entry<Atom, Double> e) {
                if (e.getValue() < 0.0)
                    return true;
                else
                    return false;
            }
        });
    }

    @Override
    public Iterable<Entry<Atom, Double>> getFalsePositives() {
        return Iterables.filter(errors.entrySet(), new Predicate<Entry<Atom, Double>>() {

            @Override
            public boolean apply(Entry<Atom, Double> e) {
                if (e.getValue() > 0.0)
                    return true;
                else
                    return false;
            }
        });
    }

    public double getPrecision(BinaryClass c) {
        if (c == BinaryClass.NEGATIVE) {
            double n = tn + fn;
            if (n == 0.0)
                return 0.0;
            return tn / n;
        } else {
            double p = tp + fp;
            if (p == 0.0)
                return 0.0;
            return tp / p;
        }
    }

    public double getRecall(BinaryClass c) {
        if (c == BinaryClass.NEGATIVE) {
            double n = tn + fp;
            if (n == 0.0)
                return 0.0;
            return tn / (tn + fp);
        } else {
            double p = tp + fn;
            if (p == 0.0)
                return 0.0;
            return tp / (tp + fn);
        }
    }

    public double getF1(BinaryClass c) {
        double prec = this.getPrecision(c);
        double rec = this.getRecall(c);
        double sum = prec + rec;
        if (sum == 0.0)
            return 0.0;
        return 2 * (prec * rec) / sum;
    }

    public double getAccuracy() {
        if (noBaseAtoms == 0)
            return 0;
        return (tp + tn) / (tp + fp + tn + fn);
    }

}