Skip to content

Instantly share code, notes, and snippets.

@Jargon4072
Created June 24, 2020 04:14
Show Gist options
  • Save Jargon4072/314e3686216340760477e369e279a2ff to your computer and use it in GitHub Desktop.
Save Jargon4072/314e3686216340760477e369e279a2ff to your computer and use it in GitHub Desktop.
def step_gradient(b_current, m_current, points, learningRate):
b_gradient = 0
m_gradient = 0
N = float(len(points))
for i in range(0, len(points)):
x = points[i, 0]
y = points[i, 1]
b_gradient += -(2/N) * (y - ((m_current * x) + b_current))
m_gradient += -(2/N) * x * (y - ((m_current * x) + b_current))
new_b = b_current - (learningRate * b_gradient)
new_m = m_current - (learningRate * m_gradient)
return [new_b, new_m]
def gradient_descent_runner(points, starting_b, starting_m, learning_rate, num_iterations):
b = starting_b
m = starting_m
for i in range(num_iterations):
b, m = step_gradient(b, m, array(points), learning_rate)
return [b, m]
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment