shadow_trail

0th

Percentile

A trail of evenly spaced old frames

This shadow will trace the movement in your animation by keeping every nth frame and will thus produce a breadcrumb-like trail. Note that the shadow frames will not be equidistant in space but in time (that is, if a point moves slowly the crumbs will be closer to each other). It is possible to modify the look of the shadow by changing the different graphic parameters in the data

Usage
shadow_trail(distance = 0.05, max_frames = Inf, ...,
  exclude_layer = NULL)
Arguments
distance

The temporal distance between the frames to show, as a fraction of the full animation length

max_frames

The maximum number of shadow frames to show

...

changes to the shadow data, e.g. alpha = alpha/2 or colour = 'grey'

exclude_layer

Indexes of layers that should be excluded.

See Also

Other shadows: shadow_mark, shadow_null, shadow_wake

Aliases
  • shadow_trail
Examples
# NOT RUN {
anim <- ggplot(airquality, aes(Day, Temp, colour = factor(Month))) +
  geom_point() +
  transition_time(Day)

# Change distance between points
anim1 <- anim +
  shadow_trail(0.02)

# Style shadow differently
anim2 <- anim +
  shadow_trail(alpha = 0.3, shape = 2)

# Restrict the shadow to 10 frames
anim3 <- anim +
  shadow_trail(max_frames = 10)

# }
Documentation reproduced from package gganimate, version 1.0.3, License: MIT + file LICENSE

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