Cheat Sheet by Language R

Many have heard about R - a programming language and a system of statistical calculations. The language is very popular abroad, but in Russia, unfortunately, they write relatively little on it. Yes, and resources in Russian can be counted on the fingers. I believe that the situation needs to be somehow corrected.
On the official site there is such a wonderful thing as R reference card . The basic R packages contain many very useful functions that make programming really fast and concise. But beginners, as a rule, do not know most of the finest functions. And there is no place to find out - manuals are very large, few people read them completely. But the R reference card allows you to make a quick trip through the main functionality and make a lot of useful things for yourself.
I decided to translate this wonderful document into Russian. But not just translate, but make it a little better. I changed the structuring a bit, put a link to the documentation for each function, removed redundant descriptions.
I suggest you familiarize yourself with the result . Ready for any comments and suggestions to make this list even better. I hope that this review of R will be useful for many people who have decided to start writing in this beautiful language.
I would also like to say a few words about the packages. There are a lot of packages in R. Only in the standard repository of their 4300+ . Unfortunately, many useful packages are little known, because nobody writes anything about them. No, well, of course there are manuals. But manuals come in handy mostly when you are already using the package, and you, for example, need to clarify some nuances in using a function or something like that. But the overview of the package on the manual is not so easy to get.
In addition, I am often saddened that there are no pictures in the manuals. To really understand what this or that function draws, you need to run each example using pens.
Therefore, in the foreseeable future, I plan to compile popular descriptions (with pictures and examples) of some useful packages. Reviews will be posted here . I will start with the packages I use myself, but if you have applications for some packages that you love, then please in the comments.