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"Charles is an HTTP proxy / HTTP monitor / Reverse Proxy that enables a developer to view all of the HTTP and SSL / HTTPS traffic between their machine and the Internet. This includes requests, responses and the HTTP headers (which contain the cookies and caching information)."
Good coding style is like using correct punctuation. You may think you can manage without it, but it sure makes things easier to read. As with styles of punctuation, there are many possible variations. The following guide describes the style that I use. It is based on Google's R style guide, with a few tweaks. You don't have to use it. However, you do need to have and to use a consistent style.
Good style is important because while your code only has one author, it'll usually have multiple readers. This is especially true when you're writing code with others. In that case, it's a good idea to agree on a common style up-front. Since no style is strictly better than another, working with others may mean that you'll need to sacrifice some preferred aspects of your style.
One package that makes sticking to a style easy is Yihui Xie's formatR. It can't do everything, but if you're starting with very poorly formatted R code, it can quickly get you to a better place. Make sure to read the notes on the wiki before using it."
"R is a tool for statistics and data modeling. The R programming language is elegant, versatile, and has a highly expressive syntax designed around working with data. R is more than that, though — it also includes extremely powerful graphics capabilities. If you want to easily manipulate your data and present it in compelling ways, R is the tool for you."