The following is an introduction for producing simple graphs with the R Programming Language. Each example builds on the previous one. The areas in bold indicate new lines which were added from the previous example. The graph produced by each example is shown on the right.

Writing an interpreter or a compiler is one of the most educational tasks in programming because you can become familiarized with the details of the code interpretation and evaluation process. You can obtain much deeper knowledge of what sorts of things are going on behind the scenes and gain some insights into the decisions behind language design.

This document aims to refresh one's memory of Ruby syntax, semantics, common operations, and standard libraries as quickly and efficiently as possible. The reader is expected to have some past experience with the Ruby language.

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