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:

The cheat sheet comes courtesy of Vistat, a site that provides working recipes for statistical graphics. R programmers should also check out this cheat sheet for plotting symbols and colors for R graphics.

Vistat: Mathematical Notation in R (via Yihui Xie)

*Related*

To

**leave a comment** for the author, please follow the link and comment on his blog:

** Revolutions**.

R-bloggers.com offers

**daily e-mail updates** about

R news and

tutorials on topics such as: visualization (

ggplot2,

Boxplots,

maps,

animation), programming (

RStudio,

Sweave,

LaTeX,

SQL,

Eclipse,

git,

hadoop,

Web Scraping) statistics (

regression,

PCA,

time series,

trading) and more...

If you got this far, why not

__subscribe for updates__ from the site? Choose your flavor:

e-mail,

twitter,

RSS, or

facebook...