Sentiment Analysis: adding the qualitative to the quantitative
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One of the challenges of analysing textual data in the social-sciences or humanities is that data often requires a binary categorization: does it fall into this box, or that box? This can be a tough call to make, especially when working with data that needs that extra bit of context to be interpreted. And if your data set is too huge to be read through with that level of care, you might want to use a computer to answer some quick questions and give you the gist of it (by making a word cloud, for instance).