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03_​Sentiment_​Classification

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Sentiment Analysis (Classification) of Documents

This workflow shows how to import text from a csv file, convert it to documents, preprocess the documents and transform them into numerical document vectors. Finally two predictive models are trained on the vectors to predict the sentiment class of the documents.

URL: Sentiment Classification of Documents http://www.knime.org/blog/sentiment-analysis
URL: Read more about "Lexicon-based sentiment analysis: A tutorial" https://www.knime.com/blog/lexicon-based-sentiment-analysis

Data Import and Preprocessing Predictive Modeling and Scoring Extract sentimentlabelColor by sentimentlabelTraining / test setTransformation of strings to documentsPreprocessing of documentsCreate bit vectorsfor documentsRead IMDb reviewsfrom CSV file Category to Class Color Manager Partitioning Decision TreePredictor Document Creation Preprocessing DecisionTree Learner Document Vector CSV Reader XGBoost Predictor Column Appender Column Filter Scorer Scorer ROC Curve(JavaScript) XGBoost TreeEnsemble Learner Data Import and Preprocessing Predictive Modeling and Scoring Extract sentimentlabelColor by sentimentlabelTraining / test setTransformation of strings to documentsPreprocessing of documentsCreate bit vectorsfor documentsRead IMDb reviewsfrom CSV file Category to Class Color Manager Partitioning Decision TreePredictor Document Creation Preprocessing DecisionTree Learner Document Vector CSV Reader XGBoost Predictor Column Appender Column Filter Scorer Scorer ROC Curve(JavaScript) XGBoost TreeEnsemble Learner

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To use this workflow in KNIME, download it from the below URL and open it in KNIME:

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Created by: Kilian
Created at: 2014-11-08
On NodePit since: 2024-01-22
Last update: 2024-11-21
Created with KNIME version: v5.2.0
Tags: sentiment analysisNLPNatural Language Processingtext classificationPracticing Data Science

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