Sentiment analysis is opinion mining of text content which identifies and extracts subjective information in source materials. ParallelDots Sentiment analysis API provides a very accurate analysis of the overall sentiment of the text content which can be widely applied to reviews and social media for a variety of applications, ranging from marketing to customer service.

Humans are fairly sophisticated when it comes to understanding the complex meanings beneath the spoken or written word. For example, we can tell that a statement like, "My car had a flat. Brilliant!" is sarcastic, not actually brilliant. And with the help of machine learning, computers are beginning to get better at reading between the lines of our tweets, Facebook updates, and email messages, resulting in a new kind of analytics: sentiment analysis. Sentiment analysis, also known as opinion mining, seeks to determine the attitude of an individual or group regarding a particular topic or overall context – be it a judgment, evaluation, or emotional reaction – from text, video, or audio data.

Money related markets are whimsical monsters that can be to a great degree hard to explore for the normal financial specialist. This Complete Machine Learning Tutorial will acquaint you with machine learning, a field of study that gives PCs the capacity to learn without being unequivocally modified, while showing you how to apply these strategies to quantitative exchanging. Utilizing Python libraries, you'll find how to build refined monetary models that will better advise your contributing choices. In a perfect world, this one will purchase itself back to say the least! R is a programming dialect and programming environment for factual processing and representation that is generally utilized among analysts and information mineworkers for information examination.

In the probabilistic topic models, the quantity of interest---a low-rank matrix consisting of topic vectors---is hidden in the text corpus matrix, masked by noise, and the Singular Value Decomposition (SVD) is a potentially useful tool for learning such a low-rank matrix. However, the connection between this low-rank matrix and the singular vectors of the text corpus matrix are usually complicated and hard to spell out, so how to use SVD for learning topic models faces challenges. In this paper, we overcome the challenge by revealing a surprising insight: there is a low-dimensional simplex structure which can be viewed as a bridge between the low-rank matrix of interest and the SVD of the text corpus matrix, and allows us to conveniently reconstruct the former using the latter. Such an insight motivates a new SVD approach to learning topic models, which we analyze with delicate random matrix theory and derive the rate of convergence. We support our methods and theory numerically, using both simulated data and real data.

Building on a raft of machine learning-related announcements it made earlier in the year, Google has just launched two new machine learning APIs into beta. The most exciting of the two looks to be the new Google Cloud Natural Language API, which is aimed at helping developers build applications that understand human language. The API works by letting users reveal the structure and meaning of a text, and is available in English, Spanish and Japanese for now, with the promise of support for additional languages to come. In a second blog post focusing on the Cloud Natural Language API, Google demonstrates how it can be used to analyze a report in the New York Times. Per Google's example, you can perform sentiment analysis on various blocks of text using the API, run the results in a BigQuery table, and then use Google Data Studio to visualize them: In a second example, Google showed how digital marketers can use the sentiment analysis capabilities in the Cloud Natural Language API to monitor customer calls to service centers and online reviews.

"How to choose the best topic model?" is the #1 question on our community mailing list. At RaRe Technologies I manage the community for the Python open source topic modeling package gensim. As so many people are looking for the answer, we've recently released an updated gensim 0.13.1 incorporating several new exciting features which evaluate if your model is any good, helping you to select the best topic model. Topic modeling is a technique for taking some unstructured text and automatically extracting its common themes, using machine learning. It is a great way to get a bird's eye view on a large text collection.

There are six main types of stories in fiction. That's what computer scientists found after teaching a machine to map the emotional arc of a huge corpus of literature. The overall research they did is fascinating (I wrote about it in greater detail here), but several smaller components of the work are compelling in their own right. To prepare a machine to carry out a sentiment analysis, for instance, computer scientists had to assign a happiness index to 10,222 individual words. That way, as the machine scanned passages from books, it could assess the emotional arc of the narrative.

This talk presents unsupervised analysis techniques that can be applied to collections of unstructured text documents for the purpose of discovering hidden topical trends, correlations or anomalies in their data. The techniques presented are applicable to a wide range of document types including news stories, technical blogs, customer feedback forms, congressional records, and legal documents, among many, many others. The talk will include introductory descriptions of the processing techniques needed to pre-process text data, discover salient multi-word phrases, and learn latent topic models describing the topical content of a collection of text data. The primary focus of the talk will be on analytic techniques that can be applied to the output of a latent topic model to extract trending topics over time, uncover topical correlations with other document features or meta-data, and discover anomalies in a text corpus. To illustrate these techniques, examples using news wire and congressional record data will demonstrate how important events in news wire data and anomalous congressional actions and interesting correlations can be discovered automatically using the presented unsupervised techniques.

The consumer sentiment analysis of this one's pretty easy, but will they be compensated? When a person feels sufficiently wronged to lodge a complaint with the Consumer Financial Protection Bureau (CFPB), there's likely to be some negative sentiment involved. But is there a connection between the language they use and the likelihood they will be compensated by the offending company? At the upcoming Sentiment Analysis Symposium, I will discuss how machine learning and rule-based sentiment analysis can support each other in a complementary analysis, and produce actionable information from large amounts of free form text. In this case, machine learning and sentiment analysis could improve and evolve the CFPB's ability to assess consumer complaints.

Cognovi Labs is a new analytics startup that relies on Twitris, a Wright State University-developed tool that claims to be able to take a sample of social media chatter about a specific topic and deduce real-time, large-scale, automated sentiment about the specific topic they are researching. As a real-world example of the tool's capability, the Cognovi Labs research team -- led by Wright State University researcher (and Cognovi Labs inventor) Dr. Amit Sheth -- analyzed Twitter chatter leading up to the Great Britain/European Union Membership Referendum (Brexit) on June 23. The team was able to predict some six hours before the news broke that the polls leaning toward the "remain" camp were incorrect. This was predicted by running Twitter chatter through the Cognovi Labs Twitris tool. The machine learning tool leverages Cognovi Labs' semantic intellectual property to be able to automate and extract aggregate meaning from social media chatter (including slang) in new, more precise ways.