How to convert knnclassify to fitcknn

i have script from youtube but still using knnclassify

please help me how to change it to fitcknn, because when directly change knnclassify to fitcknn it always error.

Answer 1

[Sameer]

Hi

Here's how you can convert your code to use "fitcknn":

https://www.mathworks.com/help/stats/fitcknn.html

1. Train the KNN model using "fitcknn"

You only need to train the model once (outside the loop):

x = xlsread('DataTraining.xlsx');
training = x(:,1:4);        % Features (assuming columns 1-4 are features)
group = x(:,5);             % Labels (assuming column 5 is the class label)

% Train KNN model
Mdl = fitcknn(training, group);

2. Predict using the trained model

Use the "predict" function

for i = 1:20
    y = xlsread('DataTesting.xlsx');
    sample = y;
    test = sample(:,1:4);   % Features to test (columns 1-4)
    
    % Predict using the trained model
    result = predict(Mdl, test);
end

3. Save results

name = 'Result_KNN.xlsx';
result = [sample(:,1) sample(:,2) sample(:,3) sample(:,4) sample(:,5) result];
xlswrite(name, result);

Hope this helps!