Table 11 Computational complexity of various employed methodologies for classification.
Classifiers | Without feature extraction | With STFT feature extraction | With LASSO feature extraction | With EHO feature extraction |
|---|---|---|---|---|
GMM | O(2n log2n) | O(2n4 log2n) | O(2n3 log2n) | O(2n4 log2n) |
PSO GMM | O(2n3 log2n) | O(2n7 log2n) | O(2n4 log2n) | O(2n5 log2n) |
DFA | O(n) | O(2n3) | O(n3) | O(n4) |
NBC | O(n log2n) | O(2n3 log2n) | O(n3 log2n) | O(n4 log2n) |
Firefly GMM | O(2n2 log2n) | O(2n4 log2n) | O(2n4 log2n) | O(2n4 log2n) |
SVM (RBF) | O(n log n) | O(2n2log n) | O(n3 log n) | O(n4 log n) |
FPO-GMM | O(2n5 log2n) | O(2n7 log2n) | O(2n7 log2n) | O(2n8 log2n) |
