# [Solved] CS3120 Homework 5

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(Only NumPy and data visualization packages are allowed.)

1.Read through Slide11 and 12, watch video lectures of neural networks.

2.Run the code “8_NN_2layer.py” (blackboard)

3. Trains the NN more than 1,000 times and observe the change of the loss value.

1. Implement a “3-6-2” network (using code 8_NN_2layer.py) to fit the following data:

X=np.array(([0,0,1],[0,1,1],[1,0,1],[1,1,1]), dtype=float)

y=np.array(([0,1],[1,0],[1,0],[0,1]), dtype=float)

1. What are the dimension of weight matrix 1 and weight matrix 2? (5pts)
2. Test the two following samples and write down the predicted y values for them. (5 pts)

Testing sample one: X1 = [0, 0, 0] y1=[? ?]

Testing sample two: X2 = [1,1,1] y2=[? ?]

Submission:

Write a report to describe /answer required questions (5 and 6).

File1: Assignment5_FirstnameLastname.doc/.pdf (this is the report)

+

File2: Assignment5_ FirstnameLastname.py (this is the code. only “.py” files accepted.

OR

Assignment5_ FirstnameLastname.zip if you have multiple “.py” files.

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