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Dr. Justin Washtell's Blog – November 2014 Archive (2)

Trust The Algorithms, Not The Data.

One mantra we chant frequently is "trust the data". In the context that we use this expression it is often wise. For example: when requested for the facility to adjust the rules of a robustly tested machine-learnt model so that it better jibes with intuition; or when tempted to cherry-pick fields and features which one assumes (be it through years of domain experience or otherwise) enshrine the relevant information.

This doesn't mean that the data is always right of…


Added by Dr. Justin Washtell on November 16, 2014 at 4:30am — 2 Comments

3 Must-Ask Questions Before Choosing That Machine Learning Algorithm!

You know that you want to build a predictive model. You've framed your problem in terms of classification or regression. You've prepared some training data (which took an age). Now there's just the small matter of choosing an appropriate algorithm.

You've heard or experienced first hand that Random Forests, Elastic Net Regression or Deep Belief Networks are "the business" and so you're going to use one of these (you've probably already verified that these algorithms are appropriate to…


Added by Dr. Justin Washtell on November 3, 2014 at 3:00pm — 3 Comments

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