ggspectra (version 0.3.13)

stat_wb_label: Label ranges under spectral curve.

Description

stat_wb_label computes computes the center of a waveband. Sets suitable default aesthetics for "text" and "label" geoms displaying "boundaries" and "names" of wavebands.

Usage

stat_wb_label(
  mapping = NULL,
  data = NULL,
  geom = "text",
  w.band = NULL,
  chroma.type = "CMF",
  label.fmt = "%s",
  ypos.fixed = 0,
  position = "identity",
  na.rm = TRUE,
  show.legend = NA,
  inherit.aes = TRUE,
  ...
)

Value

A data frame with one row for each waveband object in the argument to w.band. Wavebeand outside the range of the spectral data are trimmed or discarded.

Arguments

mapping

The aesthetic mapping, usually constructed with aes or aes_. Only needs to be set at the layer level if you are overriding the plot defaults.

data

A layer specific dataset - only needed if you want to override the plot defaults.

geom

The geometric object to use display the data

w.band

a waveband object or a list of waveband objects or numeric vector of at least length two.

chroma.type

character one of "CMF" (color matching function) or "CC" (color coordinates) or a chroma_spct object.

label.fmt

character string giving a format definition for formating the name of the waveband. sprintf.

ypos.fixed

numeric If not NULL used a constant value returned in y.

position

The position adjustment to use for overlapping points on this layer

na.rm

a logical value indicating whether NA values should be stripped before the computation proceeds.

show.legend

logical. Should this layer be included in the legends? NA, the default, includes if any aesthetics are mapped. FALSE never includes, and TRUE always includes.

inherit.aes

If FALSE, overrides the default aesthetics, rather than combining with them. This is most useful for helper functions that define both data and aesthetics and shouldn't inherit behaviour from the default plot specification, e.g. borders.

...

other arguments passed on to layer. This can include aesthetics whose values you want to set, not map. See layer for more details.

Computed variables

x

w.band-midpoint

wb.xmin

w.band minimum

wb.xmax

w.band maximum

y

ypos.fixed or zero

wb.color

color of the w.band

wb.name

label of w.band

wb.label

formatted wb.name

Default aesthetics

Set by the statistic and available to geoms.

label

..wb.label..

x

..x..

xmin

..wb.xmin..

xmax

..wb.xmax..

fill

..wb.color..

Required aesthetics

Required by the statistic and need to be set with aes().

x

numeric, wavelength in nanometres

See Also

Other stats functions: stat_color(), stat_find_qtys(), stat_find_wls(), stat_label_peaks(), stat_peaks(), stat_spikes(), stat_wb_box(), stat_wb_column(), stat_wb_contribution(), stat_wb_hbar(), stat_wb_irrad(), stat_wb_mean(), stat_wb_relative(), stat_wb_sirrad(), stat_wb_total(), stat_wl_strip(), stat_wl_summary()

Examples

library(photobiologyWavebands)
# ggplot() methods for spectral objects set a default mapping for x and y.
ggplot(sun.spct) +
  geom_line() +
  stat_wb_box(w.band = VIS(), ymin = -0.04, ymax = 0,
  color = "black", fill = "white") +
  stat_wb_label(w.band = VIS(), ypos.fixed = -0.02, color = "black")

ggplot(sun.spct) +
  geom_line() +
  stat_wb_hbar(w.band = PAR(), ypos.fixed = 0, size = 1) +
  stat_wb_label(aes(color = ..wb.color..),
                w.band = PAR(), ypos.fixed = +0.025) +
  scale_color_identity()