Score for all comments: The average sentiment score for all comments across all clusters, where -1 is Extremely Negative and +1 is Extremely Positive.
Cluster score: The average sentiment score for all comments within the selected cluster, where -1 is Extremely Negative and +1 is Extremely Positive.
Comments: The number of comments in this cluster.
Percentage: The percentage of comments in the cluster based to all comments across all clusters.
Sharpness Slider: This slider changes the requirement for a comment to belong to a cluster. When the slider is fuzzy, comments can belong to multiple clusters, when it is set to sharp, a comment may belong to one cluster or none at all. In addition, the sharpness slider determines the words shown for a cluster. When the slider is set to fuzzy, words which are used frequently are more likely to be displayed. When the slider is set to sharp, words which are more defining for the cluster are displayed.
Auto Sharpness: This setting balances the above considerations. It ensure every comment is clustered at least once. It also displays words which are both frequent, and defining for the cluster. Sharpness slider will be disabled when this setting is enabled.