MLP Exercise (2006) Become familiar with the Neural Network Toolbox in Matlab Construct a single hidden layer, feed forward network with sigmoidal units.

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MLP Exercise (2006) Become familiar with the Neural Network Toolbox in Matlab Construct a single hidden layer, feed forward network with sigmoidal units. to output. The network should have n hidden units n=3 to 5. Construct two more networks of same nature with n-1 and n+1 hidden units respectively. Initial random weights are from ~ U [-1 1] The dimensionality of the input data is d=7

MLP Exercise (Cntd) Constructing the a train and test set of size M For simplicity, choose data from a single Gaussian Distribution in d Dimension (where you set the Covariance matrix. Then for each of the M chosen points, set the class label using a threshold to get 50% in each class. Once the threshold is set, create test sets using the same distribution and threshold.

Actual Training Train 5 networks with the same training data (each network has different initial conditions) Construct a classification error graph for both train and test data taken at different time steps (mean and std over 5 nets) Repeat for n=3-5 using both n+1 and n-1 Discuss the results, justify with graphs and provide clear understanding (you may try other setups to test your understanding) Consider momentum and weight decay. Discuss the role of training set size and test set size. Demonstrate hat is the best way to choose between models.