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Scala: Guide for Data Science Professionals by Patrick R. Nicolas, Arun Manivannan, Pascal Bugnion

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The Kalman filter

The Kalman filter is a mathematical model that provides an accurate and recursive computation approach to estimate the previous states and predict the future states of a process for which some variables may be unknown. R. E. Kalman introduced it in the early 60s to model dynamics systems and predict trajectory in aerospace [3:10]. Today, the Kalman filter is used to discover a relationship between two observed variables that may or may not be associated with other hidden variables. In this respect, the Kalman filter shares some similarities with the Hidden Markov models (HMM) described in Chapter 6, Regression and Regularization [3:11].

The Kalman filter is used as:

  • A predictor of the next data point from the current observation ...

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