install.packages(c("devtools","RJSONIO", "knitr", "shiny", "httpuv"))
library(devtools)
install_github("mages/googleVis")
cl1 <- gvisCalendar(Cairo, datevar="Date",
numvar="Temp",
options=list(width=1000))
plot(cl1)
Talvez seria um problema de locale...