Table 2.

The performance of the emotional polarity classification model.

Model	Precision	Recall	F1-score
SVMa	0.512	0.506	0.509
CNNb	0.619	0.602	0.607
LSTMc	0.664	0.664	0.658
Bi-LSTMd	0.701	0.699	0.701

^aSVM: support vector machine.

^bCNN: convolutional neural network.

^cLSTM: long short-term memory.

^dBi-LSTM: bidirectional long short-term memory.