Learning of a Log-linear model using Gradient Descent

The code implements the gradient descent algorithm to learn the log linear model of the OR function

The code implements the gradient descent algorithm to learn the log linear model of the OR function below:
x_0 x_1 C_k
1 1 1
0 1 1
1 0 1
0 0 0

using the following feature map:

\phi(x,C_k) = [ (x_0 =1 & C_k = 1), x_1 = 1 & C_k = 1, C_k = 1];