>>What is R?
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>R is command-based. So I'd recommend you investigate R form within Rstudio. Installation of R and Rstudio is a breeze in most cases.
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https://www.rstudio.com/>
>Beware that R is not exactly a small shop tool. It's a complex do-it-all package for "big data" specialists with a strong background - possibly acquainted within academic circles - in statistics. But it's mostly free.
Heritage points to reimplementing "S" and "Splus" packages as free versions ;-)
In the tradition of SPSS, BMDP, SAS and other statistical packages, perhaps earlier than the others interested in generating visual results