Here you will find daily news and tutorials about R, contributed by over 750 bloggers.
There are many ways to follow us - By e-mail:On Facebook: If you are an R blogger yourself you are invited to add your own R content feed to this site (Non-English R bloggers should add themselves- here)

If you're creating a scientific graphic in the R language, there's a good chance you'll be wanting to include some mathematical symbols somewhere on the chart. You might want to use a symbol like μ as an axis label, annotate a curve with simple math like x^{2}, or even put a complete equation like:

in the title. You can do this easily in R using the plotmath syntax. Using escape sequences reminiscent of LaTeX, you can include beautifully-formatted mathematical symbols and equations in charts wherever you can place text. For example, the summation above can be added to a plot with an R statement like text(2,5,expression(sum(x[i], i=1, n)). This cheat sheet on mathematical annotation in R provides a guide to commonly-used symbols and equations, including: