ForteXX-2020/0004_OLSregression

## 0004_OLSregression
from pylab import plt
import numpy as np

def f(x):
    return 3 * x ** 3 - 4 * x ** 2

x = np.linspace(-2, 4, 25)

y = f(x)

plt.figure(figsize=(10, 6))
plt.plot(x, y, 'ro');


a, b = np.polyfit(x, y, 1)
y_hat = a*x + b

plt.plot(x, y_hat, 'b-');
	from pylab import plt
	import numpy as np

	def f(x):
	return 3 * x ** 3 - 4 * x ** 2

	x = np.linspace(-2, 4, 25)

	y = f(x)

	plt.figure(figsize=(10, 6))
	plt.plot(x, y, 'ro');


	a, b = np.polyfit(x, y, 1)
	y_hat = a*x + b

	plt.plot(x, y_hat, 'b-');