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Machine Learning with Spark - Second Edition by Nick Pentreath, Manpreet Singh Ghotra, Rajdeep Dua

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Improving model performance and tuning parameters

So, what went wrong? Why have our sophisticated models achieved nothing better than random chance? Is there a problem with our models?

Recall that we started out by just throwing the data at our model. In fact, we didn't even throw all our data at the model, just the numeric columns that were easy to use. Furthermore, we didn't do a lot of analysis on these numeric features.

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