# Definitions for developers starting with letter R

**R**definition What is An open-source programming language and environment for statistical computing and graph generation available for Linux, Windows, and Mac**Forest Random**definition What is classification that uses a collection of tree data structures. “To classify a new object from an input vector, put the input vector down**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**Learning Reinforcement**definition What is 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**Root Mean Squared Error**definition What is Squared Error. This is more popular than Mean Squared Error because taking the square root of a figure built from the squares of the**Ruby**definition What is appeared in 1996. Ruby is popular in the data science community, but not as popular as Python, which has more specialized libraries

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Definition of Ruby, Root Mean Squared Error, Reinforcement Learning, Regression, Random Forest, R description.

What is Ruby, Root Mean Squared Error, Reinforcement Learning in web development.