Area chart does not render

[avrenli2]

The animated chart does not render properly and it creates the following error messages:

Error occurred in the 1st layer.
Caused by error in unit():
'x' and 'units' must have length > 0
Problem while converting geom to grob.

library(ggplot2)
library(Rcpp)
library(gifski)
library(gganimate)
library(transformr)

library(quantmod)
CHAI <- getSymbols("SBUX" , from="2020-1-1" , to="2021-1-1" , auto.assign=F) 

CATROON <- ggplot(CHAI, aes(y=SBUX.Close,x=index(CHAI)))+
  geom_area(color="pink", size=1.2 , fill="pink" , alpha=0.3)+
  geom_point(color="#8F157E", size=4)+
  labs(x="Time", y="Close Price")+
  theme_bw() + transition_reveal(index(CHAI))  

animate(CARTOON, duration=7 , fps = 30)

[DavisVaughan]

See more information in r-lib/vctrs#1778

[thomasp85]

this is not really an issue with vectors but an incompatibility between the way gganimate works and the new stat_align()

A quick fix is to let geom_area() use stat_identity() as in the old days

CARTOON <- ggplot(CHAI, aes(y=SBUX.Close,x=index(CHAI)))+
  geom_area(color="pink", size=1.2 , fill="pink" , alpha=0.3, stat = "identity")+
  geom_point(color="#8F157E", size=4)+
  labs(x="Time", y="Close Price")+
  theme_bw() + transition_reveal(index(CHAI))  

animate(CARTOON, duration=7 , fps = 30)

[thomasp85]

This particular combination (stat_align() and transition_reveal()) now throws an error with information on how to fix it

another fix is to transition after the stat has been applied using transition_reveal(after_stat(x))