Optimization on machine learning based approaches for sentiment analysis on HPV vaccines related tweets

Table 2 10-fold cross validation performance on the baseline model and hierarchical classification model. (F: F-1 score; P: precision; R: recall; for the categories that do not indicate the metric, F-1 score are used)

Classification Model		Plain Classification (Baseline model)	Hierarchical Classification
Micro-averaging	F	0.6732	0.7208
Macro-averaging	P	0.4455	0.5402
	R	0.3574	0.4386
	F	0.3967	0.4841
Unrelated		0.8044	0.8599
Neutral		0.5792	0.6181
Positive		0.6528	0.7021
NegSafety		0.7006	0.7277
NegEfficacy		0	0.2593
NegCost		0	0
NegResistant		0	0
NegOthers		0.155	0.4645

ISSN: 2041-1480