An Aspect Level Sentiment Analysis Based on LDA Topic Modeling

Sentiment analysis is a process through which the beliefs, sentiments, allusions, behaviors, and tendencies in a written language are analyzed using natural language processing (nlp) techniques. this process essentially comprises of discovering and understanding people's positive or negative sentiments regarding a product or entity in the text. the increased significance of sentiments analysis has coincided with the growth in social media such as surveys, blogs, twitter, etc. the present study takes advantage of the topic modeling approach based on latent dirichlet allocation (lda) to extract and represent the thematic features as well as a support vector machine (svm) to classify and analyze sentiments at the aspect level. lda seeks to extract latent topics by observing all the texts, which is accomplished by assigning the probability of each word being attributed to each topic. the important features that represent the thematic aspect of the text are extracted and fed to a support vector machine for classification through this approach. svm is an extremely powerful classification algorithm that provides the possibility to separate complex data from one another accurately by mapping the data to a space with much larger aspects and creating an optimal hyperplane. empirical data on real datasets indicate that the proposed model is promising and performs better compared to the baseline methods in terms of precision (with 89.78% on average), recall (with 78.92% on average), and f-measure (with 83.50% on average).