README
¶
AfinnGo
An AFINN-165-powered sentiment analysis tool written in Go. This is essentially a port of the npm sentiment module, but in Go for a small side-project I am working on.
Use
To access the default English AFINN-165 analyzer, you can use the following:
import "github.com/joshuaslate/afinngo"
func isSentencePositive(sentence string) bool {
analyzer := afinngo.NewDefaultSentimentAnalyzer()
output := analyzer.Analyze("There is nothing quite like a warm, sunny day at the beach!")
return output.Comparative > 0
}
The output of the Analyzer func is:
type SentimentResult struct {
Score float64
Comparative float64
Tokens []string
Words []string
Positive []string
Negative []string
}
Customization
You can also use your own analyzation strategy (dictionaries for different languages, handling scoring differently, etc.) by satisfying the ScoringStrategy interface.
type ScoringStrategy interface {
getScore(tokens []string, currentTokenIndex int, currentTokenScore float64) float64
getTokens() map[string]float64
getNegators() map[string]float64
}
// Where customStrategy satisfies the ScoringStrategy interface
myAnalyzer := afinngo.NewSentimentAnalyzerFromStrategy(customStrategy)
Contributions
Contributions are welcome. Please feel empowered to fork this repository, make changes, and open a pull request to send your changes back upstream.
Documentation
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Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type EnglishStrategy ¶
EnglishStrategy is the default scoring strategy (implements ScoringStrategy interface)
func NewEnglishStrategy ¶
func NewEnglishStrategy() *EnglishStrategy
NewEnglishStrategy builds the default sentiment scoring strategy for the English language
type ScoringStrategy ¶
type ScoringStrategy interface {
// contains filtered or unexported methods
}
ScoringStrategy is an interface that holds a function to determine a scoring strategy
type SentimentAnalyzer ¶
type SentimentAnalyzer struct {
Strategy ScoringStrategy
Tokens map[string]float64
Negators map[string]float64
}
SentimentAnalyzer is loaded with a dictionary and contains the method to provide sentiment analysis
func NewDefaultSentimentAnalyzer ¶
func NewDefaultSentimentAnalyzer() *SentimentAnalyzer
NewDefaultSentimentAnalyzer returns an English AFINN165 sentiment analyzer
func NewSentimentAnalyzerFromStrategy ¶
func NewSentimentAnalyzerFromStrategy(strategy ScoringStrategy) *SentimentAnalyzer
NewSentimentAnalyzerFromStrategy loads a dictionary and returns a new instance of a SentimentAnalyzer, given a strategy
func (*SentimentAnalyzer) Analyze ¶
func (a *SentimentAnalyzer) Analyze(phrase string) SentimentResult
Analyze a phrase for its sentiment (positive or negative)
Source Files