我一直发现这个错误
错误:每当我尝试运行以下应用程序时都找不到函数“dateRangeInput”。
服务器.R
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])
)
})
})
我的ui.R
library(shiny)
library(ggplot2)
library(shinyExt)
# Define UI for application that plots random distributions
shinyUI(pageWithSidebar(
# Application title
headerPanel("KEMRI Wellcome Trust Programme"),
# Sidebar with a slider input for number of observations
sidebarPanel(
imageOutput("logo", height = "153px", width="272px"),
helpText("Note: while the data view will show only the specified",
"number of observations, the summary will still be based",
"on the full dataset."),
selectInput("graph", "Choose a 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 and 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 a plot of the generated distribution
mainPanel(
dateInput("date_controlled",
"Date input controlled from sidebar"),
dateRangeInput("daterange_controlled",
"Date range input controlled from sidebar")
)
))
可能是什么问题呢??我正在使用最新的稳定闪亮服务器和 R 3.0.x。我见过的所有示例都有效,那么为什么这一个无效?