I have to admit that I find the
plotmathexpressions in R a little fiddly to annotate plots with mathematical notation.
Apparently I am not the only one, but Stefano Meschiari did actually something about it. A few days ago his package
latex2expappeared on CRAN.
The package provides the wonderful function
latex2expthat translates LaTeX code into
plotmathexpressions. Brillant! All I have to remember is to escape the
""character, that is write
Below is the first example from the
plotmathhelp file and again using
latex2exp. I think this is much easier to read and write.
You find more information about
latex2expon Stefano’s web site and his GitHub repository.
R version 3.2.1 (2015-06-18) Platform: x86_64-apple-darwin13.4.0 (64-bit) Running under: OS X 10.10.4 (Yosemite) locale:  en_GB.UTF-8/en_GB.UTF-8/en_GB.UTF-8/C/en_GB.UTF-8/en_GB.UTF-8 attached base packages:  stats graphics grDevices utils datasets methods base other attached packages:  latex2exp_0.3.1 loaded via a namespace (and not attached):  magrittr_1.5 tools_3.2.1 Rcpp_0.11.6 stringi_0.5-5 stringr_1.0.0