/// <summary>
/// Calculates future values based on alreadyknown Parameters
/// </summary>
/// <param name="yearWithValues">List that gets extended</param>
/// <param name="from">startyear</param>
/// <param name="futureYear">year in the future</param>
/// <param name="parStor">parameter</param>
/// <returns></returns>
public List <YearWithValue> Predict(List <YearWithValue> yearWithValues, int from, int futureYear, ParameterStorage parStor)
{
double j = yearWithValues.Max(k => k.Year);
float valueToDiv = CategoriesWithYearsAndValues.GetValuesFromList(yearWithValues).Max();
float[] inputs = CategoriesWithYearsAndValues.GetYearsFromList(yearWithValues);
List <double> listForTheNormalizedInputs = new List <double>();
foreach (var item in inputs)
{
listForTheNormalizedInputs.Add(item); //Small brain schleife?
}
Input input = StandardizationYears(listForTheNormalizedInputs, futureYear);
inputs = input.getAlleJahreNormiert();
if (j < futureYear)
{
float inputsMax = inputs.Max();
while (j < futureYear)
{
j++;
yearWithValues.Add(new YearWithValue(j, new Wert((parStor.W * inputsMax + parStor.b) * valueToDiv)));
float[] inputtemp = CategoriesWithYearsAndValues.GetYearsFromList(yearWithValues);
List <double> fuckinghelpme = new List <double>();
foreach (var item in inputtemp)
{
fuckinghelpme.Add(item); //Small brain schleife?
}
Input input2 = StandardizationYears(fuckinghelpme, futureYear);
inputtemp = input2.getAlleJahreNormiert();
inputsMax = inputtemp.Max();
}
}
else //cut list from year to futureyear
{
if (futureYear > from)
{
int indexMax = yearWithValues.FindIndex(a => a.Year == Convert.ToInt32(futureYear)); //finde Index von Jahr bis zu dem man Daten braucht
yearWithValues.RemoveRange(indexMax, yearWithValues.Count - indexMax); //Cutte List von Jahr bis zu dem man es braucht bis Ende
int indexMin = yearWithValues.FindIndex(b => b.Year == Convert.ToInt32(from));
yearWithValues.RemoveRange(0, indexMin);
}
else
{
var temp = yearWithValues.Where(x => x.Year == from);
yearWithValues = temp.ToList();;
}
}
return(yearWithValues);
}
public async Task <List <YearWithValue> > TrainLinearOneOutputAsync(List <YearWithValue> KnownValues, int FutureYear)
{
var device = DeviceDescriptor.UseDefaultDevice();
////Step 2: define values, and variables
Variable x = Variable.InputVariable(new NDShape(1, 1), DataType.Float, "input");
Variable y = Variable.InputVariable(new NDShape(1, 1), DataType.Float, "output");
////Step 2: define training data set from table above
float[] inputs = CategoriesWithYearsAndValues.GetYearsFromList(KnownValues);
List <double> temp = new List <double>();
foreach (var item in inputs)
{
temp.Add(item); //Small brain schleife?
}
Input input = StandardizationYears(temp, FutureYear);
inputs = input.getAlleJahreNormiert();
float[] outputs = CategoriesWithYearsAndValues.GetValuesFromList(KnownValues);
//Value.CreateBatch(Tensor(Achsen, Dimension), Werte, cpu/gpu)
float[] outputsnormiert = new float[outputs.Count()];
float WertZumDividieren = outputs.Max();
for (int i = 0; i < outputs.Length; i++)
{
outputsnormiert[i] = outputs[i] / WertZumDividieren;
}
//Werte normiert lassen, sonst stackoverflow :>
var xValues = Value.CreateBatch(new NDShape(1, 1), GetLastNValues(inputs, inputs.Length, input.step), device);
var yValues = Value.CreateBatch(new NDShape(1, 1), GetLastNValues(outputsnormiert, outputs.Length, input.step), device);
////Step 3: create linear regression model
var lr = createLRModel(x, device);
////Network model contains only two parameters b and w, so we query
////the model in order to get parameter values
var paramValues = lr.Inputs.Where(z => z.IsParameter).ToList();
var totalParameters = paramValues.Sum(c => c.Shape.TotalSize);
////Step 4: create trainer
var trainer = createTrainer(lr, y);
////Ştep 5: training
double b = 0, w = 0;
int max = 2000;
for (int i = 1; i <= max; i++)
{
var d = new Dictionary <Variable, Value>();
d.Add(x, xValues);
d.Add(y, yValues);
//
trainer.TrainMinibatch(d, true, device);
//
var loss = trainer.PreviousMinibatchLossAverage();
var eval = trainer.PreviousMinibatchEvaluationAverage();
//
if (i % 200 == 0)
{
Console.WriteLine($"It={i}, Loss={loss}, Eval={eval}");
}
if (i == max)
{
//print weights
var b0_name = paramValues[0].Name;
var b0 = new Value(paramValues[0].GetValue()).GetDenseData <float>(paramValues[0]);
var b1_name = paramValues[1].Name;
var b1 = new Value(paramValues[1].GetValue()).GetDenseData <float>(paramValues[1]);
Console.WriteLine($" ");
Console.WriteLine($"Training process finished with the following regression parameters:");
Console.WriteLine($"b={b0[0][0]}, w={b1[0][0]}");
b = b0[0][0];
w = b1[0][0];
ParameterStorage ps = new ParameterStorage(float.Parse(w.ToString()), float.Parse(b.ToString()));
int coaid = await dB.GetCountryByNameAsync(KnownValues.Where(k => k.Name != null).First().Name);
await dB.SaveParameterAsync(ps, coaid, KnownValues.Where(k => k.cat_id != 0).First().cat_id, loss);
Console.WriteLine(KnownValues.Min(k => k.Year));
KnownValues = Predict(KnownValues, Convert.ToInt32(KnownValues.Min(k => k.Year)), FutureYear, ps);
}
}
return(KnownValues);
}
