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Apache Spark Machine Learning Blueprints

You're reading from   Apache Spark Machine Learning Blueprints Develop a range of cutting-edge machine learning projects with Apache Spark using this actionable guide

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Product type Paperback
Published in May 2016
Publisher Packt
ISBN-13 9781785880391
Length 252 pages
Edition 1st Edition
Languages
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Author (1):
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Alex Liu Alex Liu
Author Profile Icon Alex Liu
Alex Liu
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Table of Contents (13) Chapters Close

Preface 1. Spark for Machine Learning FREE CHAPTER 2. Data Preparation for Spark ML 3. A Holistic View on Spark 4. Fraud Detection on Spark 5. Risk Scoring on Spark 6. Churn Prediction on Spark 7. Recommendations on Spark 8. Learning Analytics on Spark 9. City Analytics on Spark 10. Learning Telco Data on Spark 11. Modeling Open Data on Spark Index

Model evaluation


In the last section, we completed our model estimation. Now, it is the time for us to evaluate these estimated models to check whether they fit the city's criterions so that we can either move to the results explanation or go back to some previous stages to refine our predictive models.

To perform our model evaluation, in this section, we will mainly use root mean square error (RMSE) to assess our models for both the regression and time series models. While other measures, such as MSE, can also be used to assess models, as an exercise, we will focus on RMSE as the processes of using other measures are similar.

When working on this real-life project, as mentioned in the Methods of service forecasting section of this chapter, we also used decision tree and random forest models, for which we should use a confusion matrix and error ratios to evaluate. Here, we will not discuss these model evaluation methods as they are used a few times in the previous chapters, such as in Chapter...

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