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", ...)

default | The default easing function to use (defaults to |
---|---|

... | 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()# NOT RUN { # Default uses linear easing animate(anim) # }# Change all to 'cubic-in-out' for a smoother appearance anim1 <- anim + ease_aes('cubic-in-out')# NOT RUN { animate(anim1) # }# Only change easing of y variables anim2 <- anim + ease_aes(y = 'bounce-in')# NOT RUN { animate(anim2) # }