I am using the code given in this answer to generate this plot
library(rvest)
cachedir <- \"cache\"
if (!dir.exists(cachedir)) dir.create(cachedir)
URL <
With this line, you are calling the base R plot
plot("Confirmed", "Last_update", Atlantic, xaxt='n')
And plot a character versus another character, which is not going to work. So most likely you need something like this:
with(as.data.frame(Atlantic),plot(Last_Update,Confirmed,xaxt="n"))
axis.POSIXct(1,at=Atlantic$Last_Update,
labels=format(Atlantic$Last_Update,"%y-%m-%d"),las=2)