static void Main(string[] args)
{
string filename = @"..\..\mag.txt";
int i;
// load measurement data
Matrix <double> data = DelimitedReader.Read <double>(filename, false, "\t", false);
// create D 10xnumdata
Matrix <double> D = Matrix <double> .Build.Dense(10, data.RowCount);
for (i = 0; i < data.RowCount; i++)
{
D[0, i] = data[i, 0] * data[i, 0];
D[1, i] = data[i, 1] * data[i, 1];
D[2, i] = data[i, 2] * data[i, 2];
D[3, i] = 2.0 * data[i, 1] * data[i, 2];
D[4, i] = 2.0 * data[i, 0] * data[i, 2];
D[5, i] = 2.0 * data[i, 0] * data[i, 1];
D[6, i] = 2.0 * data[i, 0];
D[7, i] = 2.0 * data[i, 1];
D[8, i] = 2.0 * data[i, 2];
D[9, i] = 1.0;
}
// create S 10x10
Matrix <double> S = D * D.Transpose();
// create sub matrices of S
//
// - -
// S = | S11(6x6) S12(6x4) |
// | S12_t(4x6) S22(4x4) |
// - -
//
// create S11 6x6
Matrix <double> S11 = Matrix <double> .Build.Dense(6, 6);
S11.SetSubMatrix(0, 0, 6, 0, 0, 6, S);
// create S12 6x4
Matrix <double> S12 = Matrix <double> .Build.Dense(6, 4);
S12.SetSubMatrix(0, 0, 6, 0, 6, 4, S);
// create S12t 4x6
Matrix <double> S12t = Matrix <double> .Build.Dense(4, 6);
S12t.SetSubMatrix(0, 6, 4, 0, 0, 6, S);
// create S22 4x4
Matrix <double> S22 = Matrix <double> .Build.Dense(4, 4);
S22.SetSubMatrix(0, 6, 4, 0, 6, 4, S);
// calculate pseudo inverse of S22
Matrix <double> S22_1 = S22.PseudoInverse();
// calculate SS = S11 - S12 * S22_1 * S12t
Matrix <double> SS = S11 - S12 * S22_1 * S12t;
// Create constraint matrix C
Matrix <double> Co = Matrix <double> .Build.DenseOfArray(new double[, ] {
{ -1.0, 1.0, 1.0, 0.0, 0.0, 0.0 },
{ 1.0, -1.0, 1.0, 0.0, 0.0, 0.0 },
{ 1.0, 1.0, -1.0, 0.0, 0.0, 0.0 },
{ 0.0, 0.0, 0.0, -4.0, 0.0, 0.0 },
{ 0.0, 0.0, 0.0, 0.0, -4.0, 0.0 },
{ 0.0, 0.0, 0.0, 0.0, 0.0, -4.0 }
});
Matrix <double> C = Co.Inverse();
// Calculate E = C * SS
Matrix <double> E = C * SS;
// calculate eigenvalues wr(6x1) and eigenvectors vr(6x6) of matrix E
Evd <double> eigen = E.Evd();
Vector <Complex> wr = eigen.EigenValues;
Matrix <double> vr = eigen.EigenVectors;
// find the zero based position of the only positive eigenvalue. The associated eigenvector will be in the corresponding column of matrix vr
int index = 0;
double maxval = wr[0].Real;
for (i = 1; i < 6; i++)
{
if (wr[i].Real > maxval)
{
maxval = wr[i].Real;
index = i;
}
}
// Extract the associated eigenvector v1
Vector <double> v1 = vr.Column(index);
// check sign of eigenvector v1
if (v1[0] < 0.0)
{
v1[0] = -v1[0];
v1[1] = -v1[1];
v1[2] = -v1[2];
v1[3] = -v1[3];
v1[4] = -v1[4];
v1[5] = -v1[5];
}
// Calculate v2 = S22a * v1
Vector <double> v2 = (S22_1 * S12t) * v1;
// calculate v
Vector <double> v = Vector <double> .Build.Dense(10);
v[0] = v1[0];
v[1] = v1[1];
v[2] = v1[2];
v[3] = v1[3];
v[4] = v1[4];
v[5] = v1[5];
v[6] = -v2[0];
v[7] = -v2[1];
v[8] = -v2[2];
v[9] = -v2[3];
//At this point, we have found the general equation of the fitted ellipsoid:
// Ax² + By² + Cz² + 2Dxy + 2Exz + 2Fyz + 2Gx + 2Hg + 2Iz + J = 0
// where:
// A = v[0] - term in x2
// B = v[1] - term in y2
// C = v[2] - term in z2
// D = v[5] - term in xy
// E = v[4] - term in xz
// F = v[3] - term in yz
// G = v[6] - term in x
// H = v[7] - term in y
// I = v[8] - term in z
// J = v[9] - constant term
// If we define
// - - - -
// | A D E | | G |
// Q = | D B F | U = | H |
// | E F C | | I |
// - - - -
//
// then the center of the ellipsoid can be calculated as the vector B = -Qˉ¹ * U.
// The center of the ellipsoid represents the combined bias.
Matrix <double> Q = Matrix <double> .Build.Dense(3, 3);
Q[0, 0] = v[0]; // A
Q[0, 1] = v[5]; // D
Q[0, 2] = v[4]; // E
Q[1, 0] = v[5]; // D
Q[1, 1] = v[1]; // B
Q[1, 2] = v[3]; // F
Q[2, 0] = v[4]; // E
Q[2, 1] = v[3]; // F
Q[2, 2] = v[2]; // C
Vector <double> U = Vector <double> .Build.Dense(3);
U[0] = v[6]; // G
U[1] = v[7]; // H
U[2] = v[8]; // I
// Calculate matrix Q_1, the inverse of matrix Q
Matrix <double> Q_1 = Q.Inverse();
// Calculate B = Q_1 * U ( 3x1 = 3x3 * 3x1)
Vector <double> B = Q_1 * U;
// Calculate combined bias
B[0] = -B[0]; // x-axis combined bias
B[1] = -B[1]; // y-axis combined bias
B[2] = -B[2]; // z-axis combined bias
Console.WriteLine("Combined bias:");
Console.WriteLine(B.ToString());
// -1
// Calculate A
//
// -1 Hm 1/2
// A = -------------------- * Q
// sqrt(Bt * Q * B - J)
// Calculate btqb = BT * Q * B
double btqb = B * Q * B;
// Calculate hmb = sqrt(btqb - J).
double J = v[9];
double hmb = Math.Sqrt(btqb - J);
// Calculate SQ, the square root of matrix Q
eigen = Q.Evd();
wr = eigen.EigenValues;
vr = eigen.EigenVectors;
// normalize eigenvectors
double norm1 = Math.Sqrt(vr[0, 0] * vr[0, 0] + vr[0, 1] * vr[0, 1] + vr[0, 2] * vr[0, 2]);
vr[0, 0] /= norm1;
vr[0, 1] /= norm1;
vr[0, 2] /= norm1;
double norm2 = Math.Sqrt(vr[1, 0] * vr[1, 0] + vr[1, 1] * vr[1, 1] + vr[1, 2] * vr[1, 2]);
vr[1, 0] /= norm2;
vr[1, 1] /= norm2;
vr[1, 2] /= norm2;
double norm3 = Math.Sqrt(vr[2, 0] * vr[2, 0] + vr[2, 1] * vr[2, 1] + vr[2, 2] * vr[2, 2]);
vr[2, 0] /= norm3;
vr[2, 1] /= norm3;
vr[2, 2] /= norm3;
Matrix <double> Dz = Matrix <double> .Build.Dense(3, 3);
Dz[0, 0] = Math.Sqrt(wr[0].Real);
Dz[1, 1] = Math.Sqrt(wr[1].Real);
Dz[2, 2] = Math.Sqrt(wr[2].Real);
Matrix <double> SQ = (vr * Dz) * vr.Transpose();
double hm = 0.569;
Matrix <double> A_1 = SQ * hm / hmb;
Console.WriteLine("A-1 matrix:");
Console.WriteLine(A_1.ToString());
// Calculate A to permit comparison with MagCal
Matrix <double> A = A_1.Inverse();
Console.WriteLine("A matrix:");
Console.WriteLine(A.ToString());
}
static void Main(string[] args)
{
// Initializations
double alpha = .01; // Alpha values to try .001, .003, .01, .03, .1, .3, 1
double Lambda = 10;
int iterations = 1500;
string ThetaFile = "Thetasave.csv";
if (args.Length < 2)
{
Console.WriteLine(mystrings.usage);
System.Environment.Exit(-1);
}
if (!File.Exists(args[0]))
{
Console.WriteLine("Training file {0} not found!", args[0]);
System.Environment.Exit(-1);
}
if (!File.Exists(args[1]))
{
Console.WriteLine("Label file {0} not found!", args[1]);
System.Environment.Exit(-1);
}
if (args.Length > 2 && File.Exists(args[2]))
{
alpha = Convert.ToDouble(args[2]);;
}
else
{
Console.WriteLine("Using default alpha {0}", alpha);
}
string trainingfile = args[0];
string labelfile = args[1];
// maybe add check for csv format??
/*
* Delimited Reader Param description
* Delimited Reader (only Single, Double, Complex and COmplex32)
* second param Sparse (True) or dense matrix (false)
* THird Param = delimeter
* Fourth has headers (T|F)
*/
Matrix <double> input = DelimitedReader.Read <double>(trainingfile, false, ",", false);
Matrix <double> labels = DelimitedReader.Read <double>(labelfile, false, "'", false);
if ((labels.RowCount != input.RowCount))
{
Console.WriteLine(mystrings.SamplesDontMatch, labels.RowCount, input.RowCount);
}
int rows = input.RowCount;
int cols = input.ColumnCount;
Console.WriteLine("Training Set rows = {0}, Columns = {1}", rows, cols);
Console.WriteLine("Lable set rows = {0}, Columns = {1}", labels.RowCount, labels.ColumnCount);
// Initial guess for Theta is all zeros and n x 1 vector of zeros, where n is the number of features (columns)
Matrix <double> init_theta = Matrix <double> .Build.Dense(cols, 1);
Matrix <double> ones_theta = Matrix <double> .Build.Dense(cols, 1, 1);
Console.WriteLine(mystrings.running, iterations);
/* Investigate using ILNumerics unconstrained optimizaiton code, otherwise will need
* to write a gradient descent routine. https://ilnumerics.net/unconstrained-optimization.html
*
*/
Matrix <double> theta = Functions.utilityfunctions.GradientDescent(input, labels, init_theta, alpha, iterations, Lambda);
/* StreamWriter checkthis;
* try
* {
* checkthis = new StreamWriter("LearnedTheta.csv");
* checkthis.Close();
* }
* catch (IOException)
* {
* Console.WriteLine("Oopsie");
* } */
if (!utilityfunctions.FileOpen(ThetaFile))
{
Console.WriteLine(mystrings.File_in_use, ThetaFile);
System.Environment.Exit(-1);
}
else
{
DelimitedWriter.Write(ThetaFile, theta, ",");
}
}
public void CanParseMissingDataCommaDelimitedData()
{
var data = "a,b,c" + Environment.NewLine
+ ", , , ," + Environment.NewLine
+ "\"2.2\", , ,0.3e1" + Environment.NewLine
+ "'4',0,6" + Environment.NewLine
+ "," + Environment.NewLine
+ ",,3, 4" + Environment.NewLine
+ ",, , ,," + Environment.NewLine
+ ",,,,," + Environment.NewLine
+ ", ,,, ," + Environment.NewLine
+ ", , , ,," + Environment.NewLine;
var matrix = DelimitedReader.Read <double>(new StringReader(data), false, ",", true, CultureInfo.InvariantCulture);
Assert.AreEqual(9, matrix.RowCount);
Assert.AreEqual(5, matrix.ColumnCount);
Assert.AreEqual(double.NaN, matrix[0, 0]);
Assert.AreEqual(double.NaN, matrix[0, 1]);
Assert.AreEqual(double.NaN, matrix[0, 2]);
Assert.AreEqual(double.NaN, matrix[0, 3]);
Assert.AreEqual(double.NaN, matrix[0, 4]);
Assert.AreEqual(2.2, matrix[1, 0]);
Assert.AreEqual(double.NaN, matrix[1, 1]);
Assert.AreEqual(double.NaN, matrix[1, 2]);
Assert.AreEqual(3.0, matrix[1, 3]);
Assert.AreEqual(double.NaN, matrix[1, 4]);
Assert.AreEqual(4.0, matrix[2, 0]);
Assert.AreEqual(0.0, matrix[2, 1]);
Assert.AreEqual(6.0, matrix[2, 2]);
Assert.AreEqual(double.NaN, matrix[2, 3]);
Assert.AreEqual(double.NaN, matrix[2, 4]);
Assert.AreEqual(double.NaN, matrix[3, 0]);
Assert.AreEqual(double.NaN, matrix[3, 1]);
Assert.AreEqual(double.NaN, matrix[3, 2]);
Assert.AreEqual(double.NaN, matrix[3, 3]);
Assert.AreEqual(double.NaN, matrix[3, 4]);
Assert.AreEqual(double.NaN, matrix[4, 0]);
Assert.AreEqual(double.NaN, matrix[4, 1]);
Assert.AreEqual(3.0, matrix[4, 2]);
Assert.AreEqual(4.0, matrix[4, 3]);
Assert.AreEqual(double.NaN, matrix[4, 4]);
Assert.AreEqual(double.NaN, matrix[5, 0]);
Assert.AreEqual(double.NaN, matrix[5, 1]);
Assert.AreEqual(double.NaN, matrix[5, 2]);
Assert.AreEqual(double.NaN, matrix[5, 3]);
Assert.AreEqual(double.NaN, matrix[5, 4]);
Assert.AreEqual(double.NaN, matrix[6, 0]);
Assert.AreEqual(double.NaN, matrix[6, 1]);
Assert.AreEqual(double.NaN, matrix[6, 2]);
Assert.AreEqual(double.NaN, matrix[6, 3]);
Assert.AreEqual(double.NaN, matrix[6, 4]);
Assert.AreEqual(double.NaN, matrix[7, 0]);
Assert.AreEqual(double.NaN, matrix[7, 1]);
Assert.AreEqual(double.NaN, matrix[7, 2]);
Assert.AreEqual(double.NaN, matrix[7, 3]);
Assert.AreEqual(double.NaN, matrix[7, 4]);
Assert.AreEqual(double.NaN, matrix[8, 0]);
Assert.AreEqual(double.NaN, matrix[8, 1]);
Assert.AreEqual(double.NaN, matrix[8, 2]);
Assert.AreEqual(double.NaN, matrix[8, 3]);
Assert.AreEqual(double.NaN, matrix[8, 4]);
}
static void Main(string[] args)
{
CultureInfo customCulture = (CultureInfo)System.Threading.Thread.CurrentThread.CurrentCulture.Clone();
customCulture.NumberFormat.NumberDecimalSeparator = ".";
System.Threading.Thread.CurrentThread.CurrentCulture = customCulture;
/*
* Tinker();
* Console.ReadLine();
* Environment.Exit(0);
*/
NetworkModel model = null;
bool teaching = false;
int epochRuns = 1;
int repeats = 1;
string inputFile = null;
CommandLine.Parser.Default.ParseArguments <Options>(args)
.WithParsed <Options>(opts =>
{
teaching = opts.Teaching;
epochRuns = opts.EpochRuns;
repeats = opts.Repeats;
Debug = opts.Debug;
#if !DEBUG
try
{
#endif
model = NetworkModel.Load(opts.Model);
inputFile = model.Path(opts.Input);
#if !DEBUG
Console.Clear();
}
catch (Exception e)
{
Console.WriteLine(e.Message);
Environment.Exit(1);
}
#endif
});
if (model is null)
{
Environment.Exit(0);
}
if (teaching)
{
Console.WriteLine("Launching model in teaching mode");
// Save newly generated model.
if (!model.Loaded)
{
model.Save();
}
var plotModel = new PlotModel {
Title = String.Format("{0} model \"{1}\" learning graph", model.Config.Type, model.Name)
};
var series = new OxyPlot.Series.LineSeries();
try
{
var graphMatrix = DelimitedReader.Read <double>(model.Path("graph"));
for (int i = 0; i < graphMatrix.RowCount; i++)
{
series.Points.Add(new DataPoint(i + 1, graphMatrix.Row(i).At(0)));
}
}
catch { }
plotModel.Series.Add(series);
plotModel.Axes.Add(new OxyPlot.Axes.LinearAxis
{
Minimum = 1,
Position = OxyPlot.Axes.AxisPosition.Bottom,
Title = "Epochs",
});
plotModel.Axes.Add(new OxyPlot.Axes.LinearAxis
{
Position = OxyPlot.Axes.AxisPosition.Left,
Title = "Cost",
});
var epochOffset = series.Points.Count;
var epoch = epochOffset;
var epochRunStep = epochRuns;
var stopwatch = new Stopwatch();
var epochStopwatch = new Stopwatch();
bool forceStop = false;
stopwatch.Restart();
var repeat = 1;
while (epochRuns == 0 || epoch < epochRuns + epochOffset)
{
Console.Write("\nepoch {0} / {1}...", ++epoch, epochOffset + epochRuns);
var previous = model.GetInfo();
epochStopwatch.Restart();
stopwatch.Start();
var cost = model.RunEpoch();
stopwatch.Stop();
Console.Write(" {0:f2} + {1:f2}s,", stopwatch.Elapsed.TotalSeconds, epochStopwatch.Elapsed.TotalSeconds);
Console.Write(" cost {0}", cost);
series.Points.Add(new DataPoint(epoch, cost));
if (model.Config.Threshold != null && Math.Abs(cost) <= model.Config.Threshold)
{
Console.WriteLine("\nError threshold ({0}) reached. Finished learning.", model.Config.Threshold);
forceStop = true;
}
if (epochRuns == 0 || epoch >= epochRuns + epochOffset || forceStop)
{
forceStop = false;
epochRuns += epochRunStep;
var pngExporter = new PngExporter();
pngExporter.ExportToFile(plotModel, model.Path("learning-graph.png"));
if (repeat++ >= repeats)
{
DisplayActions(model, series);
}
else
{
SaveModel(model, series);
}
}
}
}
else
{
if (model.DataTransformer is Model.Transformers.VectorDataTransformer)
{
Console.WriteLine("Running execution loop\n");
while (true)
{
Console.WriteLine("Model info:");
Console.WriteLine("===========");
Console.WriteLine(model.GetInfo());
DisplayActions(model);
var inputs = Vector <double> .Build.Dense(model.Config.Inputs);
for (int i = 0; i < model.Config.Inputs; i++)
{
inputs[i] = ReadDouble(String.Format("Input[{0}]", i));
}
Console.Clear();
Console.WriteLine("Inputs:");
Console.WriteLine("=======");
Console.WriteLine(inputs.ToVectorString());
Console.WriteLine("Result:");
Console.WriteLine("=======");
foreach (var label in model.Run(inputs))
{
Console.WriteLine(label);
}
Console.WriteLine();
}
}
else if (model.DataTransformer is Model.Transformers.MnistDataTransformer)
{
if (!File.Exists(inputFile))
{
Console.WriteLine("Input file '{0}' doesn't exist", inputFile);
Environment.Exit(1);
}
var inputs = model.InputTransformer.Transform(inputFile).Row(0);
foreach (var label in model.Run(inputs))
{
Console.WriteLine(label);
}
}
else
{
Console.WriteLine("Unsupported model input transformer '{0}'.", model.DataTransformer);
Environment.Exit(1);
}
}
}
static void Main(string[] args)
{
if (!System.Console.IsOutputRedirected)
{
System.Console.Clear();
}
CultureInfo.CurrentCulture = CultureInfo.CreateSpecificCulture("en-US");
System.Console.WriteLine("Logistic Regression ex.2");
System.Console.WriteLine("========================\n");
var M = Matrix <double> .Build;
var V = Vector <double> .Build;
// Load Data
// The first two columns contains the exam scores and the third column
// contains the label.
Matrix <double> data = DelimitedReader.Read <double>("data\\ex2data1.txt", false, ",", false);
Console.WriteLine(data);
Matrix <double> X = data.SubMatrix(0, data.RowCount, 0, 2);
Vector <double> y = data.Column(2);
System.Console.WriteLine("Features:\n");
System.Console.WriteLine(X);
System.Console.WriteLine("Label:\n");
System.Console.WriteLine(y);
// ==================== Part 1: Plotting ====================
// We start the exercise by first plotting the data to understand the
// the problem we are working with.
System.Console.WriteLine("Plotting data with + indicating (y = 1) examples and o indicating (y = 0) examples.\n");
PlotData(X, y);
GnuPlot.HoldOff();
Pause();
// theta parameters
Vector <double> initial_theta = V.Dense(X.ColumnCount + 1);
// Add intercept term to X
X = X.InsertColumn(0, V.Dense(X.RowCount, 1));
// compute cost
LogisticRegression lr = new LogisticRegression(X, y);
double J = lr.Cost(initial_theta);
Vector <double> grad = lr.Gradient(initial_theta);
System.Console.WriteLine("Cost at initial theta (zeros): {0:f3}\n", J);
System.Console.WriteLine("Expected cost (approx): 0.693\n");
System.Console.WriteLine("Gradient at initial theta (zeros): \n");
System.Console.WriteLine(" {0:f4} \n", grad);
System.Console.WriteLine("Expected gradients (approx):\n -0.1000\n -12.0092\n -11.2628\n");
// Compute and display cost and gradient with non-zero theta
Vector <double> test_theta = V.DenseOfArray(new double[] { -24.0, 0.2, 0.2 });
J = lr.Cost(test_theta);
grad = lr.Gradient(test_theta);
System.Console.WriteLine("\nCost at test theta: {0:f3}\n", J);
System.Console.WriteLine("Expected cost (approx): 0.218\n");
System.Console.WriteLine("Gradient at test theta: \n");
System.Console.WriteLine(" {0:f3} \n", grad);
System.Console.WriteLine("Expected gradients (approx):\n 0.043\n 2.566\n 2.647\n");
Pause();
// ============= Part 3: Optimizing using fmin ================
// In this exercise, I will use fmin function to find the
// optimal parameters theta.
var obj = ObjectiveFunction.Gradient(lr.Cost, lr.Gradient);
var solver = new BfgsMinimizer(1e-5, 1e-5, 1e-5, 1000);
var result = solver.FindMinimum(obj, initial_theta);
System.Console.WriteLine("Cost at theta found by fmin: {0:f5} after {1} iterations\n", result.FunctionInfoAtMinimum.Value, result.Iterations);
System.Console.WriteLine("Expected cost (approx): 0.203\n");
System.Console.WriteLine("theta: \n");
System.Console.WriteLine(result.MinimizingPoint);
System.Console.WriteLine("Expected theta (approx):\n");
System.Console.WriteLine(" -25.161\n 0.206\n 0.201\n");
Pause();
PlotLinearBoundary(X, y, result.MinimizingPoint);
GnuPlot.HoldOff();
// ============== Part 4: Predict and Accuracies ==============
// After learning the parameters, you'll like to use it to predict the outcomes
// on unseen data. In this part, you will use the logistic regression model
// to predict the probability that a student with score 45 on exam 1 and
// score 85 on exam 2 will be admitted.
//
// Furthermore, you will compute the training and test set accuracies of
// our model.
//
// Your task is to complete the code in predict.m
// Predict probability for a student with score 45 on exam 1
// and score 85 on exam 2
double prob = LogisticRegression.Predict(V.DenseOfArray(new [] { 1.0, 45.0, 85.0 }), result.MinimizingPoint);
System.Console.WriteLine("For a student with scores 45 and 85, we predict an admission probability of {0:f5}\n", prob);
System.Console.WriteLine("Expected value: 0.775 +/- 0.002\n\n");
Pause();
// Compute accuracy on our training set
Vector <double> pos = LogisticRegression.Predict(X, result.MinimizingPoint);
Func <double, double> map = delegate(double d){
if (d >= 0.5)
{
return(1);
}
else
{
return(0);
}
};
pos = pos.Map(map);
Vector <double> comp = V.Dense(y.Count);
for (int i = 0; i < y.Count; i++)
{
if (pos[i] == y[i])
{
comp[i] = 1;
}
else
{
comp[i] = 0;
}
}
double accurancy = comp.Mean() * 100;
System.Console.WriteLine("Train Accuracy: {0:f5}\n", accurancy);
System.Console.WriteLine("Expected accuracy (approx): 89.0\n");
System.Console.WriteLine("\n");
}
static void Main(string[] args)
{
if (!System.Console.IsOutputRedirected)
{
System.Console.Clear();
}
CultureInfo.CurrentCulture = CultureInfo.CreateSpecificCulture("en-US");
System.Console.WriteLine("Linear Regression ex.1");
System.Console.WriteLine("======================\n");
// ==================== Part 1: Basic Function ====================
var M = Matrix <double> .Build;
var V = Vector <double> .Build;
// load data
Matrix <double> data = DelimitedReader.Read <double>("data\\ex1data1.txt", false, ",", false);
Console.WriteLine(data);
Matrix <double> X = data.Column(0).ToColumnMatrix();
Matrix <double> y = data.Column(1).ToColumnMatrix();
int m = X.RowCount;
// ======================= Part 2: Plotting =======================
System.Console.WriteLine("Plotting data....");
GnuPlot.HoldOn();
PlotData(X.Column(0).ToArray(), y.Column(0).ToArray());
Pause();
// =================== Part 3: Cost and Gradient descent ===================
System.Console.WriteLine("Cost and Gradient descent....");
// Add a column of ones to X
X = X.InsertColumn(0, V.Dense(m, 1));
System.Console.WriteLine(X);
// initialize fitting parameters
Matrix <double> theta = M.Dense(2, 1);
double J = ComputeCost(X, y, theta);
System.Console.WriteLine("With theta = [0 ; 0]\nCost computed = {0:f}\n", J);
System.Console.WriteLine("Expected cost value (approx) 32.07\n");
// initialize fitting parameters
theta[0, 0] = -1; theta[1, 0] = 2;
J = ComputeCost(X, y, theta);
System.Console.WriteLine("With theta = [-1 ; 2]\nCost computed = {0:f}\n", J);
System.Console.WriteLine("Expected cost value (approx) 54.24\n");
// run gradient descent
System.Console.WriteLine("\nRunning Gradient Descent ...\n");
int iterations = 1500;
double alpha = 0.01;
theta = M.Dense(2, 1);
(Matrix <double> theta, Matrix <double> J_history)res;
res = GradientDescent(X, y, theta, alpha, iterations);
theta = res.theta;
// print theta to screen
System.Console.WriteLine("Theta found by gradient descent:\n");
System.Console.WriteLine(theta);
System.Console.WriteLine("Expected theta values (approx)\n");
System.Console.WriteLine(" -3.6303\n 1.1664\n\n");
Matrix <double> h = X * theta; // hypothesys
Matrix <double> x = X.RemoveColumn(0); // remove x0
PlotLinearFit(x.Column(0).ToArray(), h.Column(0).ToArray());
GnuPlot.HoldOff();
var predict1 = M.DenseOfArray(new double[, ] {
{ 1, 3.5 }
}) * theta;
System.Console.WriteLine("For population = 35,000, we predict a profit of {0:F4}", predict1[0, 0] * 10000);
var predict2 = M.DenseOfArray(new double[, ] {
{ 1, 7 }
}) * theta;
System.Console.WriteLine("For population = 70,000, we predict a profit of {0:F4}", predict2[0, 0] * 10000);
Pause();
// ============= Part 4: Visualizing J(theta_0, theta_1) =============
System.Console.WriteLine("Visualizing J(theta_0, theta_1) ...\n");
PlotJ(X, y, theta);
Pause();
}
static void Main1(string[] args)
{
//initialize the translation matrix
Matrix <double> transMatrix = DelimitedReader.Read <double>(@"C:\Mannheim Uni\New folder\m.csv", false, ",", false);
//initialize the vocabulary index dictionary
Wordindenx();
//initialize the word embedding vector
var dv = dicVic();
Console.WriteLine("dictionay vec loaded");
//declare a dictionary for the documents embeddings
Dictionary <int, Vector <double> > docEm = new Dictionary <int, Vector <double> >();
//declare a indexer
int i = 0;
//declare a variable for the weights' sum
double WeightSum = 0;
//declare a vector for the sum of the word vector embeddings
Vector <double> vecSum = Vector.Build.Dense(300);
//loop for read the dataset in English
foreach (var line in File.ReadLines(@"C:\Mannheim Uni\New folder\train_en.txt"))
{
if (Convert.ToInt32(line.Split()[0]) == i)
{
if (dv.ContainsKey(wIndexer[line.Split()[1]]))
{
//Obtain the word embedding
Vector <double> V = dv[wIndexer[line.Split()[1]]];
//multiply the Vector with the translation matrix
V = V * transMatrix;
//multiply the Vector with the word weight
V = V * Convert.ToDouble(line.Split()[2]);
//aggregate the vectors
vecSum += V;
WeightSum += Convert.ToDouble(line.Split()[2]);
}
}
else
{
//aggregate the vectors and divide them on the weights sum
vecSum = vecSum / WeightSum;
// add the final document embedding vector to the dictionary
docEm.Add(i, vecSum);
WeightSum = 0;
vecSum = 0 * vecSum;
Console.WriteLine(i);
i++;
}
}
Console.WriteLine("done");
//write the final document embadding in excel file
using (StreamWriter file = new StreamWriter(@"C:\Mannheim Uni\New folder\test - Copy.csv"))
{
foreach (var item in docEm)
{
file.Write(item.Key + "," + string.Join(" ", item.Value.ToArray()));
file.Write(Environment.NewLine);
}
}
Console.WriteLine("Press any key to exit");
Console.ReadKey();
}
private void button1_Click(object sender, EventArgs e)
{
// Read first file
string fileOne = "matrixone.csv";
Matrix <double> fileMatrixOne = DelimitedReader.Read <double>(fileOne, false, ",", false);
// Write in textBox1 the information about fileMatrixOne
textBox1.AppendText("\n");
textBox1.AppendText(fileMatrixOne.ToString("F2"));
textBox1.AppendText("matrix1 rows: " + fileMatrixOne.RowCount.ToString("F2"));
textBox1.AppendText("\n");
textBox1.AppendText("matrix1 columns: " + fileMatrixOne.ColumnCount.ToString("F2"));
textBox1.AppendText("\n");
// FirstCSV file into a multidimensional array
// string[][] numOne = File.ReadLines(@"C:\Users\PC\Desktop\matrix1.csv").Select(s => s.Split(",".ToCharArray())).ToArray().ToArray();
// textBox1.AppendText("stringOne : " + numOne[1][0]);
// Read second file
string fileTwo = "matrixtwo.csv";
Matrix <double> fileMatrixTwo = DelimitedReader.Read <double>(fileTwo, false, ",", false);
// Write in textBox1 the information about fileMatrixTwo
textBox1.AppendText("\n");
textBox1.AppendText(fileMatrixTwo.ToString("F2"));
textBox1.AppendText("matrix2 rows: " + fileMatrixTwo.RowCount.ToString("F2"));
textBox1.AppendText("\n");
textBox1.AppendText("matrix2 columns: " + fileMatrixTwo.ColumnCount.ToString("F2"));
textBox1.AppendText("\n");
// FirstCSV file into a multidimensional array
// string[][] numTwo = File.ReadLines(@"C:\Users\PC\Desktop\matrix2.csv").Select(s => s.Split(",".ToCharArray())).ToArray().ToArray();
// textBox1.AppendText("stringOne : " + numTwo[1][0]);
if (fileMatrixTwo.RowCount == fileMatrixOne.RowCount && fileMatrixOne.ColumnCount == fileMatrixTwo.ColumnCount)
{
//TASK ONE
textBox1.AppendText("\n");
textBox1.AppendText("\nTASK ONE");
Matrix <double> resultSum = DelimitedReader.Read <double>(fileTwo, false, ",", false);
resultSum.Add(fileMatrixOne, resultSum);
textBox1.AppendText("\n");
textBox1.AppendText("Sumation:");
textBox1.AppendText(resultSum.ToString("F2"));
double[,] resultArray = new double[resultSum.RowCount, resultSum.ColumnCount];
//textBox1.AppendText(resultArray[1,1].ToString("F2"));
bool antisymmetrical = true;
// antisymmetrical matrix
if (fileMatrixOne.RowCount == fileMatrixOne.ColumnCount && fileMatrixTwo.RowCount == fileMatrixTwo.ColumnCount)
{
for (int i = 0; i < resultSum.ColumnCount; i++)
{
for (int j = 0; j < resultSum.RowCount; j++)
{
if (j != i)
{
//textBox1.AppendText("Symmetrical\n");
antisymmetrical = resultSum[j, i] != resultSum[i, j] ? true : false;
if (!antisymmetrical)
{
textBox1.AppendText("\n");
textBox1.AppendText("\nAntiSymmetrical:\n");
textBox1.AppendText("false\n");
i = resultSum.ColumnCount;
j = resultSum.RowCount;
}
}
}
}
if (antisymmetrical)
{
textBox1.AppendText("\n");
textBox1.AppendText("\nAntiSymmetrical: \n");
textBox1.AppendText("true\n");
}
}
else
{
textBox1.AppendText("\n");
textBox1.AppendText("\nAntiSymmetrical: \n");
textBox1.AppendText("false\n");
}
//TASK TWO
textBox1.AppendText("\n");
textBox1.AppendText("\nTASK TWO");
Matrix <double> resultMul = DelimitedReader.Read <double>(fileTwo, false, ",", false);
resultMul.Multiply(fileMatrixOne, resultMul);
textBox1.AppendText("\n");
textBox1.AppendText("Multiplication");
textBox1.AppendText(resultSum.ToString("F2"));
//double[,] resultArray = new double[resultMul.RowCount, resultMul.ColumnCount];
//textBox1.AppendText(resultArray[1,1].ToString("F2"));
bool symmetrical = true;
// antisymmetrical matrix
if (fileMatrixOne.RowCount == fileMatrixOne.ColumnCount && fileMatrixTwo.RowCount == fileMatrixTwo.ColumnCount)
{
for (int i = 0; i < resultSum.ColumnCount; i++)
{
for (int j = 0; j < resultSum.RowCount; j++)
{
if (j != i)
{
//textBox1.AppendText("Symmetrical\n");
symmetrical = resultSum[j, i] == resultSum[i, j] ? true : false;
if (!symmetrical)
{
textBox1.AppendText("\n");
textBox1.AppendText("\nSymmetrical:\n");
textBox1.AppendText("false\n");
i = resultSum.ColumnCount;
j = resultSum.RowCount;
}
}
}
}
if (symmetrical)
{
textBox1.AppendText("\n");
textBox1.AppendText("\nSymmetrical: \n");
textBox1.AppendText("true\n");
}
}
else
{
textBox1.AppendText("\n");
textBox1.AppendText("\nSymmetrical: \n");
textBox1.AppendText("false\n");
}
}
else
{
textBox1.AppendText("\n");
textBox1.AppendText("Undefined Matrices!");
}
//Matrix<Complex32> x = Matrix<Complex32>.Build.Dense(4, 4);
//textBox1.AppendText(x.ToString("F2"));
//Matrix<Complex32> y = Matrix<Complex32>.Build.Dense(4, 4, (i, j) => new Complex32(1.0f, 1.0f));
//textBox1.AppendText(y.ToString("F2"));
//x = y;
//y.CopyTo(x);
//x.Add(new Complex32(10.0f, 0), x);
//y.Multiply(new Complex32(2.0f, 0), n);
//textBox1.AppendText(n.ToString("F2"));
//textBox1.AppendText(x.ToString("F2"));
//textBox1.AppendText(y.ToString("F2"));
//textBox1.AppendText(y.Column(1).ToString("F2"));
//Vector<Complex32> z = y.ColumnSums();
//textBox1.AppendText(z.ToString("F2"));
}
static void Main(string[] args)
{
try
{
var gFile = @"C:\Users\alexismayfire\Desktop\CSM30\Trabalho 2\Imagem-A\g-1.txt";
var hFile = @"C:\Users\alexismayfire\Desktop\CSM30\Trabalho 2\Imagem-A\H-1.txt";
var M = Matrix <double> .Build;
var V = Vector <double> .Build;
int rows = 50816;
int columns = 3600;
StreamReader sr = new StreamReader(gFile);
try
{
Console.WriteLine(DateTime.Now);
double[] temp = new double[rows];
using (sr)
{
string line;
int i = 0;
while ((line = sr.ReadLine()) != null)
{
temp[i] = Double.Parse(line);
i++;
}
}
var v = V.Dense(temp);
Console.WriteLine("Arquivo g lido");
Console.WriteLine(DateTime.Now);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
Console.WriteLine(e.StackTrace);
}
sr.Dispose();
sr = new StreamReader(hFile);
try
{
Console.WriteLine(DateTime.Now);
Matrix <double> matrix = M.Sparse(rows, columns);
matrix = DelimitedReader.Read <double>(sr, false, ",", false, null, null);
Console.WriteLine("Arquivo H lido");
Console.WriteLine(DateTime.Now);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
Console.WriteLine(e.StackTrace);
}
sr.Dispose();
Console.Read();
}
catch (Exception e)
{
Console.WriteLine("The file could not be read:");
Console.WriteLine(e.Message);
}
}
static void Main(string[] args)
{
if (!System.Console.IsOutputRedirected)
{
System.Console.Clear();
}
CultureInfo.CurrentCulture = CultureInfo.CreateSpecificCulture("en-US");
var M = Matrix <double> .Build;
var V = Vector <double> .Build;
System.Console.WriteLine("Linear Regression ex.1 multiple variables");
System.Console.WriteLine("=========================================\n");
// load data
System.Console.WriteLine("Loading data ...\n");
Matrix <double> data = DelimitedReader.Read <double>("data\\ex1data2.txt", false, ",", false);
Matrix <double> X = data.SubMatrix(0, data.RowCount, 0, 2);
Matrix <double> y = data.SubMatrix(0, data.RowCount, 2, 1);
int m = X.RowCount;
// Print out some data points
System.Console.WriteLine("First 10 examples from the dataset: \n");
var temp = M.DenseOfMatrixArray(new [, ]
{
{
X.SubMatrix(0, 10, 0, 2), y.SubMatrix(0, 10, 0, 1)
}
}
);
Console.WriteLine(temp);
// Scale features and set them to zero mean
System.Console.WriteLine("Normalizing Features ...\n");
(Matrix <double> X_norm, Matrix <double> mu, Matrix <double> sigma)norm_res;
norm_res = FeatureNormalize(X);
System.Console.WriteLine($"mu: {norm_res.mu}");
System.Console.WriteLine($"sigma: {norm_res.sigma}");
System.Console.WriteLine($"X_norm: {norm_res.X_norm}");
// Add intercept term to X
X = norm_res.X_norm;
X = X.InsertColumn(0, V.Dense(X.RowCount, 1));
// Running gradient descent ...
System.Console.WriteLine("Running gradient descent ...\n");
// Choose some alpha value
double alpha = 0.01;
int num_iters = 50;
GnuPlot.HoldOn();
Matrix <double> theta = M.Dense(3, 1);
(Matrix <double> theta, Matrix <double> J_history)res_grad1 = GradientDescentMulti(X, y, theta, alpha, num_iters);
PlotJ(res_grad1.J_history, "{/Symbol a}=" + alpha, "blue");
theta = M.Dense(3, 1);
alpha = 0.03;
(Matrix <double> theta, Matrix <double> J_history)res_grad2 = GradientDescentMulti(X, y, theta, alpha, num_iters);
PlotJ(res_grad2.J_history, "{/Symbol a}=" + alpha, "red");
theta = M.Dense(3, 1);
alpha = 0.1;
(Matrix <double> theta, Matrix <double> J_history)res_grad3 = GradientDescentMulti(X, y, theta, alpha, num_iters);
PlotJ(res_grad3.J_history, "{/Symbol a}=" + alpha, "black");
theta = M.Dense(3, 1);
alpha = 0.3;
(Matrix <double> theta, Matrix <double> J_history)res_grad4 = GradientDescentMulti(X, y, theta, alpha, num_iters);
PlotJ(res_grad4.J_history, "{/Symbol a}=" + alpha, "green");
GnuPlot.HoldOff();
// Display gradient descent's result
System.Console.WriteLine("Theta computed from gradient descent: \n");
System.Console.WriteLine(res_grad4.theta);
System.Console.WriteLine("\n");
// Estimate the price of a 1650 sq-ft, 3 br house
// Recall that the first column of X is all-ones. Thus, it does
// not need to be normalized.
double x1 = 1650;
double x2 = 3;
x1 = (x1 - norm_res.mu[0, 0]) / norm_res.sigma[0, 0];
x2 = (x2 - norm_res.mu[0, 1]) / norm_res.sigma[0, 1];
Matrix <double> K = Matrix <double> .Build.DenseOfRowArrays(new double[] { 1, x1, x2 });
System.Console.WriteLine("K is:");
System.Console.WriteLine(K);
double price = (K * res_grad4.theta)[0, 0];
System.Console.WriteLine("Predicted price of a 1650 sq-ft, 3 br house (using gradient descent):\n ${0:f}\n", price);
Pause();
// =================================================================
// NORMAL EQUATION
// =================================================================
System.Console.WriteLine("Solving with normal equations...\n");
// load data
System.Console.WriteLine("Loading data ...\n");
data = DelimitedReader.Read <double>("data\\ex1data2.txt", false, ",", false);
X = data.SubMatrix(0, data.RowCount, 0, 2);
y = data.SubMatrix(0, data.RowCount, 2, 1);
m = X.RowCount;
// Add intercept term to X
X = X.InsertColumn(0, V.Dense(X.RowCount, 1));
// Calculate the parameters from the normal equation
theta = normalEqn(X, y);
System.Console.WriteLine("Theta computed from the normal equations: \n");
System.Console.WriteLine(theta);
System.Console.WriteLine("\n");
K = Matrix <double> .Build.DenseOfRowArrays(new double[] { 1, 1650, 3 });
price = (K * theta)[0, 0];
System.Console.WriteLine("Predicted price of a 1650 sq-ft, 3 br house (using normal equation):\n ${0:f}\n", price);
Pause();
}
