Easing defines how a value change to another during tweening. Will it
progress linearly, or maybe start slowly and then build up momentum. In
gganimate, each aesthetic or computed variable can be tweened with
individual easing functions using the ease_aes() function. All easing
functions implemented in tweenr are available, see tweenr::display_ease
for an overview. Setting an ease for x and/or y will also affect the
other related positional aesthetics (e.g. xmin, yend, etc).
ease_aes(default = "linear", ...)The default easing function to use (defaults to 'linear')
Override easing for specific aesthetics
quadratic Models a power-of-2 function
cubic Models a power-of-3 function
quartic Models a power-of-4 function
quintic Models a power-of-5 function
sine Models a sine function
circular Models a pi/2 circle arc
exponential Models an exponential function
elastic Models an elastic release of energy
back Models a pullback and relase
bounce Models the bouncing of a ball
Modifiers
-in The easing function is applied as-is
-out The easing function is applied in reverse
-in-out The first half of the transition it is applied as-is, while in the last half it is reversed
anim <- ggplot(mtcars, aes(mpg, disp)) +
transition_states(gear, transition_length = 2, state_length = 1) +
enter_fade() +
exit_fade()
if (FALSE) {
# Default uses linear easing
animate(anim)
}
# Change all to 'cubic-in-out' for a smoother appearance
anim1 <- anim +
ease_aes('cubic-in-out')
if (FALSE) {
animate(anim1)
}
# Only change easing of y variables
anim2 <- anim +
ease_aes(y = 'bounce-in')
if (FALSE) {
animate(anim2)
}