Sentiment Analysis using NLP and Machine Learning Techniques on Social Media Data IEEE Conference Publication


nlp sentiment analysis

Sentiment analysis allows you to train an AI model that will look out for thoughts and messages surrounding particular topics or areas. To monitor in real-time all of the conversations that relate to your brand and image. Lettria’s API uses resources from psychology and the 8 primary emotions modelled in Putichik’s wheel of emotions (joy, sadness, fear, anger, attract, surprise, and anticipation). Lettria offers all of the benefits of an off-the-shelf NLP (implementation and production time) with the power and customization of building one your own (but 4 times faster). Alright, that’s the sales pitch done, now let’s take a closer look at how Lettria actually handles sentiment analysis.

Which NLP algorithms are best for sentiment analysis?

RNNs are probably the most commonly used deep learning models for NLP and with good reason. Because these networks are recurrent, they are ideal for working with sequential data such as text. In sentiment analysis, they can be used to repeatedly predict the sentiment as each token in a piece of text is ingested.

Here’s a quite comprehensive list of emojis and their unicode characters that may come in handy when preprocessing. These are all great jumping off points designed to visually demonstrate the value of sentiment analysis – but they only scratch the surface of its true power. It’s estimated that people only agree around 60-65% of the time when determining the sentiment of a particular text.


The exact process is followed here, i.e., an index vector represents every word. Further, it is integrated into the deep learning model as a hidden layer of linear neurons and converts these significant vectors into small parts. According to research, customers only agree for 60-65% while determining the sentiment of the particular text. Tagging text is highly subjective, influenced by thoughts and beliefs, and also includes personal experience. Therefore, you can apply criteria and filters to all your data, improve their accuracy, and gain better insights using sentiment analysis. The sentiment analysis process mainly focuses on polarity, i.e., positive, negative, or neutral.

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Well, if it works well, then that will be relying on Natural Language Processing (NLP) with sentiment analysis to help identify the contextual meaning and nuance of what you are trying to translate. Say there is a sudden increase in negative reviews—your company can quickly identify the cause and take action to address it. Additionally, tracking online reputation over time can help you identify trends and make data-driven decisions.

Sentiment analysis APIs

Google Cloud Natural Language API offers advanced NLP capabilities, including sentiment analysis. To use Google sentiment analysis in Python, you will need to set up a Google Cloud project, enable the Natural Language API, and obtain an API key. Printing the first five rows will help you check the column names of your dataset. Inductive transfer learning has greatly impacted computer vision, but existing approaches in NLP still require task-specific modifications and training from scratch. Feel free to check our article to learn more about sentiment analysis methods. Brand Monitoring offers us unfiltered and invaluable information on customer sentiment.

nlp sentiment analysis

It is a data visualization technique used to depict text in such a way that, the more frequent words appear enlarged as compared to less frequent words. This gives us a little insight into, how the data looks after being processed through all the steps until now. But, for the sake of simplicity, we will merge these labels into two classes, i.e. As the data is in text format, separated by semicolons and without column names, we will create the data frame with read_csv() and parameters as “delimiter” and “names”.

The Role of Natural Language Processing in Employee Sentiment Analysis

Here, the sentiment analysis system consists of a classification problem where the input will be the text to be analyzed. It will return a polarity if the text, for example, is positive, negative, or neutral. A large amount of data that is generated today is unstructured, which requires processing to generate insights. Some examples of unstructured data are news articles, posts on social media, and search history. The process of analyzing natural language and making sense out of it falls under the field of Natural Language Processing (NLP).

  • It basically means to analyze and find the emotion or intent behind a piece of text or speech or any mode of communication.
  • Expertise in this project is in demand since companies want experts to use sentiment analysis to analyze their product reviews for market research.
  • Opinion mining searches for publicly available sources that mention your organization.
  • Natural language processing allows computers to interpret and understand language through artificial intelligence.
  • Those reports can show you how customers are responding to your social media activity.
  • It’s often used by businesses to detect sentiment in social data, gauge brand reputation, and understand customers.

Recent advances in Big Data have prompted healthcare practitioners to utilize the data available on social media to discern sentiment and emotions’ expression. Health Informatics and Clinical Analytics depend heavily on information gathered from diverse sources. Traditionally, a healthcare practitioner will ask a patient to fill out a questionnaire that will form the basis of diagnosing the medical condition. However, medical practitioners have access to many sources of data including the patients’ writings on various media. Natural Language Processing (NLP) allows researchers to gather such data and analyze it to glean the underlying meaning of such writings.

Step 1 — Installing NLTK and Downloading the Data

Further, these feature vectors generate the predicted tags like positive, negative, and neutral. Since the rule-based system does not consider how words are combined in the sequence, this system is very naive. However, new rules can be added to support the new expression and vocabulary of the system by using more advanced processing techniques. But these will also add complexity to the design and affect the previous results. The chaos based cryptographic algorithms have suggested some new and efficient ways to develop secure image encryption techniques.

  • Later after processing each word, it tries to figure out the sentiment of the sentence.
  • This way, you can identify and address the positive and negative aspects of your online reputation, and tailor your marketing, customer service, and product development strategies accordingly.
  • If your business is international with customers who natively speak languages other than English, this tool can be helpful.
  • That’s why it’s important that your NLP is capable of not only analyzing the individual statements, sentences, and words, but also being able to understand their placement and usage from a contextual standpoint.
  • This type of sentiment analysis helps to detect customer emotions like happiness, disappointment, anger, sadness, etc.
  • The corresponding dictionaries are stored in positive_tokens_for_model and negative_tokens_for_model.

You may be employing an off-the-shelf chatbot that applies basic filters to your customer conversations, but you also have the ability to train an AI model that will be customized for your specific business needs and language. Sentiment Analysis is a process of analyzing the sentiment of a piece of content, such as a review or social media post, to determine whether the way the creator perceives or feels is positive, negative, or neutral. On the other hand, Natural Language Processing is a field of study that focuses on how computers can process and analyze human language. For deep learning, sentiment analysis can be done with transformer models such as BERT, XLNet, and GPT3.

Sentiment Analysis: A Definitive Guide

Only features which are giving best decision for analysis have been selected in pre-processing task and Combination of best feature set will be used to classify reviews. On a daily basis, opinions influence our daily behaviors and are at the core of almost all human activities. NLP is used in many different types of data analytics processes, including the following. This is where natural language processing (NLP) and machine learning come into the picture.

Is NLP the same as sentiment analysis?

Sentiment analysis is a subset of Natural Language Processing (NLP). It is a data mining technique that measures and tries to understand people's opinions and stances through NLP. Computational linguistics and text analysis inspect information from the web, social media, and many other online sources.

For instance, the use of the word “Lincoln” may refer to the former United States President, the film or a penny. Everything from forums, blogs, discussion boards, and websites like Wikipedia encourages people to share their knowledge. Some see these platforms as an avenue to vent their insecurity, rage, and prejudices on social issues, organizations, and the government. Platforms like Wikipedia that run on user-generated content depend on user discussion to curate and approve content. Maintaining positivity requires the community to flag and remove harmful content quickly. AI/Machine Learning democratizes and enables real time access to critical insights for your niche.

Splitting the Dataset Into Training and Testing Sets

The secret of successfully tackling this issue is in deep context analysis and diverse corpus used to train the model. The thing with rule-based algorithms is that while it delivers some sort of results – it lacks flexibility and precision that would make them truly usable. For instance, the rule-based approach doesn’t take the context into account. However, it can be used for general purposes of determining the tone of the messages, which may come in handy for customer support. Figure 1 shows the distribution of positive, negative and neutral sentences in the data set. In this document, linguini is described by great, which deserves a positive sentiment score.

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The meaning of the same set of words can vary greatly depending on the context in which they are said. It could be impacted by the previous sentence or the specifics of certain technical language. Have you tried translating something recently and wondered how the program is understanding your original?

Sentiment analysis tools

Finally, you will use pickle5 to serialize and save the tokenizer object. Sentiment Analysis is the task of classifying the polarity of a given text. For instance, a text-based tweet can be categorized into either “positive”, “negative”, or “neutral”. Given the text and accompanying labels, a model can be trained to predict the correct sentiment. The era of getting valuable insights from surveys and social media has peaked due to the advancement of technology.

This is a popular way for organizations to determine and categorize opinions about a product, service or idea. Sentiment analysis is a classification task in the area of natural language processing. Sometimes called ‘opinion mining,’ sentiment analysis models transform the opinions found in written language or speech data into actionable insights. For many developers new to machine learning, it is one of the first tasks that they try to solve in the area of NLP. This is because it is conceptually simple and useful, and classical and deep learning solutions already exist.

nlp sentiment analysis

Your products and services can be improved, and you can make more informed decisions by automatically analyzing the customers’ feelings and opinions through social media conversations, reviews, surveys, and more. Tweets can be classified into different classes based on their relevance to the topic searched. Various Machine learning algorithms are currently employed in the classification of the tweets into positive and negative classes based on their sentiments, such as baseline, Navie Bayes Classifier, Support Vector Machine, etc. This project contains implementations of naive Bayes using sentiment 140 training data using the twitter database and proposes a method to improve the classification.

nlp sentiment analysis

What is sentiment analysis in Python using NLP?

What is Sentiment Analysis? Sentiment Analysis is a use case of Natural Language Processing (NLP) and comes under the category of text classification. To put it simply, Sentiment Analysis involves classifying a text into various sentiments, such as positive or negative, Happy, Sad or Neutral, etc.