how i can use confusion_matrix for result of image classification using knn?

Hello everyone.

I'm trying to classify an images containing two classes using a Knn classifer.

and would like to evaluate the performance using its confusion matrix. But how can I use it with the KNN classifier?

This is my code of KNN classifer

model=ClassificationKNN.fit(X,Y,'NumNeighbors',9);

[~,result1]=predict(model,x);

how i can use confusion_matrix in this situation

Answer 1

[Ridwan Alam]

yhat = predict(model,x);

C = confusionmat(y,yhat)