What is KNN algorithm

0 votes
What is KNN algorithm? Can you explain with an example? Thank you..
May 13, 2019 in Machine Learning by Minakshi
1,754 views

1 answer to this question.

0 votes

KNN which stand for K Nearest Neighbor is a Supervised Machine Learning algorithm that classifies a new data point into the target class, depending on the features of its neighboring data points. 

Let’s try to understand the KNN algorithm with a simple example. Let’s say we want a machine to distinguish between images of cats & dogs. To do this we must input a dataset of cat and dog images and we have to train our model to detect the animals based on certain features. For example, features such as pointy ears can be used to identify cats and similarly we can identify dogs based on their long ears.

After studying the dataset during the training phase, when a new image is given to the model, the KNN algorithm will classify it into either cats or dogs depending on the similarity in their features. So if the new image has pointy ears, it will classify that image as a cat because it is similar to the cat images. In this manner, the KNN algorithm classifies data points based on how similar they are to their neighboring data points.

answered May 13, 2019 by Jinu

Related Questions In Machine Learning

0 votes
1 answer

What is decision tree algorithm?

A decision tree is a map of ...READ MORE

answered May 13, 2019 in Machine Learning by Upadhya
2,259 views
0 votes
1 answer

What is greedy approach in Decision tree algorithm?

“Greedy Approach is based on the concept ...READ MORE

answered May 13, 2019 in Machine Learning by Upadhya
14,161 views
0 votes
1 answer

Example to run KNN algorithm using python

Have a look at this one: from sklearn.datasets ...READ MORE

answered May 9, 2019 in Machine Learning by Harvy
1,269 views
0 votes
1 answer

What is the process involved in machine Learning?

Discussing this on a high level, these ...READ MORE

answered May 10, 2019 in Machine Learning by Rhea
1,294 views
0 votes
1 answer

Features of KNN algorithm

The KNN algorithm has the following features: KNN ...READ MORE

answered May 13, 2019 in Machine Learning by Vedant
7,491 views
0 votes
2 answers

What is supervised learning?

Supervised learning is the machine learning task ...READ MORE

answered Sep 3, 2019 in Data Analytics by anonymous
• 33,030 points
1,319 views
0 votes
1 answer

What is semi-supervised machine learning?

Hi@Ganesh, Semi-supervised machine learning is a combination of ...READ MORE

answered Jul 19, 2020 in Machine Learning by MD
• 95,440 points
782 views
0 votes
1 answer

What is Reinforcement learning?

Alright, let me not get into the ...READ MORE

answered May 9, 2019 in Machine Learning by Alok
1,133 views
0 votes
1 answer

What is Unsupervised Learning?

Unsupervised Learning is the training of machine ...READ MORE

answered May 8, 2019 in Machine Learning by Alok
1,139 views
0 votes
1 answer

What is clustering in Machine Learning?

Clustering is a type of unsupervised learning ...READ MORE

answered May 10, 2019 in Machine Learning by Shridhar
944 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP