convertToDirection {SentimentAnalysis}

Convert continuous sentiment to direction

Description

This function converts continuous sentiment scores into a their corresponding sentiment direction. As such, the result is a factor with three levels indicating positive, neutral and negative content. In contrast to convertToBinaryResponse, neutral documents have their own category.

Usage

convertToDirection(sentiment)

Arguments

sentiment

Vector, matrix or data.frame with sentiment scores.

Details

If a matrix or data.frame is provided, this routine does not touch all columns. In fact, it scans for those where the column name starts with "Sentiment" and changes these columns only. Hence, columns with pure negativity, positivity or ratios or word counts are ignored.

Value

If a vector is supplied, it returns a factor with three levels representing positive, neutral and negative content. Otherwise, it returns a data.frame with the corresponding columns being exchanged.

See Also

convertToBinaryResponse

Examples

sentiment <- c(-1, -0.5, +1, 0.6, 0)
convertToBinaryResponse(sentiment)
convertToDirection(sentiment)

df <- data.frame(No=1:5, Sentiment=sentiment)
df
convertToBinaryResponse(df)
convertToDirection(df)