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Object Oriented programming with R - S4

Object is a set of variables and functions = slot

We need :

• to define the object --> setClass and type the object
• to define the function --> setMethod

Oriented object programmation:

• prevent to add a character to a numeric
• allows to check if the object follow some rules
• enable to define one object like Inherit from the properties of another object, thus becoming its son --> contains
• allow to define all the tools concerning the object and to lock them up in blockss, without habing to look after anymore = encapsulation