R package ‘ggpmisc’
Please, see the web site r4photobiology for details and update notices.
Other packages, aimed at easing photobiology-related calculations including the quantification of biologically effective radiation in meteorology are available as part of a suite described at the same website.
stat_poly_eq Add a label for a fitted linear model to a plot.
: Miscellaneous Extensions to ‘ggplot2’