/**
* Tests out the perceptron with the classic xor test
*
* @param args ignored
*/
public static void main(String[] args) {
double[][][] data = {
{{1, 1, 1, 1}, {0}},
{{1, 0, 1, 0}, {1}},
{{0, 1, 0, 1}, {1}},
{{0, 0, 0, 0}, {0}}
};
Instance[] patterns = new Instance[data.length];
for (int i = 0; i < patterns.length; i++) {
patterns[i] = new Instance(data[i][0]);
patterns[i].setLabel(new Instance(data[i][1]));
}
FeedForwardNeuralNetworkFactory factory = new FeedForwardNeuralNetworkFactory();
FeedForwardNetwork network = factory.createClassificationNetwork(new int[] {4, 3, 1});
ErrorMeasure measure = new SumOfSquaresError();
DataSet set = new DataSet(patterns);
NeuralNetworkOptimizationProblem nno =
new NeuralNetworkOptimizationProblem(set, network, measure);
OptimizationAlgorithm o = new RandomizedHillClimbing(nno);
FixedIterationTrainer fit = new FixedIterationTrainer(o, 5000);
fit.train();
Instance opt = o.getOptimal();
network.setWeights(opt.getData());
for (int i = 0; i < patterns.length; i++) {
network.setInputValues(patterns[i].getData());
network.run();
System.out.println("~~");
System.out.println(patterns[i].getLabel());
System.out.println(network.getOutputValues());
}
}
/**
* The test main
*
* @param args ignored
*/
public static void main(String[] args) {
int[] copies = new int[NUM_ITEMS];
Arrays.fill(copies, COPIES_EACH);
double[] weights = {
14.006873891334399,
0.9388306474803154,
26.119866173905713,
20.546411641966962,
12.456703411391896,
32.322455327605255,
38.750240535343956,
23.859794102127896,
45.011525134982286,
10.776070365757933,
46.065756634733006,
7.828572903429926,
24.743263676002634,
33.20916476805507,
16.51246534149665,
23.443925006858134,
18.57022530279454,
5.706896488446161,
23.44607697986756,
1.5545804205003566,
27.0302859936824,
21.097619402619628,
43.60173756385764,
49.44832347485482,
25.910156034801474,
27.91751206001118,
36.658173210220255,
40.881378221999206,
48.83228771437947,
35.49885544313467,
16.247757455771072,
25.53223124143824,
2.400993598957707,
12.408533226752189,
35.26405639169894,
46.35644830194322,
18.009317731328604,
47.96332151014204,
20.81843428091102,
15.819063866703608
};
double[] volumes = {
44.57809711968351,
1.988378753951514,
47.593739208727456,
36.569659867427994,
1.5845284028427165,
41.7861748607473,
24.69594875244368,
43.03123587633294,
7.248980459072457,
23.327415667901835,
36.105898702916086,
24.87957120462097,
36.910177249731724,
27.30395021307583,
37.74427091808214,
21.681239410167937,
8.318371979533667,
16.88207551035857,
34.91767868192272,
9.456202413374893,
47.184521478105424,
35.65391669513947,
7.1158444301557155,
44.53433689634305,
49.16774307587011,
13.564617532166368,
38.36035512523829,
2.3636140632733618,
38.08282614908438,
49.310535335495906,
42.75495808871727,
28.422383043559908,
31.486561856652965,
7.283678338886252,
5.795560154240054,
38.749456539160306,
37.74109110751328,
0.7802313639065139,
19.468811616414722,
17.029576884574187
};
int[] ranges = new int[NUM_ITEMS];
Arrays.fill(ranges, COPIES_EACH + 1);
EvaluationFunction ef =
new KnapsackEvaluationFunction(weights, volumes, KNAPSACK_VOLUME, copies);
System.out.println("Trial;Fitness;RunningTime");
for (int x = 10; x <= 1000; x = x + 10) {
Distribution odd = new DiscreteUniformDistribution(ranges);
NeighborFunction nf = new DiscreteChangeOneNeighbor(ranges);
MutationFunction mf = new DiscreteChangeOneMutation(ranges);
CrossoverFunction cf = new UniformCrossOver();
Distribution df = new DiscreteDependencyTree(.1, ranges);
HillClimbingProblem hcp = new GenericHillClimbingProblem(ef, odd, nf);
GeneticAlgorithmProblem gap = new GenericGeneticAlgorithmProblem(ef, odd, mf, cf);
ProbabilisticOptimizationProblem pop =
new GenericProbabilisticOptimizationProblem(ef, odd, df);
MIMIC mimic = new MIMIC(x, x / 5, pop);
FixedIterationTrainer fit = new FixedIterationTrainer(mimic, 500);
fit = new FixedIterationTrainer(mimic, 500);
double MIMIC_start = System.nanoTime();
fit.train();
double MIMIC_end = System.nanoTime();
double MIMIC_trainingTime = MIMIC_end - MIMIC_start;
MIMIC_trainingTime /= Math.pow(10, 9);
/** Print out the values for each trial */
System.out.println(x + ";" + ef.value(mimic.getOptimal()) + ";" + MIMIC_trainingTime);
}
}
public void run(int iterations) throws Exception {
// 1) Construct data instances for training. These will also be run
// through the network at the bottom to verify the output
CSVDataSetReader reader = new CSVDataSetReader("data/letter_training_new.data");
DataSet set = reader.read();
LabelSplitFilter flt = new LabelSplitFilter();
flt.filter(set);
DataSetLabelBinarySeperator.seperateLabels(set);
DataSetDescription desc = set.getDescription();
DataSetDescription labelDesc = desc.getLabelDescription();
// 2) Instantiate a network using the FeedForwardNeuralNetworkFactory. This network
// will be our classifier.
FeedForwardNeuralNetworkFactory factory = new FeedForwardNeuralNetworkFactory();
// 2a) These numbers correspond to the number of nodes in each layer.
// This network has 4 input nodes, 3 hidden nodes in 1 layer, and 1 output node in the
// output layer.
FeedForwardNetwork network =
factory.createClassificationNetwork(
new int[] {
desc.getAttributeCount(),
factory.getOptimalHiddenLayerNodes(desc, labelDesc),
labelDesc.getDiscreteRange()
});
// 3) Instantiate a measure, which is used to evaluate each possible set of weights.
ErrorMeasure measure = new SumOfSquaresError();
// 4) Instantiate a DataSet, which adapts a set of instances to the optimization problem.
// DataSet set = new DataSet(patterns);
// 5) Instantiate an optimization problem, which is used to specify the dataset, evaluation
// function, mutator and crossover function (for Genetic Algorithms), and any other
// parameters used in optimization.
NeuralNetworkOptimizationProblem nno =
new NeuralNetworkOptimizationProblem(set, network, measure);
// 6) Instantiate a specific OptimizationAlgorithm, which defines how we pick our next potential
// hypothesis.
OptimizationAlgorithm o = new RandomizedHillClimbing(nno);
// 7) Instantiate a trainer. The FixtIterationTrainer takes another trainer (in this case,
// an OptimizationAlgorithm) and executes it a specified number of times.
FixedIterationTrainer fit = new FixedIterationTrainer(o, iterations);
// 8) Run the trainer. This may take a little while to run, depending on the
// OptimizationAlgorithm,
// size of the data, and number of iterations.
fit.train();
// 9) Once training is done, get the optimal solution from the OptimizationAlgorithm. These are
// the
// optimal weights found for this network.
Instance opt = o.getOptimal();
network.setWeights(opt.getData());
// 10) Run the training data through the network with the weights discovered through
// optimization, and
// print out the expected label and result of the classifier for each instance.
int[] labels = {0, 1};
TestMetric acc = new AccuracyTestMetric();
TestMetric cm = new ConfusionMatrixTestMetric(labels);
Tester t = new NeuralNetworkTester(network, acc, cm);
t.test(set.getInstances());
acc.printResults();
}
public static void main(String[] args) {
if (args.length < 2) {
System.out.println("Provide a input size and repeat count");
System.exit(0);
}
int N = Integer.parseInt(args[0]);
if (N < 0) {
System.out.println(" N cannot be negaitve.");
System.exit(0);
}
Random random = new Random();
// create the random points
double[][] points = new double[N][2];
for (int i = 0; i < points.length; i++) {
points[i][0] = random.nextDouble();
points[i][1] = random.nextDouble();
}
int iterations = Integer.parseInt(args[1]);
// for rhc, sa, and ga we use a permutation based encoding
TravelingSalesmanEvaluationFunction ef = new TravelingSalesmanRouteEvaluationFunction(points);
Distribution odd = new DiscretePermutationDistribution(N);
NeighborFunction nf = new SwapNeighbor();
MutationFunction mf = new SwapMutation();
CrossoverFunction cf = new TravelingSalesmanCrossOver(ef);
HillClimbingProblem hcp = new GenericHillClimbingProblem(ef, odd, nf);
GeneticAlgorithmProblem gap = new GenericGeneticAlgorithmProblem(ef, odd, mf, cf);
System.out.println("Randomized Hill Climbing\n---------------------------------");
for (int i = 0; i < iterations; i++) {
RandomizedHillClimbing rhc = new RandomizedHillClimbing(hcp);
long t = System.nanoTime();
FixedIterationTrainer fit = new FixedIterationTrainer(rhc, 200000);
fit.train();
System.out.println(
ef.value(rhc.getOptimal()) + ", " + (((double) (System.nanoTime() - t)) / 1e9d));
}
System.out.println("Simulated Annealing \n---------------------------------");
for (int i = 0; i < iterations; i++) {
SimulatedAnnealing sa = new SimulatedAnnealing(1E12, .95, hcp);
long t = System.nanoTime();
FixedIterationTrainer fit = new FixedIterationTrainer(sa, 200000);
fit.train();
System.out.println(
ef.value(sa.getOptimal()) + ", " + (((double) (System.nanoTime() - t)) / 1e9d));
}
System.out.println("Genetic Algorithm\n---------------------------------");
for (int i = 0; i < iterations; i++) {
StandardGeneticAlgorithm ga = new StandardGeneticAlgorithm(200, 150, 10, gap);
long t = System.nanoTime();
FixedIterationTrainer fit = new FixedIterationTrainer(ga, 1000);
fit.train();
System.out.println(
ef.value(ga.getOptimal()) + ", " + (((double) (System.nanoTime() - t)) / 1e9d));
}
System.out.println("MIMIC \n---------------------------------");
// for mimic we use a sort encoding
int[] ranges = new int[N];
Arrays.fill(ranges, N);
odd = new DiscreteUniformDistribution(ranges);
Distribution df = new DiscreteDependencyTree(.1, ranges);
for (int i = 0; i < iterations; i++) {
ProbabilisticOptimizationProblem pop =
new GenericProbabilisticOptimizationProblem(ef, odd, df);
MIMIC mimic = new MIMIC(200, 60, pop);
long t = System.nanoTime();
FixedIterationTrainer fit = new FixedIterationTrainer(mimic, 1000);
fit.train();
System.out.println(
ef.value(mimic.getOptimal()) + ", " + (((double) (System.nanoTime() - t)) / 1e9d));
}
}
/**
* The test main
*
* @param args ignored
*/
public static void main(String[] args) {
int[] copies = new int[NUM_ITEMS];
Arrays.fill(copies, COPIES_EACH);
double[] weights = new double[NUM_ITEMS];
double[] volumes = new double[NUM_ITEMS];
for (int i = 0; i < NUM_ITEMS; i++) {
weights[i] = random.nextDouble() * MAX_WEIGHT;
volumes[i] = random.nextDouble() * MAX_VOLUME;
}
int[] ranges = new int[NUM_ITEMS];
Arrays.fill(ranges, COPIES_EACH + 1);
EvaluationFunction ef =
new KnapsackEvaluationFunction(weights, volumes, KNAPSACK_VOLUME, copies);
Distribution odd = new DiscreteUniformDistribution(ranges);
NeighborFunction nf = new DiscreteChangeOneNeighbor(ranges);
MutationFunction mf = new DiscreteChangeOneMutation(ranges);
CrossoverFunction cf = new UniformCrossOver();
Distribution df = new DiscreteDependencyTree(.1, ranges);
HillClimbingProblem hcp = new GenericHillClimbingProblem(ef, odd, nf);
GeneticAlgorithmProblem gap = new GenericGeneticAlgorithmProblem(ef, odd, mf, cf);
ProbabilisticOptimizationProblem pop = new GenericProbabilisticOptimizationProblem(ef, odd, df);
for (int baseIteration : new int[] {1000, 10000, 50000, 100000, 150000, 200000}) {
long startTime = System.currentTimeMillis();
RandomizedHillClimbing rhc = new RandomizedHillClimbing(hcp);
FixedIterationTrainer fit = new FixedIterationTrainer(rhc, baseIteration);
fit.train();
long endTime = System.currentTimeMillis();
System.out.println(
"RHC\t"
+ baseIteration
+ "\t"
+ (endTime - startTime)
+ "\t"
+ ef.value(rhc.getOptimal()));
startTime = System.currentTimeMillis();
SimulatedAnnealing sa = new SimulatedAnnealing(100, .95, hcp);
fit = new FixedIterationTrainer(sa, baseIteration);
fit.train();
endTime = System.currentTimeMillis();
System.out.println(
"SA\t" + baseIteration + "\t" + (endTime - startTime) + "\t" + ef.value(sa.getOptimal()));
startTime = System.currentTimeMillis();
StandardGeneticAlgorithm ga = new StandardGeneticAlgorithm(100, 75, 12, gap);
fit = new FixedIterationTrainer(ga, baseIteration / 100);
fit.train();
endTime = System.currentTimeMillis();
System.out.println(
"GA\t" + baseIteration + "\t" + (endTime - startTime) + "\t" + ef.value(ga.getOptimal()));
startTime = System.currentTimeMillis();
MIMIC mimic = new MIMIC(100, 50, pop);
fit = new FixedIterationTrainer(mimic, baseIteration / 100);
fit.train();
endTime = System.currentTimeMillis();
System.out.println(
"MIMIC\t"
+ baseIteration
+ "\t"
+ (endTime - startTime)
+ "\t"
+ ef.value(mimic.getOptimal()));
}
}
