## Animations generated in R version 3.2.3 (2015-12-10)
##   using the package animation
library(animation)
library(pitchRx)
library(ggplot2)
library(dplyr)
animateFX(lackey, layer = x)
## R version 3.2.3 (2015-12-10)
## Platform: x86_64-w64-mingw32/x64 (64-bit)
## Other packages: animation 2.4, pitchRx 1.8.2, ggplot2 2.0.0, dplyr 0.4.3

## Animations generated in R version 3.2.3 (2015-12-10)
      ##   using the package animation
      library(animation)
      library(DBI)
      library(dplyr)
      library(pitchRx)
      library(ggplot2)
      animateFX(lackey, avg.by = "pitch_types", layer = list(theme_bw(), 
          facet_grid(. ~ stand)))
      ## R version 3.2.3 (2015-12-10)
      ## Platform: x86_64-w64-mingw32/x64 (64-bit)
      ## Other packages: animation 2.4, DBI 0.3.1, dplyr 0.4.3, pitchRx 1.8.2, ggplot2 2.0.0