Implementing Multiple Linear Regression in Python

In this lecture, we talk about how to implement Linear Regression in Python.

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[improgrammer]

Here is the full working code of this video, Use jupyter notebook for understanding.

import numpy as np
import matplotlib.pyplot as plt
import pandas as pd

from sklearn.model_selection import train_test_split
from sklearn.linear_model import LinearRegression
from sklearn.metrics import mean_squared_error, r2_score
import math

dataset =
print(dataset.shape)
dataset.head()


Spend'], dataset['Profit'])
plt.title('Multiple Regression')
plt.xlabel('Marketing Spend')
plt.ylabel('Profit')
plt.show()

, dataset['Profit'])
plt.title('Multiple Regression')
plt.xlabel('Administration')
plt.ylabel('Profit')
plt.show()


plt.scatter(dataset['R&D Spend'], dataset['Profit'])
plt.title('Multiple Regression')
plt.xlabel('R & D Spend')
plt.ylabel('Profit')
plt.show()




== 'New York', 1, 0)
== 'Florida', 1, 0)
== 'California', 1, 0)
dataset['profit'] = dataset['Profit']

dataset.drop(columns=['State'], axis=1, inplace=True)
dataset.drop(columns=['Profit'], axis=1, inplace=True)


print(dataset.head())

X=dataset.iloc[:, :6]
y=dataset.iloc[:, 6:]

X_train, X_test, y_train, y_test = train_test_split(X, y, random_state=0, test_size = 0.25)

from sklearn.preprocessing import MinMaxScaler

scaler = MinMaxScaler()
X_train
X_test = scaler.fit_transform(X_test)

X_train[0:5]

model = LinearRegression()
model.fit(X_train, y_train)


ypred = model.predict(X_test)


print(ypred)


math.sqrt(mean_squared_error(y_test, ypred))

r2_score(y_test, ypred)

[mohitnamdev]

thank you so much sir.
It is very clear explanation and helpful.

[saitarun]

thank you so much very clear explanation very helpful.

[christheprophet]

Good explanation. I don't know if you did not check for outliers on purpose.

[snivesz]

Thank you. What is the purpose of scaling the exogenous variables before regression? It’s my understanding that that will only change the scale of the betas but not the significance of them.

[poojardyrccertificatecade]

Sir I am getting key error in creating the figure object can u please help me with this

[cricplay]

Could u please make a video on other ai models like rbf, anfis Or rnn?

[meetkcs]

Excellent very simple way explained.

Thank you for the KT.


Can u plz share the dataset and code...I ll practice at my end once.