public void testWeightsAndBiasesUpdatedCorrectly() { Matrix weightMatrix1 = new Matrix(2, 1); weightMatrix1.Set(0, 0, -0.27); weightMatrix1.Set(1, 0, -0.41); Vector biasVector1 = new Vector(2); biasVector1.SetValue(0, -0.48); biasVector1.SetValue(1, -0.13); Layer layer1 = new Layer(weightMatrix1, biasVector1, new LogSigActivationFunction()); LayerSensitivity layer1Sensitivity = new LayerSensitivity(layer1); Vector inputVector1 = new Vector(1); inputVector1.SetValue(0, 1); layer1.FeedForward(inputVector1); Matrix weightMatrix2 = new Matrix(1, 2); weightMatrix2.Set(0, 0, 0.09); weightMatrix2.Set(0, 1, -0.17); Vector biasVector2 = new Vector(1); biasVector2.SetValue(0, 0.48); Layer layer2 = new Layer(weightMatrix2, biasVector2, new PureLinearActivationFunction()); Vector inputVector2 = layer1.GetLastActivationValues(); layer2.FeedForward(inputVector2); Vector errorVector = new Vector(1); errorVector.SetValue(0, 1.261); LayerSensitivity layer2Sensitivity = new LayerSensitivity(layer2); layer2Sensitivity.SensitivityMatrixFromErrorMatrix(errorVector); layer1Sensitivity .SensitivityMatrixFromSucceedingLayer(layer2Sensitivity); BackPropagationLearning.CalculateWeightUpdates(layer2Sensitivity, layer1.GetLastActivationValues(), 0.1); BackPropagationLearning.CalculateBiasUpdates(layer2Sensitivity, 0.1); BackPropagationLearning.CalculateWeightUpdates(layer1Sensitivity, inputVector1, 0.1); BackPropagationLearning.CalculateBiasUpdates(layer1Sensitivity, 0.1); layer2.UpdateWeights(); Matrix newWeightMatrix2 = layer2.GetWeightMatrix(); Assert.AreEqual(0.171, newWeightMatrix2.Get(0, 0), 0.001); Assert.AreEqual(-0.0772, newWeightMatrix2.Get(0, 1), 0.001); layer2.UpdateBiases(); Vector newBiasVector2 = layer2.GetBiasVector(); Assert.AreEqual(0.7322, newBiasVector2.GetValue(0), 0.00001); layer1.UpdateWeights(); Matrix newWeightMatrix1 = layer1.GetWeightMatrix(); Assert.AreEqual(-0.265, newWeightMatrix1.Get(0, 0), 0.001); Assert.AreEqual(-0.419, newWeightMatrix1.Get(1, 0), 0.001); layer1.UpdateBiases(); Vector newBiasVector1 = layer1.GetBiasVector(); Assert.AreEqual(-0.475, newBiasVector1.GetValue(0), 0.001); Assert.AreEqual(-0.139, newBiasVector1.GetValue(1), 0.001); }
public void testWeightUpdateMatrixesFormedCorrectly() { Matrix weightMatrix1 = new Matrix(2, 1); weightMatrix1.Set(0, 0, -0.27); weightMatrix1.Set(1, 0, -0.41); Vector biasVector1 = new Vector(2); biasVector1.SetValue(0, -0.48); biasVector1.SetValue(1, -0.13); Layer layer1 = new Layer(weightMatrix1, biasVector1, new LogSigActivationFunction()); LayerSensitivity layer1Sensitivity = new LayerSensitivity(layer1); Vector inputVector1 = new Vector(1); inputVector1.SetValue(0, 1); layer1.FeedForward(inputVector1); Matrix weightMatrix2 = new Matrix(1, 2); weightMatrix2.Set(0, 0, 0.09); weightMatrix2.Set(0, 1, -0.17); Vector biasVector2 = new Vector(1); biasVector2.SetValue(0, 0.48); Layer layer2 = new Layer(weightMatrix2, biasVector2, new PureLinearActivationFunction()); Vector inputVector2 = layer1.GetLastActivationValues(); layer2.FeedForward(inputVector2); Vector errorVector = new Vector(1); errorVector.SetValue(0, 1.261); LayerSensitivity layer2Sensitivity = new LayerSensitivity(layer2); layer2Sensitivity.SensitivityMatrixFromErrorMatrix(errorVector); layer1Sensitivity .SensitivityMatrixFromSucceedingLayer(layer2Sensitivity); Matrix weightUpdateMatrix2 = BackPropagationLearning.CalculateWeightUpdates( layer2Sensitivity, layer1.GetLastActivationValues(), 0.1); Assert.AreEqual(0.0809, weightUpdateMatrix2.Get(0, 0), 0.001); Assert.AreEqual(0.0928, weightUpdateMatrix2.Get(0, 1), 0.001); Matrix lastWeightUpdateMatrix2 = layer2.GetLastWeightUpdateMatrix(); Assert.AreEqual(0.0809, lastWeightUpdateMatrix2.Get(0, 0), 0.001); Assert.AreEqual(0.0928, lastWeightUpdateMatrix2.Get(0, 1), 0.001); Matrix penultimateWeightUpdatematrix2 = layer2 .GetPenultimateWeightUpdateMatrix(); Assert.AreEqual(0.0, penultimateWeightUpdatematrix2.Get(0, 0), 0.001); Assert.AreEqual(0.0, penultimateWeightUpdatematrix2.Get(0, 1), 0.001); Matrix weightUpdateMatrix1 = BackPropagationLearning.CalculateWeightUpdates( layer1Sensitivity, inputVector1, 0.1); Assert.AreEqual(0.0049, weightUpdateMatrix1.Get(0, 0), 0.001); Assert.AreEqual(-0.00997, weightUpdateMatrix1.Get(1, 0), 0.001); Matrix lastWeightUpdateMatrix1 = layer1.GetLastWeightUpdateMatrix(); Assert.AreEqual(0.0049, lastWeightUpdateMatrix1.Get(0, 0), 0.001); Assert.AreEqual(-0.00997, lastWeightUpdateMatrix1.Get(1, 0), 0.001); Matrix penultimateWeightUpdatematrix1 = layer1 .GetPenultimateWeightUpdateMatrix(); Assert.AreEqual(0.0, penultimateWeightUpdatematrix1.Get(0, 0), 0.001); Assert.AreEqual(0.0, penultimateWeightUpdatematrix1.Get(1, 0), 0.001); }