Index in position 2 exceeds array bounds (must not exceed 1)

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i get error on this code, can anybody help me please?
The error: Index in position 2 exceeds array bounds (must not exceed 1).
Error in KNN (line 3)
group=latih(:,3);
the code :
x=xlsread("datatraining.xlsx");
latih=x;
group=latih(:,3);
latih = [latih(:,1) latih(:,2)];
for i = 1 : 80
y=xlsread("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);
Thankyou in advance
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Accepted Answer

David Fletcher
David Fletcher on 29 Apr 2021
Edited: David Fletcher on 29 Apr 2021
OK - if you look at the documentation of xlsread, it says the function is no longer recommended to be used. Better to use readtable instead.
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);
As to your other code, I can't comment as I don't have the toolbox on hand with knnclassify. The use of xlswrite (at the end of your code) is also deprecated, so may possibly also produce unpredictable results (as you found with xlsread)
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