Learn How to Do Sentiment Analysis with Deep Learning

Sentiment analysis is a powerful text analysis tool that automatically mines unstructured data (social media, emails, customer service tickets, and more) for opinion and emotion, and can be performed using machine learning and deep learning algorithms. 

Deep learning (DL) is considered an evolution of machine learning. It chains together algorithms that aim to simulate how the human brain works, otherwise known as an artificial neural network, and has enabled many practical applications of machine learning, including customer support automation and self-driving cars.

Let’s take a closer look at sentiment analysis with deep learning, and show you how easy it is to get started. Jump to one of the sections, below, or keep reading.

What Is Sentiment Analysis With Deep Learning?

Sentiment analysis is the classification of emotions (positive, negative, and neutral) within data using text analysis techniques. Harnessing the power of deep learning, sentiment analysis models can be trained to understand text beyond simple definitions, read for context, sarcasm, etc., and understand the actual mood and feeling of the writer. For example:

Tweet: “I’m not sure who designed the new Facebook UI, but I don’t think it was an actual UX designer.”

Based on word definitions, alone, the above tweet wouldn’t give us much information. But when run through a well-trained sentiment analyzer, the program would understand that this is definitely a negative tweet. 

In order to exploit the full power of sentiment analysis tools, we can plug them into deep learning models. As we mentioned earlier, deep learning is a study within machine learning that uses “artificial neural networks” to process information much like the human brain does. 

Deep learning is hierarchical machine learning that uses multiple algorithms in a progressive chain of events to solve complex problems and allows you to tackle massive amounts of data, accurately and with very little human interaction.

Deep learning and machine learning are sometimes used interchangeably. Deep learning is, indeed, machine learning, but it is more advanced. When basic machine learning makes a mistake, human input is required to correct it – to change the output and “force” the model to learn. In deep learning, however, the neural network can learn to correct itself through its advanced algorithm chain.

Graph showing that deep learning can perform more accurately and analyze more data than traditional algorithms.

That said, the initial training of a deep learning model is extremely time-consuming and often requires millions of data points until it begins to learn on its own. To continue with the comparison to the human brain, think about how long it takes a child to build correct sentence structure or learn basic math. However, once they do, they can learn more advanced language or mathematics on their own because they have learned the essential rules and processes.

Once fully trained to effectively teach themselves, machine learning models can perform phenomenal feats. Text analysis, for example, uses natural language processing (NLP) to break down language and understand it much as a human would: subject, verb, object, etc. It’s not until the computer has broken a sentence down, mathematically, can it move on to other analytical processes. 

And, of course, it’s much more complex than simply dissecting a sentence into subject, verb, object, and moving on. Successful NLP models have taken years to train. However, with the use of NLP, deep learning models can break sentences, paragraphs, and entire documents into individual opinion units:

Once broken into opinion units, the model could perform topic classification to organize each statement into predefined categories, like Usability (Opinion Unit 1), Functionality (Opinion Unit 2), and Support (Opinion Unit 3).

From there, the deep learning model can perform sentiment analysis on each statement by topic: “like the new update” – Positive; “seems really slow” – Negative; “can’t get tech support on the phone” – Negative.

Now we have sentiment analysis performed on our topic categories:

  • Usability: Positive
  • Functionality: Negative
  • Support: Negative

Imagine this kind of deep learning analysis performed on thousands of customer reviews, social media posts, questionnaires, etc. You can get a broad overview or hundreds of detailed insights.

Now, it’s time for you to have a go at using sentiment analysis on your own data. Follow the tutorial below to learn how easy it is to use sentiment analysis with deep learning.

Sentiment Analysis With Deep Learning Tutorial

Sentiment analysis models become even more accurate when you train them to the specific needs and language of your business. To get the results you need, there are two options: build your own model or buy a SaaS tool.

Building your own tool can be effective if you have years of data science and coding experience behind you, but it takes a lot of time and can end up costing hundreds of thousands of dollars. SaaS tools, on the other hand, require little to no code, can be implemented in minutes to hours, and are much less expensive, as you only pay for what you need.

MonkeyLearn is a powerful SaaS platform with sentiment analysis (and many, many more) tools that can be put to work right away to get profound insights from your text data. Try the pre-trained sentiment analysis model to see how it works or follow along to learn how to build your own model with your own data and criteria.

1. Choose your model

Sign up for free at MonkeyLearn to get started. Once you’ve signed up, go to the dashboard and click ‘Create a model’, then click ‘Classifier,’:

The option to choose an extractor or classifier in MonkeyLearn’s model builder.

2. Choose your classifier

Choose ‘Sentiment Analysis’:

The option to choose from three classifiers: topic, sentiment and intent.

3. Import your data

You can import data from an app or upload a CSV or Excel file. This will be used to train your sentiment analysis model. For this example, we’re using a CSV dataset of reviews of Facebook. 

If you don’t have a dataset at the ready, you can click into ‘Data Library’ to download a sample. Or connect directly to Twitter and search by handle or keyword.

A selection of apps and sources you can click on to connect and upload your data.

If your file has more than one column, choose the column you’d like to use.

The option to choose which column to analyze.

4. Tag text to train your sentiment analyzer

Tag each piece of text as Positive, Negative, or Neutral to train your model based on sentiment. Once you tag a few, the model will begin making its own predictions. Correct them, if the model has tagged them wrong:

Showing how text is tagged as "Positive," "Negative," or "Neutral."

If you accidentally tag incorrectly, you can click ‘PREV’ to return and correct it. And if a piece of text is irrelevant you can ‘SKIP’ it.

5. Test your sentiment analyzer

Once you’ve trained your model with some examples, you’ll need to name it. Then you can test it with new text to see how it’s classified. 

Showing how to return to 'Build," to more thoroughly train the model.

If it’s still not performing accurately, click ‘Build’ to continue training your model. The more you train your sentiment analyzer, the better it will perform.

MonkeyLearn shows a number of sentiment analysis statistics to help understand how well the model is working, and the word cloud helps visualize the most used words.

You’ll see overall statistics or click through to see by Negative, Positive, and Neutral, individually.

A window showing the sentiment analysis model's statistics.

6. Put your machine learning to work

Once your model is trained, you can upload huge amounts of data. MonkeyLearn offers three ways to upload your data:

  • Batch Analysis: upload a CSV or Excel file with new text. MonkeyLearn will process the data and automatically provide your sentiment analysis results.
  • Integrations: MonkeyLearn offers simple integrations with apps you probably already use:

List of available integrations at MonkeyLearn

  • API: easy programming for quick plug-in analysis:

But that’s not all. MonkeyLearn allows you to get even more granular with your sentiment analysis insights.

Take Your Sentiment Analysis to the Next Level

You can uncover even more insights from your data when you connect multiple machine learning techniques to work in concert.

MonkeyLearn Studio allows you to do this automatically to get a deeper understanding of your data. There are many templates you can choose from, whether analyzing social media posts or customer reviews about your brand.  

Each template consists of text classification models, which organize data into categories and sentiment so you can see which topics customers mention in a negative or positive way.

Keyword extraction is another useful machine learning tool that pulls the most important and most used words from a text and can be used to summarize a text or recognize main topics. After you’ve performed sentiment analysis, you could use keyword extraction to pull the most important keywords and phrases to dig even deeper into customer sentiments. 

When you have your models trained and systems set up, MonkeyLearn allows you to connect all of these advanced machine learning techniques to work step-by-step in MonkeyLearn Studio.

MonkeyLearn Studio flowchart: “choose a business template,” “import your data,” “run your analysis,” “visualize data.”

1. Choose a template. 

MonkeyLearn studio offers a variety of templates to choose from (or create your own), each template a different “chain” of machine learning models, with each new model activated after the previous step. Use pre-trained analyzers or build your own, often in just a few minutes.

There are nearly endless configurations of how a template could work, but they all follow a similar workflow:

  1. Opinion Unit Extractor (to make data more manageable)
  2. Classification Models (like a sentiment analyzer to categorize data)
  3. Text Extraction Model (like, a keyword extractor to pull the most used words)
  4. Visualization (see below). 

2. Import your data. 

Upload a file or set up one of the many easy-to-use integrations.

3. Run the analysis.

Once you’ve uploaded your data, your deep learning analysis will begin working automatically.

4. Visualize your data.

MonkeyLearn Studio is an all-in-one text analysis and data visualization tool that brings the entirety of your data together into a striking and easy-to-follow view. The below is a sample MonkeyLearn Studio dashboard showing an in-depth analysis of reviews of the application, Zoom.

See how the reviews are separated into classification categories (Usability, Reliability, etc.), then are broken into sentiment by category. Notice how categories and sentiments change over time and text from the actual reviews is listed by date.

There is also a breakdown of intent classification, an analysis that reads text to output the purpose or objective of the text. In this case, of course, the highest intent is for Opinion, as these are reviews of software. 

With other use cases, like reading email responses, intent classification can automatically group emails into categories, like Interested, Not Interested, Autoresponder, Email Bounce, etc., and then route them to the proper employee or simply discard them.

Data visualization tools can pull all of your data together and simplify it, so you can get a broad view or dig into the minute details. Find patterns, relationships, and insights that wouldn’t otherwise be clear in a simple spreadsheet or standalone chart or graph. Furthermore, unlike other business intelligence software, MonkeyLearn Studio allows you to perform and tweak your analyses right in the dashboard.

The Takeaway

Sentiment analysis offers undeniable analytical results, whether from regular documents, business reports, social media monitoring, customer support tickets, and more. And deep learning allows you to put more powerful algorithms and more tools to work on your data. 

When employed with user-friendly and in-depth visualization tools, like MonkeyLearn Studio, you can create captivating data stories to prove your brand’s worth and help push your business forward. MonkeyLearn Studio is the only all-in-one text analysis solution that can take you from model training to text analysis, and on to full-blown data visualization in just a few steps.

MonkeyLearn is a SaaS platform with dozens of deep learning tools to help you get the most from your data. 

Try some of MonkeyLearn’s text analysis tools for free to see how it works:

Or request a demo to see what MonkeyLearn Studio can do to get the most out of your text data.

Inés Roldós

Inés Roldós

Marketing @MonkeyLearn. Business Administration student.

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