Sentiment analysis determines whether the opinion that the writer expressed in a piece of text is positive, neutral, or negative. Knowledge about customers' sentiments can be very important because customers often share their opinions, reactions, and attitudes toward products and services in social media or communicate directly through chat channels.

• Setting up a sentiment analysis model

  Start the build process of a sentiment analysis model in Prediction Studio by selecting the model type and the language of the model that you want to build.

• Preparing data for sentiment analysis

  In the Lexicon selection step, select the sentiment lexicon to use for sentiment analysis. Sentiment lexicons contain features that are used to enhance the accuracy of the model.

• Uploading data for training and testing of the sentiment analysis model

  In the Source selection step, select the source for training and testing data that is required to create a model.

• Defining the training set and training the sentiment analysis model

  In the Sample construction step, split the data into the set that is used to train the model and the set that is used to test the model's accuracy.

• Reviewing the sentiment analysis model

  When a model is created, analyze its accuracy in the Model analysis step.

• Saving the sentiment analysis model

  In the Model selection step, export the file with the model or save the model as a Decision Data rule to use that model as part of the Pega Platform text analytics feature.

• Analyzing natural language
• Text analytics accuracy measures
• Testing text analytics models