ASK Question

Quick links:
Latest articles
Internship
Members

Languages:
C
C++
C++ STL
Java
Data Structure
C#.Net
Android
Kotlin
SQL

Web:
PHP
Python
JavaScript
CSS
Ajax
Node.js
Web prog.

Programs:
C
C++
DS
Java
C#
Python


Aptitude:
C
C++
Java
DBMS

Interview:
C
Embedded C
Java
SEO
HR

CS Subjects:
CS Basics
O.S.
Networks
DBMS
Embedded Systems
Cloud Computing
Machine learning
CS Organizations
Linux
DOS

More:
Articles
Puzzles
News/Updates


Home » Machine Learning/Artificial Intelligence

Naive Bayes Algorithm in Machine learning



In this article, we are going to learn about Naive Bayes Algorithm in Machine learning, what is the algorithm and how it will be solved?
Submitted by Anamika Gupta, on June 08, 2018

Naive Bayes Algorithm

Naive Bayes is basically used for text learning. Using this algorithm we trained machine from text.

Let’s understand it with an example:

Question:

There are two writers SARA and CHRIS .The probability of writing the word "LOVE" ,"DEAL" and "LIFE" is 0.1,0.8 and 0.1 respectively by CHRIS and 0.5,0.2 and 0.3 by SARA. The probability of sending mail by CHRIS and SARA is 0.5, and then answer this question:

  1. Who will more likely send the mail "LOVE LIFE"?
  2. What is the probability that "LOVE LIFE" is send by CHRIS?

Solution:

Ans 1)

P(CHRIS,"LOVE LIFE")=P(CHRIS) *P("LOVE LIFE"|CHRIS)
    = 0.5 * (0.1 *0.1) =0.005
P(SARA,"LOVE LIFE")=P(SARA) * P("LOVE LIFE"|SARA)
    = 0.5 * (0.5 * 0.3)
    = 0.075

Hence, SARA is more likely to send mail "LOVE LIFE".

Ans 2)

Normalize:
P("LOVE LIFE")=P(CHRIS,"LOVE LIFE")+P(SARA,"LOVE LIFE") = 0.005+0.075 = 0.08 Probability of sending mail "LOVE LIFE" by CHRIS (P(CHRIS|"LOVE LIFE")) = P(CHRIS,"LOVE LIFE")/P("LOVE LIFE") = 0.005/0.08 = 0.0625

Similarly for probability of sending mail by SARA we can divide 0.075 by the total of two i.e. 0.08.

HENCE THIS PROCESS IS THE ALGORITHM FOR BAYES RULE.






Quick links:
C FAQ(s) C Advance programs C/C++ Tips & Tricks Puzzles JavaScript CSS Python Linux Commands PHP Android Articles More...

Was this page helpful? Please share with your friends...

Are you a blogger? Join our Blogging forum.

Comments and Discussions




Languages: » C » C++ » C++ STL » Java » Data Structure » C#.Net » Android » Kotlin » SQL
Web Technologies: » PHP » Python » JavaScript » CSS » Ajax » Node.js » Web programming/HTML
Solved programs: » C » C++ » DS » Java » C#
Aptitude que. & ans.: » C » C++ » Java » DBMS
Interview que. & ans.: » C » Embedded C » Java » SEO » HR
CS Subjects: » CS Basics » O.S. » Networks » DBMS » Embedded Systems » Cloud Computing » Machine learning » CS Organizations » Linux » DOS
More: » Articles » Puzzles » News/Updates


© https://www.includehelp.com (2015-2018), Some rights reserved.