Chapter 3: Deep Learning with Keras

Activity 3: Building a Single-Layer Neural Network for Performing Binary Classification

Solution

1. Load all the required packages:

   # import required packages from Keras

   from keras.models import Sequential

   from keras.layers import Dense, Activation

   import numpy

   # import required packages for plotting

   import matplotlib.pyplot as plt

   import matplotlib

   %matplotlib inline

   import matplotlib.patches as mpatches

   # import the simulated dataset and the function for plotting decision boundary

   from utils import load_dataset, plot_decision_boundary

2. Set up a seed:

   # define a seed for random number generator so the result will be reproducible

   seed = 1

3. Load the simulated dataset, and print the size of X and Y and the number of examples:

   # load the dataset, print the shapes of input and output and the number of examples

   X, Y = load_dataset()

   print(“X size = “, X.shape)

   print(“Y size = “, Y.shape)

   print(“Number of examples = “, X.shape...