Скачать или смотреть Visualize Decision Surfaces on K Nearest Neighbor Classification | Machine Learning | MATLAB

gscatter Documentation:
https://www.mathworks.com/help/stats/...

Code:

clc
close all
modelformed=fitcknn(data,'Class~PL+PW');
modelformed.NumNeighbors=10;
e=min(data.PL):0.01:max(data.PL);
f=min(data.PW):0.01:max(data.PW);
[x1 x2]=meshgrid(e,f);
x=[x1(:) x2(:)];
ms=predict(modelformed,x);
gscatter(x1(:),x2(:),ms,'cym');
hold on;
gscatter(data.PL,data.PW,data.Class,'rgb','.',30);
title('knn Classification Visualization');

Dataset:
https://media.geeksforgeeks.org/wp-co...

Prerequisite:
k-nearest neighbor classifier in MATLAB in lesser than 2 minutes | MATLAB
   • k-nearest neighbor classifier in MATLAB in...  



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