public void LogisticsMapCaseDataset()
{
var sbStruct = new StringBuilder();
var sbError = new StringBuilder();
var sbPred = new StringBuilder();
sbStruct.AppendLine("r;c_x");
sbError.AppendLine("r;err;count");
sbPred.AppendLine("r;x;predicted_x");
var fis = new NeoFuzzyNetwork(1, xmin: 0, xmax: 1, m: 2, maxM: 200, alpha: 1e-2, beta: 1e-2, ageLimit: 100);
for (var r = 1.1; r < 3.88; r += 1e-3)
{
var px = 0.1;
var lx = r * px * (1 - px);
for (var i = 0; i < 100000; i++)
{
px = lx;
lx = r * lx * (1 - lx);
fis.InferenceWithLearning(new[] { px }, lx);
}
for (var i = 0; i < 80; i++)
{
px = lx;
lx = r * lx * (1 - lx);
var pred = fis.Inference(new[] { px });
sbPred.AppendLine($"{r};{lx};{pred}");
}
sbError.AppendLine($"{r};{Math.Abs(fis.GeneralError)};{fis._layers[0].Size}");
foreach (var core in fis._layers[0].B)
{
sbStruct.AppendLine($"{r};{core}\r\n");
}
}
File.WriteAllText("silva_logistic_map_1d_fis.csv",
sbStruct.ToString());
File.WriteAllText("silva_logistic_map_1d_fis_error.csv",
sbError.ToString());
File.WriteAllText("silva_logistic_map_1d_fis_pred.csv",
sbPred.ToString());
}
public void LogisticsMapCase()
{
_enfn = new NeoFuzzyNetwork(1, xmin: 0, xmax: 1, m: 2, maxM: 200, alpha: 1e-2, beta: 1e-2, ageLimit: 100);
var px = 0.1;
const double r = 3.580999999999727; //3.8;
var lx = r * px * (1 - px);
var error = 0.0;
const double iters = 10000;
for (var i = 0; i < iters; i++)
{
px = lx;
lx = r * lx * (1 - lx);
var predicted = _enfn.InferenceWithLearning(new[] { px }, lx);
error += Math.Abs(lx - predicted);
}
Assert.Less(error / iters, 1.0);
}
public void LogisticsMap2dCase()
{
_enfn = new NeoFuzzyNetwork(2, xmin: 0, xmax: 1, m: 2, maxM: 100, alpha: 1e-2, beta: 1e-2, ageLimit: 10000);
var px = 0.1;
const double r = 3.8;
var lx = r * px * (1 - px);
var error = 0.0;
for (int i = 0; i < 100000; i++)
{
var inp = new double[] { px, lx };
px = lx;
lx = r * lx * (1 - lx);
var expected = lx;
var predicted = _enfn.InferenceWithLearning(inp, expected);
error += Math.Abs(expected - predicted);
}
Assert.Less(error / 100000, 1.0);
}