Polynomial Linear Regression

In this ML Algorithms course tutorial, we are going to learn “Polynomial Linear Regression in detail. we covered it by practically and theoretical intuition.

  1. What is a Linear Regression?
  2. What is Multiple Linear Regression?
  3. What is Polynomial Linear Regression?
  4. What is the R^2 score?
  5. Why need to use it?
  6. How to implement Polynomial Regression in python?
# Business Problem - Predict the Price of Bangalore House
#Using Linear Regression - Supervised Machine Learning Algorithm

### Load Libraries
import pandas as pd
import numpy as np

"""### Load Data"""

path = r"https://drive.google.com/uc?export=download&id=1xxDtrZKfuWQfl-6KA9XEd_eatitNPnkB" 
df = pd.read_csv(path)

df.head()

"""### Split Data"""

X = df.drop('price', axis=1)
y = df['price']

print('Shape of X = ', X.shape)
print('Shape of y = ', y.shape)

from sklearn.model_selection import train_test_split
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=51)

print('Shape of X_train = ', X_train.shape)
print('Shape of y_train = ', y_train.shape)
print('Shape of X_test = ', X_test.shape)
print('Shape of y_test = ', y_test.shape)

"""### Feature Scaling"""

from sklearn.preprocessing import StandardScaler
sc = StandardScaler()
sc.fit(X_train)
X_train = sc.transform(X_train)
X_test = sc.transform(X_test)

"""## Polynomial Linear Regression - ML Model Training"""

from sklearn.linear_model import LinearRegression
from sklearn.preprocessing import PolynomialFeatures

poly_reg = PolynomialFeatures(degree=2)
poly_reg.fit(X_train)
X_train_poly = poly_reg.transform(X_train)
X_test_poly = poly_reg.transform(X_test)

X_train_poly.shape, X_test_poly.shape

lr = LinearRegression()

lr.fit(X_train_poly, y_train)

lr.score(X_test_poly, y_test,)

lr.predict([X_test_poly[0,:]])

y_pred = lr.predict(X_test_poly)
y_pred

y_test

from sklearn.metrics import mean_squared_error
mse = mean_squared_error(y_test, y_pred)
rmse = np.sqrt(mse)

mse, rmse

"""Ab milenge next tutorial me,Tab tak ke liye SIKHATE SIKHATE kuch IMPLEMENT karte raho,\nThank You.....-:)"""

4 Replies to “Polynomial Linear Regression”

  1. sir kindly preprocessing real time project step by step NAN values ko kesay handle kren plz is pay video banen

    1. Please go through the channel Playlist: Machine Learning & Data Science – Beginner to Professional Hands-on Python Course in Hindi

      I have explained all things.

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