sliderInput:: Use sep, pre, and post instead.
format 인수는 deprecated되고,
대신 sep, pre, and post 를 사용한다.
library("shiny")
runExample("05_sliders")
The `format` argument to sliderInput is deprecated
@param sep Separator between thousands places in numbers.
@param pre A prefix string to put in front of the value.
@param post A suffix string to put after the value

sliderInput("range", "Range:",
min=1, max=1000, value= c(200,500),
pre="$", sep=",", post=".00",
animate=animationOptions(interval=1, loop=T), step=50),
timeformat
https://github.com/samsonjs/strftime
timeFormat = ‘%m/%d %H:%M:%S’ #02/05 15:16:33