what is the actual formula to compute sentiments using sentiment rated lexicon. the lexicon that I am using contains rating between the range -5 to 5. I want to compute sentiment for individual sentences. Either i have to compute average of all sentiment ranked words in sentence or only sum up them.
you can use R tool for sentiment computation. here is the link you can refer to: https://sites.google.com/site/miningtwitter/questions/sentiment/analysis