Construction and analysis of Emoji Sentiment Ranking is described in the following paper:
P. Kralj Novak, J. Smailovic, B. Sluban, I. Mozetic,
Sentiment of Emojis, PLoS ONE 10(12): e0144296,
doi:10.1371/journal.pone.0144296, 2015.
BibTex citation:
@article{Kralj2015emojis, author={{Kralj Novak}, Petra and Smailovi{\'c}, Jasmina and Sluban, Borut and Mozeti\v{c}, Igor}, title={Sentiment of emojis}, journal={PLoS ONE}, volume={10}, number={12}, pages={e0144296}, url={http://dx.doi.org/10.1371/journal.pone.0144296}, year={2015} }
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Resouces:
Emojitracker - emoji use on Twitter in real-time
Unicode Emoji Charts - list of the Unicode emoji characters
Emojipedia - search for emoji
Contact: petra.kralj.novak (at) ijs.si