I'm experimenting a Shiny App to show dynamic contexts, but I cannot get renderDataTable working into a renderUi component.
Below two simple replicable tests: the first one is not working, the second one without renderUi works fine, of course.
What is the conceptually difference between this two, and why the first one cannot work in Shiny?
This one not works: note that the uiOutput myTable, contains two reactive component, a selectInput and a renderDataTable, but only the selectInput is rendered.
library(shiny)
runApp(list(
ui = fluidPage(
fluidRow(h2("where is the table?")),
uiOutput('myTable')
),
server = function(input, output) {
output$myTable <- renderUI({
fluidPage(
fluidRow(selectInput("test", "test", c(1,2,3))),
fluidRow(renderDataTable(iris))
)
})
}
))
This is fine, both selectInput and renderDataTable are rendered:
library(shiny)
runApp(list(
ui = fluidPage(
fluidRow(h2("where is the table?")),
fluidRow(selectInput("test", "test", c(1,2,3))),
fluidRow(dataTableOutput('myTable'))
),
server = function(input, output) {
output$myTable = renderDataTable(iris)
}
))
How to get the first scenario working?
Thanks.
EDITING after Yihui comment (thanks Yihui):
In renderUi has to be used some ui function, and not some render function:
changed the sample code in the correct way, the result does not change: still no data is shown.
library(shiny)
runApp(list(
ui = basicPage(
uiOutput('myTable')
),
server = function(input, output) {
output$myTable <- renderUI({dataTableOutput(iris)
})
}
))
EDIT n.2
Just solved, got it working so:
library(shiny)
runApp(list(
ui = fluidPage(
mainPanel(
uiOutput('myTable')
)
),
server = function(input, output) {
output$myTable <- renderUI({
output$aa <- renderDataTable(iris)
dataTableOutput("aa")
})
}
))
I have to save the renderTableOutput in a output variable first, and then feeding it to dataTableOutput.
Thanks for pointing me to: here
It would be clearer if you split the part of datatable generation and ui generation :
library(shiny)
runApp(list(
ui = fluidPage(
mainPanel(
uiOutput('myTable')
)
),
server = function(input, output) {
output$aa <- renderDataTable({iris})
output$myTable <- renderUI({
dataTableOutput("aa")
})
}
))
Related
I am using below code and try to do below action.
Click on action button to go to next table. How can I do this?
library(shiny)
library(shinydashboard)
library(ggplot2)
ui <- fluidPage(
fluidRow(box(
actionButton("btn1", "Go to Next Table"),
tableOutput("tbl1")
)),
fluidRow(box(
tableOutput("tbl2")
))
)
server <- function(input, output, session) {
output$tbl1 <- renderTable(mtcars)
output$tbl2 <- renderTable(mpg)
}
shinyApp(ui, server)
Here's one solution:
library(shiny)
library(shinydashboard)
library(ggplot2)
ui <- fluidPage(
fluidRow(box(
actionButton("btn1", "Go to Next Table",
onclick = "location.href='#table2';"),
tableOutput("tbl1")
)),
fluidRow(id = "table2", box(
tableOutput("tbl2")
))
)
server <- function(input, output, session) {
output$tbl1 <- renderTable(mtcars)
output$tbl2 <- renderTable(mpg)
}
shinyApp(ui, server)
I've added a unique ID to the location in the UI - here the 2nd fluidRow, then added an onclick javascript function to the actionButton also in the UI. No server function means all the work is done by the user's browser which is handy sometimes.
You can add infinite complexity to the Javascript here to customise it to fit your needs.
I want to generate a boxPlus around my DT-Output. Now when I start my APP, the frame of the box is already there. How do I manage that the box is only displayed when the tableoutput is finished? As input I use a text input.
In my UI I use for the Input:
textInput("name", "Insert Number:")
the final box I create with:
uiOutput("box")
On Serverside I do:
output$name <- renderText(input$name)
New_input <- reactive({
list(input$name)
})
and the box I create like this:
output$box <- renderUI({
boxPlus(
div(style = 'overflow-x: scroll;'), dataTableOutput("table")
)
})
I tried it with: Similar Problem but I can not resolve the problem. Without the box everything works fine.
Never use reactive expressions inside a renderText function.
You have to wrap tagList around your two elements to return a SINGLE element (a list in your case).
Here is a reproduceable example.
library(shiny)
library(shinydashboardPlus)
library(dplyr)
# Define UI for application that draws a histogram
ui <- fluidPage(
# Application title
titlePanel("Hide box"),
# Sidebar with a slider input for number of bins
sidebarLayout(
sidebarPanel(
textInput("name", "Insert Number to filter cyl:")
),
mainPanel(
uiOutput("box")
)
)
)
server <- function(input, output) {
resultdf <- reactive({
mtcars %>%
filter(cyl > input$name)
})
output$box <- renderUI({
output$table <- renderDataTable({
resultdf()
})
if(input$name == "") {
return(NULL)
} else {
return(
tagList(
boxPlus(
div(style = 'overflow-x: scroll;'), dataTableOutput("table")
)
)
)
}
})
}
# Run the application
shinyApp(ui = ui, server = server)
I am trying to create a shiny app using rhandsontable. I am using the code below:
library(shiny)
library(rhandsontable)
library(ggplot2)
ui = fluidPage(
rHandsontableOutput ('table'))
server = function(input, output, session) {
output$table < renderRHandsontable(mpg)}
shinyApp(ui, server)
When i run the code i get error "rendering objects from shinyoutput not allowed"
Any idea why its happening ?
This should do:
library(shiny)
library(rhandsontable)
library(ggplot2)
ui <- fluidPage(
mainPanel(
rHandsontableOutput('table')
)
)
server = function(input, output, session) {
output$table <- renderRHandsontable({
rhandsontable(head(mpg))
})
}
shinyApp(ui, server)
The given R shiny script creates a simple data table as in the snapshot with an actionButton in the center. I want to place the button a little below it's current position such that it is in perfect horizontal inline position to the search bar. Thanks and please help.
library(DT)
library(shiny)
library(shinyBS)
library(rpivotTable)
library(bupaR)
ui <- basicPage(
h2("The mtcars data"),
column(5,offset = 5,actionButton("CR1_S1", "Button")),
dataTableOutput("mytable1")
)
server <- function(input, output) {
output$mytable1 <- DT::renderDataTable({
DT::datatable(iris)
})
}
shinyApp(ui, server)
You can put the button inside the datatable in this way:
ui <- basicPage(
h2("The mtcars data"),
actionButton("CR1_S1", "Button"),
DTOutput("mytable1")
)
server <- function(input, output) {
output$mytable1 <- renderDT({
datatable(iris, callback = JS("$('div.button').append($('#CR1_S1'));"),
options = list(
dom = '<"row"<"col-sm-4"l><"col-sm-4 text-center"<"button">><"col-sm-4"f>>tip'
))
})
}
shinyApp(ui, server)
I am trying to use conditionalPanel to display message when a file is being loaded. However, the panel is not disappearing once the condition is TRUE. I have created a reproducible code below:
server.R
library(shiny)
print("Loading start")
print(paste("1->",exists('FGram')))
FGram <- readRDS("data/UGram.rds")
print(paste("2->",exists('FGram')))
print("Loading end")
shinyServer( function(input, output, session) {
})
ui.R
library(shiny)
shinyUI( fluidPage(
sidebarLayout(
sidebarPanel(
h4("Side Panel")
)
),
mainPanel(
h4("Main Panel"),
br(),
textOutput("First Line of text.."),
br(),
conditionalPanel(condition = "exists('FGram')", HTML("PLEASE WAIT!! <br>App is loading, may take a while....")),
br(),
h4("Last Line of text..")
)
)
)
Conditions supplied to conditionalPanel are executed in the javascript environment, not the R environment, and therefore cannot reference or inspect variables or functions in the R environment. A solution to your situation would be to use uiOutput, as in the example below.
myGlobalVar <- 1
server <- function(input, output) {
output$condPanel <- renderUI({
if (exists('myGlobalVar'))
HTML("PLEASE WAIT!! <br>App is loading, may take a while....")
})
}
ui <- fluidPage({
uiOutput('condPanel')
})
shinyApp(ui=ui, server=server)