R Shiny server dateRangeInput error -

i keep finding error

error: not find function "daterangeinput" whenever try run following application.

server.r

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library(shiny) library(ggplot2) library(shinyext)  shinyserver(function(input, output, session) {   output$date  <- rendertext({ as.character(input$date)  }) output$daterange  <- rendertext({ as.character(input$daterange) })  observe({ updatedateinput(session, 'date_controlled',                 value = as.character(input$date),                 min = as.character(input$daterange[1]),                 max = as.character(input$daterange[2]) )  updatedaterangeinput(session, 'daterange_controlled',                      min = as.character(input$daterange[1]),                      max = as.character(input$daterange[2]),                      start = as.character(input$daterange2[1]),                      end = as.character(input$daterange2[2]) )  })   }) 

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my ui.r

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library(shiny) library(ggplot2) library(shinyext)  # define ui application plots random distributions  shinyui(pagewithsidebar(  # application title headerpanel("kemri wellcome trust programme"),  # sidebar slider input number of observations sidebarpanel( imageoutput("logo", height = "153px", width="272px"), helptext("note: while data view show specified",          "number of observations, summary still based",          "on full dataset."),  selectinput("graph", "choose graph:",              list("histogram" = "hist",                   "pie chart" = "pie",                   "time series" = "time",                  "box plot"="box",                  "violin plot"="violin")), daterangeinput('daterange',                label = 'date range: dd/mm/yy, en, range limit, weekstart=1. controls start , end of date range input in main panel.',                start = sys.date()-1, end = sys.date()+1,                min = sys.date()-10, max = sys.date()+10,                separator = " - ",                format = "dd/mm/yy", startview = 'year', language = 'en', weekstart = 1),   submitbutton("update view")  #sliderinput("obs","number of observations:", min = 0, max = 1000, value = 500)  ),   # show plot of generated distribution  mainpanel(     dateinput("date_controlled",           "date input controlled sidebar"),    daterangeinput("daterange_controlled",                "date range input controlled sidebar")      )  )) 

what problem?? using latest stable shiny-server , r 3.0.x. examples i've seen work, why doesn't 1 work?

the daterangeinput in newer version of shiny on cran. can install shiny's github repo these steps:

install.packages('httpuv', repos=c(rstudio='http://rstudio.org/_packages', cran='http://cran.rstudio.com')) install.packages('devtools')  # if don't have devtools installed devtools::install_github('shiny', 'rstudio') 

after following these steps, sure restart r process before try again.