eyesim colour scales

`scale_fill_eyesim_density()` is the sequential density scale used by the density plots. Opacity is part of the ramp and is anchored at zero density, so zero is transparent (a background stimulus shows through) and the colour bar shows exactly what is drawn. Set shared `limits` to compare conditions on one scale. `scale_colour_eyesim_time()` is the fixation-order/onset scale.

Usage

scale_fill_eyesim_density(
  ...,
  name = "Fixation\ndensity",
  limits = c(0, NA),
  transparent = TRUE,
  aesthetics = "fill"
)

scale_colour_eyesim_time(..., aesthetics = "colour")

Arguments

...

Passed to [ggplot2::scale_fill_gradientn()] or [ggplot2::scale_colour_gradientn()].

name

Legend title.

limits

Scale limits. The default starts the density scale at zero.

transparent

Whether low densities fade to transparent.

aesthetics

Aesthetics the scale applies to.

Value

A ggplot2 scale.

See also

Other visualization: anim_scanpath(), element_text_wrap(), eyesim_colours(), plot.eye_density(), plot.fixation_group(), theme_eyesim()

Examples

fg <- fixation_group(x = c(100, 200, 300), y = c(100, 150, 200),
                     onset = c(0, 200, 400), duration = c(200, 200, 200))
ed <- eye_density(fg, sigma = 50, xbounds = c(0, 400), ybounds = c(0, 300))
# Put several maps on one scale by giving them the same limits
plot(ed, limits = c(0, 1e-4))