//EXAMPLE: http://accord-framework.net/docs/html/T_Accord_Statistics_Models_Regression_Linear_MultivariateLinearRegression.htm
static void Main(string[] args)
{
CSV_Parser parser = new CSV_Parser();
RegressionData data = parser.ParseDataFile();
// Use Ordinary Least Squares to create the regression
OrdinaryLeastSquares ols = new OrdinaryLeastSquares();
// Now, compute the multivariate linear regression:
MultivariateLinearRegression regression = ols.Learn(data.InterestRatings, data.MajorRatings);
// We can obtain predictions using
double[][] predictions = regression.Transform(data.InterestRatings);
// The prediction error is
double error = new SquareLoss(data.MajorRatings).Loss(predictions); // 0
// We can also check the r-squared coefficients of determination:
//double[] r2 = regression.CoefficientOfDetermination(topicRatings, majorRatings);
double[][] r2 = regression.Weights;
Console.WriteLine("WEIGHTS:");
//writeCSVfile(data, r2);
GenerateCSFile(data, r2);
Console.WriteLine("Coefficient Of Determination");
double[] r3 = regression.CoefficientOfDetermination(data.InterestRatings, data.MajorRatings);
for (int i = 0; i < r3.Length; i++)
{
Console.WriteLine(r3[i]);
}
Console.Read();
}
static private void GenerateCSFile(RegressionData data, double[][] r2)
{
const string OUTPUT_FILE = "\\Weights.cs";
StringBuilder CSfileContents = new StringBuilder(10000);
CSfileContents.Append(Environment.NewLine);
CSfileContents.Append("//Generated by TamuyalClassifier: https://github.com/Kaikat/TamuyalClassifier");
CSfileContents.Append(Environment.NewLine);
CSfileContents.Append("using System;");
CSfileContents.Append(Environment.NewLine);
CSfileContents.Append(Environment.NewLine);
CSfileContents.Append("namespace WebApplication1.Controllers");
CSfileContents.Append(Environment.NewLine);
CSfileContents.Append("{");
CSfileContents.Append(Environment.NewLine);
CSfileContents.Append("\tpublic static class Weights");
CSfileContents.Append(Environment.NewLine);
CSfileContents.Append("\t{");
CSfileContents.Append(Environment.NewLine);
CSfileContents.Append("\t\tpublic static readonly double[][] Matrix =");
CSfileContents.Append(Environment.NewLine);
CSfileContents.Append("\t\t{");
CSfileContents.Append(Environment.NewLine);
//append matrix values
string textForFile = "";
List <Interest> interestInCodeOrder = Enum.GetValues(typeof(Interest)).OfType <Interest>().ToList();
List <Major> majorsInCodeOrder = Enum.GetValues(typeof(Major)).OfType <Major>().ToList();
for (int i = 0; i < interestInCodeOrder.Count; i++) //topics
{
textForFile += "\t\t\tnew double[] { ";
for (int j = 0; j < majorsInCodeOrder.Count; j++) //majors
{
if (j % 4 == 0)
{
textForFile += Environment.NewLine + "\t\t\t\t";
}
int indexI = data.InterestOrder.IndexOf(interestInCodeOrder[i]);
int indexJ = data.MajorOrder.IndexOf(majorsInCodeOrder[j]);
textForFile += j == r2[i].Length - 1 ? r2[indexI][indexJ].ToString() : r2[indexI][indexJ].ToString() + ", ";
}
textForFile += i == r2.Length - 1 ? Environment.NewLine + "\t\t\t}" : Environment.NewLine + "\t\t\t},";
textForFile += Environment.NewLine;
}
CSfileContents.Append(textForFile);
CSfileContents.Append("\t\t};");
CSfileContents.Append(Environment.NewLine);
CSfileContents.Append("\t};");
CSfileContents.Append(Environment.NewLine);
CSfileContents.Append("};");
File.WriteAllText(Directory.GetParent(Directory.GetCurrentDirectory()).Parent.FullName +
OUTPUT_FILE, CSfileContents.ToString());
}
static private void writeCSVfile(RegressionData data, double[][] r2)
{
const string OUTPUT_FILE = "WeightMatrix.csv";
string textForFile = "";
for (int i = 0; i < data.InterestOrder.Count; i++)
{
textForFile += i == data.InterestOrder.Count - 1 ? data.InterestOrder[i].ToString() + Environment.NewLine : data.InterestOrder[i].ToString() + ", ";
}
for (int i = 0; i < data.MajorOrder.Count; i++)
{
textForFile += i == data.MajorOrder.Count - 1 ? data.MajorOrder[i].ToString() + Environment.NewLine : data.MajorOrder[i].ToString() + ", ";
}
for (int i = 0; i < r2.Length; i++)
{
for (int j = 0; j < r2[i].Length; j++)
{
textForFile += j == r2[i].Length - 1 ? r2[i][j].ToString() : r2[i][j].ToString() + ", ";
}
textForFile += Environment.NewLine;
}
File.WriteAllText(Directory.GetParent(Directory.GetCurrentDirectory()).Parent.FullName + OUTPUT_FILE, textForFile);
}
