convert knnclassify to fitcknn

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Frisda Sianipar 2021-4-29

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/816785-convert-knnclassify-to-fitcknn

评论： rashigha Shankar 2022-7-14

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

please help me to convert knnclassify to fitcknn

x=readtable("datatraining.xlsx");
latih=x;
group=latih(:,3);
latih = [latih(:,1) latih(:,2)];
for i = 1 : 80
    y=readtable("datatesting.xlsx");
    sampel = y;
    test = [sampel(:,1) sampel(:,2)];
%sampel = [2.6136  0.1284 1.3017  -0.8089  0.0441  -0,2084];
    hasil=knnclassify(test,latih,group);
end
nama = "hasil KNN.xlsx";
hasil = [sampel(:,1) sampel(:,2) sampel(:,3) hasil];
xlswrite(nama,hasil);

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Frisda Sianipar 2021-5-6

i have tried use fitcknn but still have error sir

Walter Roberson 2021-5-6

And I already answered you at https://www.mathworks.com/matlabcentral/answers/505383-how-can-i-convert-knnclassify-to-fitcknn#comment_1502310

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采纳的回答

Walter Roberson 2021-5-6

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/816785-convert-knnclassify-to-fitcknn#answer_693305

在 MATLAB Online 中打开

x = readtable("https://www.mathworks.com/matlabcentral/answers/uploaded_files/600525/datatraining.xlsx");
y = readtable("https://www.mathworks.com/matlabcentral/answers/uploaded_files/600520/datatesting.xlsx");
traindata = x{:,2};
traingroup = x{:,3};
testdata = y{:,2};
testgroup = y{:,3};
Mdl = fitcknn(traindata, traingroup,'Distance','euclidean','NumNeighbors',8,'Standardize',1,'BreakTies','nearest');
hasil = predict(Mdl, testdata);
nama = "hasil KNN.xlsx";
y.hasil = hasil;
writetable(y, nama)
does_it_match = strcmp(hasil, testgroup);
correct_percent = mean(does_it_match) * 100
correct_percent = 73.7500