Plot spectra

Source: R/plot.rspec.R

Plots reflectance spectra in different arrangements.

# S3 method for rspec
plot(
  x,
  select = NULL,
  type = c("overlay", "stack", "heatmap"),
  varying = NULL,
  n = 100,
  labels.stack = NULL,
  wl.guide = TRUE,
  ...
)

Arguments

x

(required) a data frame, possibly an object of class rspec, with a column with wavelength data, named 'wl', and the remaining column containing spectra to plot.
select

specification of which spectra to plot. Can be a numeric vector or factor (e.g., sex=="male")
type

what type of plot should be drawn. Possibilities are:

  • overlay (default) for plotting multiple spectra in a single panel with a common y-axis.

  • stack for plotting multiple spectra in a vertical arrangement.

  • heatmap for plotting reflectance values by wavelength and a third variable (varying).
varying

a numeric vector giving values for y-axis in type = "heatmap".
n

number of bins with which to interpolate colors and varying for the heatplot.
labels.stack

a vector of labels for the stacked spectra when using type = "stack". Defaults to the numeric column ID's.
wl.guide

logical determining whether visible light spectrum should be added to the x-axis.
...

additional arguments passed to plot() (or image() for "heatmap").

See also

spec2rgb(), image(), plot()

Author

Thomas White thomas.white026@gmail.com

Hugo Gruson

Chad Eliason cme16@zips.uakron.edu

Examples

# Load angle-resolved reflectance data for a green-winged teal
data(teal)

# Create an overlay plot (default)
plot(teal)


# Create an stacked spectral plot
plot(teal, type = "stack")


# Create a reflectance heatmap
plot(teal, type = "heatmap")

#> No varying vector supplied; using arbitrary values