Machine Learning with R by Brett Lantz

Author:Brett Lantz
Language: eng
Format: epub, pdf
Publisher: Packt Publishing

The correlation also seems to be substantially higher:

> cor(p.cubist, wine_test$quality) [1] 0.6201015

Furthermore, the model slightly reduced the mean absolute error:

> MAE(wine_test$quality, p.cubist) [1] 0.5339725

Although we did not improve a great deal beyond the regression tree, we surpassed the performance of the neural network model published by Cortez, and we are getting closer to the published mean absolute error value of 0.45 for the support vector machine model, all while using a much simpler learning method.

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