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Confusion matrix (CM) with and without normalization of the MLP algorithm; (a) 63 arrhythmias and 81 normal signals are correctly classified, while 9 arrhythmias and 12 normal ECG signals are misclassified; (b) CM with normalization gives an accuracy in percentage; in this case, accuracy was 88% for arrythmia and 87% for normal sinus ECG.
