Changing interval yields error

[ronammar]

Any idea why I am getting the following error? Thanks!

From the code example in the README:

library(gapminder)
library(ggplot2)
theme_set(theme_bw())

p <- ggplot(gapminder, aes(gdpPercap, lifeExp, size = pop, color = continent, frame = year)) +
  geom_point() +
  scale_x_log10()

library(gganimate)

gganimate(p)  # works

The following then throws an error:

gganimate(p, interval = .2)
# Error in check.options(new, name.opt = ".X11.Options", envir = .X11env) : 
#  invalid argument name ‘interval’ in 'grDevices::png(..., res = dpi, units = "in")'

[dgrtwo]

We are finishing a complete rewrite of gganimate undertaken by Thomas Pedersen, with massive breaking changes to the API (this will come with a version bump to 1.0.0; currently 0.9.9.9999). This fixes many existing bugs and installation difficulties, and offers a more intuitive grammar of graphics.

As a result I'm closing almost all open issues, since they aren't relevant to the new version (bug reports in particular no longer apply). I apologize for any inconvenience in updating your existing code, but the new version of gganimate will be well worth the effort.

• If you are still interested in this issue and believe it is relevant to the new version of gganimate, you can reopen it!

• If you'd like to continue using the old gganimate version (which we do not recommend, as it will not be maintained), you can install from this release using the following code:

  devtools::install_github("dgrtwo/gganimate", ref = "v0.1.1”)