ggspectra

https://cran.rstudio.com/web/packages/ggspectra/

ggspectra extends ggplot2 with stats, geoms and annotations suitable for light spectra. It also defines ggplot() and plot() methods specialized for the classes defined in package photobiology for storing different types of spectral data.

# Example from https://cran.rstudio.com/web/packages/ggspectra/vignettes/user-guide.html
library(ggplot2)
library(photobiology)
library(photobiologyWavebands)
library(ggspectra)

# We bind two spectra, to later on demonstrate grouping.
two_suns.spct <- rbindspct(list(sun1 = sun.spct, sun2 = sun.spct * 2))

# We change the default theme.
theme_set(theme_bw())

# ggplot() methods for spectra
ggplot(sun.spct) + geom_line()

# It is possible to the defaults by means of + and aes() as shown below.
ggplot(two_suns.spct) + aes(color = spct.idx) + geom_line()

# Several ggplot stats are defined by this package, for example:
ggplot(sun.spct) + geom_line() + 
  stat_peaks(shape = 21) + scale_fill_identity()