k-Nearest Neighbors (kNN) Classifier

버전 2.2.1 (35.8 KB) 작성자: David Ferreira

Multi-class Classification with the kNN

https://www.youtube.com/watch?v=TI3XxHUaujw

팔로우

5.0

(2)

다운로드 수: 2.1K

업데이트 날짜: 2020/10/28

GitHub에서 라이선스 보기

Function
1. kNNeighbors.predict(_)
2. kNNeighbors.find(_)

Description
1. Returns the estimated labels of one or multiple test instances.
2. Returns the indices and the respective distances of the k nearest training instances.

Examples using Iris Data Set

load fisheriris

X = meas;
Y = species;
Xnew = [min(X);mean(X);max(X)];
k = 5;
metric = 'euclidean';

mdl = kNNeighbors(k,metric);
mdl = mdl.fit(X,Y);
Ypred = mdl.predict(Xnew)

Ypred =

'setosa'
'versicolor'
'virginica'

Ynew = {'versicolor';'versicolor';'virginica'};
accuracy = accuracy_score(Ypred,Ynew)

accuracy =

0.6667

See examples in the script files.

인용 양식

David Ferreira (2019). k-Nearest Neighbors (kNN) (https://www.mathworks.com/matlabcentral/fileexchange/67018-k-nearest-neighbors-knn), MathWorks. Retrieved January 23, 2019.

MATLAB 릴리스 호환 정보

개발 환경: R2016a

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GitHub 디폴트 브랜치를 사용하는 버전은 다운로드할 수 없음

버전	게시됨	릴리스 정보
2.2.1	2020/10/28	See release notes for this release on GitHub: https://github.com/ferreirad08/kNNeighborsClassifier/releases/tag/2.2.1	다운로드
2.2.0	2020/10/26	See release notes for this release on GitHub: https://github.com/ferreirad08/k-Nearest-Neighbors-kNN-Algorithm/releases/tag/2.2.0	다운로드
2.1.9	2020/10/26	See release notes for this release on GitHub: https://github.com/ferreirad08/k-Nearest-Neighbors-kNN-Algorithm/releases/tag/2.1.9	다운로드
2.1.8	2020/6/26	Find function added
2.1.7	2019/2/14	Description correction
2.1.6	2019/2/11	Description correction
2.1.5	2019/1/29	Description correction
2.1.4	2019/1/27	Description correction
2.1.3	2019/1/26	3-D chart added and cell type label support.
2.1.2	2019/1/24	The plotting 3-D function was added in the main algorithm.
2.1.1	2019/1/24	More markers were added to the chart.
2.1.0	2019/1/23	The plotting function was added in the main algorithm.
2.0.9	2019/1/23	Function Pack
2.0.8	2019/1/22	Title correction
2.0.7	2019/1/21	Title correction
2.0.6	2019/1/17	Added to github.
2.0.5	2018/12/21	New tools have been added, bringing a more complete algorithm.	다운로드
2.0.4	2018/12/14	Simplification in k nearest instances and k nearest labels	다운로드
2.0.3	2018/12/14	Basic update	다운로드
2.0.2	2018/12/14	Update in maximum frequency	다운로드
2.0.1	2018/12/13	Simplification in frequency verification	다운로드
2.0.0	2018/12/13	Check the frequencies using 'histcounts'	다운로드
1.62	2018/11/19	Title correction	다운로드
1.61	2018/11/19	Correction of the k nearest labels.	다운로드
1.60	2018/11/19	Returns the k nearest labels.	다운로드
1.54	2018/11/18	Basic update	다운로드
1.53	2018/11/18	Updating the Euclidean distance between two points	다운로드
1.52	2018/11/16	Description correction	다운로드
1.51	2018/11/15	Description correction	다운로드
1.5	2018/7/26	Elements sorted by "sort" function and reduced processing time by approximately 1/3.	다운로드
1.1.0.0	2018/5/17	Update of the calculation of the Euclidean distance between two points	다운로드
1.0.0.0	2018/4/24	Description correction It was added the verification of the dimensions of the matrices.	다운로드

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