| Resumen inglés: | The external opinions have always been a factor when taking a decision. Before the boom of blogs and social networks, we used to ask friends for their opinion, read magazines or ask the shop assistant before buying a car. Now we have more options. Blogs, opinion pages and social networks have increased the number of query options, generating a large amount of information, generally unstructured. And that is where the sentiment analysis and opinion mining.
Sentiment analysis is to obtain the underlying polarity of a free text. Two approaches have been selected. Firstly let us consider the simplest approach and the most common in the literature field, the bags of words; and secondly the feature extraction. |
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