# Definitions for developers starting with letter R

**Learning Reinforcement**definition Definition in which the process is not given specific goals to meet but, as it makes decisions, is instead given indications of whether it’s doing compare**Ruby**definition Explain appeared in 1996. Ruby is popular in the data science community, but not as popular as Python, which has more specialized libraries what does it mean**Regression**definition What is any kind of model to any kind of data. This use of the term 'regression' is a historical accident; it is only indirectly related how works**Forest Random**definition Meaning classification that uses a collection of tree data structures. “To classify a new object from an input vector, put the input vector down why**Root Mean Squared Error**definition Abbreviation Squared Error. This is more popular than Mean Squared Error because taking the square root of a figure built from the squares of the determines**R**definition How to An open-source programming language and environment for statistical computing and graph generation available for Linux, Windows, and Mac comparing to

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