QuestiOn The derivative of the sigmoid function no longer exists….

Question Answered step-by-step QuestiOn The derivative of the sigmoid function no longer exists…. QuestiOn The derivative of the sigmoid function no longer exists. This is because, for the learning rule of the cross entropy function, if the activation function of the output node is the sigmoid, the delta equals the output error. Of course, the hidden nodes follow the same process that is used by the previous back-propagation algorithm. e1 = W2’*delta; delta1 = y1.*(1-y1).*e1; The following program listing shows the TestBackpropCE.m file, which tests the BackpropCE function. This program calls the BackpropCE function and trains the neural network 10,000 times. The trained neural network yields the output for the training data input, and the result is displayed on the screen. We verify the proper training of the neural network by comparing the output to the correct output. Further explanation is omitted, as the code is almost identical to that from before. clear all X = [ 0 0 1; 0 1 1; 1 0 1; 1 1 1; ]; Executing this code produces the values and functions The data was used with many others for comparing various    classifiers. The classes are separable, though only RDA    has achieved 100% correct classification.   (RDA : 100%, QDA 99.4%, LDA 98.9%, 1NN 96.1% (z-transformed data))   (All results using the leave-one-out technique)Load up the iris data set. This can be easily done using the command load fisheriris. Considering only the following features:  petal length (x-axis) and sepal length (y-axis), plot the data set using the gscatter command. Classify the following data points: (2.5,6.0),(4.5,5.0), and (5.5,7.0)Train a k-NN classifier with k = 5 using the whole iris dataset. Use only the following features: petal length, sepal length.Store the label of the 3 points in a 3-by-2 matrix called: id1.The plot of both the dataset and the points should be shown in one plot in Figure 1. You should use “hold on” to show both the dataset and the points on the same plot.Observe proper plot titles and axis labels.  Computer Science Engineering & Technology C++ Programming COMPUTER S 145 Share QuestionEmailCopy link Comments (0)