我正在使用dplyr构建多个lm()模型。我想允许用户在Shiny应用程序中更改自变量值 - 通过shiny :: sliderInput()。但只有在“适合度”说R ^ 2大于阈值时才这样做 - 否则禁用滑块。我试过使用shinyjs :: disable()函数。见下文,但无法使其发挥作用。关于我做错了什么的任何想法?
library(shiny)
library(shinyjs)
# Define UI for application that draws a histogram
ui <- shinyUI(fluidPage(
sidebarLayout(
sidebarPanel(
sliderInput("test","Nice number",min = 1,max = 50,value = 30)
),
mainPanel(
textOutput("valueText")
)
)
))
# Define server to disable slider if value selected
server <- shinyServer(function(input, output) {
value <- reactive(input$test)
output$valueText <- renderText(paste(value()))
#How to diasble slider?
reactive(if(value()==35){
shinyjs::disable('test')
}
)
})
# Run the application
shinyApp(ui = ui, server = server)
答案 0 :(得分:1)
你必须在ui.R中调用useShinyjs()。
这是代码:
library(shiny)
library(shinyjs)
# Define UI for application that draws a histogram
ui <- shinyUI(
tagList(
useShinyjs(),
fluidPage(
sidebarLayout(
sidebarPanel(
sliderInput("test","Nice number",min = 1,max = 50,value = 30)
),
mainPanel(
textOutput("valueText")
)
)
)
)
)
# Define server to disable slider if value selected
server <- shinyServer(function(input, output) {
value <- reactive(input$test)
output$valueText <- renderText(paste(value()))
#How to diasble slider?
observeEvent(value(), {
if(value()==35){
shinyjs::disable('test')
}
})
})
# Run the application
shinyApp(ui = ui, server = server)