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Security Informatics

Table 4 Used parameter settings for the best performing classifiers

From: Emotion classification of social media posts for estimating people’s reactions to communicated alert messages during crises

Parameter settings

NB

SVM

n-gram size

1 (unigram)

2 (unigram + bigram)

Stemming

Yes

Yes

Stop words

Yes

Yes

Min. no. of occurrences

4

4

Information gain

75%

75%

Negation impact

2

2

Threshold τ

0.6

0.7

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