# ease_aes

##### Control easing of aesthetics

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).

##### Usage

`ease_aes(default = "linear", ...)`

##### Arguments

- default
The default easing function to use (defaults to

`'linear'`

)- ...
Override easing for specific aesthetics

##### Easing functions

**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

##### Examples

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

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