machine learning - a perceptron algorithm with standard gradient descent in python -


i designed perceptron standard gradient descent, has errors non-descent number of errors, shown below. could

def predict(row, weights, bias):   activation = 0   in xrange(len(row) - 1):       activation += row[i] * weights[i]   activation += bias   return activation  def data_train(dataset, weights, bias, rolling_time):   sum_loss_w = [0, 0, 0, 0]   loss_b = 0   time in xrange(rolling_time):       sum_loss = 0       row in dataset:           prediction = predict(row, weights, bias)           prediction_m = row[-1] * prediction           if prediction_m <= 0:               sum_loss += 1               in xrange(len(single_error_w)):                   single_error_w[i] = row[i] * row[-1]                   sum_loss_w[i] += single_error_w[i]               loss_b += row[-1]       element in xrange(len(weights)):           weights[element] = weights[element] + step_size * sum_loss_w[element]       bias = bias + step_size * loss_b       print'>>time = %d, step_size = %d, error = %d' %(time, step_size, sum_loss)   return weights, bias

and results below,

>>time = 0, step_size = 1, error = 1000 >>time = 1, step_size = 1, error = 394 >>time = 2, step_size = 1, error = 110 >>time = 3, step_size = 1, error = 570 >>time = 4, step_size = 1, error = 9 >>time = 5, step_size = 1, error = 314 >>time = 6, step_size = 1, error = 248 >>time = 7, step_size = 1, error = 41 >>time = 8, step_size = 1, error = 235 >>time = 9, step_size = 1, error = 203

how can modify it?

you guys can download training data here: https://elearning.utdallas.edu/bbcswebdav/pid-1673953-dt-content-rid-16874944_1/xid-16874944_1


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