Dynamic checkboxGroupInput Based on User Input
In this example, the user can input a number between 1 and 5 and the app will generate that many checkboxes in the checkboxGroupInput.
R
library(shiny) ui <- fluidPage( sidebarLayout( sidebarPanel( numericInput("num_boxes", "Number of Boxes", 1, min = 1, max = 5) ), mainPanel( checkboxGroupInput("boxes", "Select Boxes") ) ) ) server <- function(input, output, session) { observe({ boxes <- 1:input$num_boxes updateCheckboxGroupInput(session, "boxes", label = NULL, choices = boxes, selected = NULL) }) } shinyApp(ui, server) |
Output:
Dynamic checkboxGroupInput based on user input
Create Dynamic checkboxGroupInput in Shiny package Using R
The Shiny is an R package that allows us to build interactive web applications with R Programming Language. One of the core components of a Shiny app is the ability to dynamically update the content of the app based on user input.
- One way to do this is by using the checkboxGroupInput.
- which allows users to select multiple options from a list of checkboxes.
- The checkboxGroupInput can be dynamically updated based on user input.
- The checkboxGroupInput is a UI element that allows the user to select multiple options from a list of choices.
- To create a dynamic checkboxGroupInput in Shiny.
- We can use the updateCheckboxGroupInput() function in the server code.
Syntax :
checkboxGroupInput(inputId, label, choices, selected = NULL, inline = FALSE)
where,
- inputId: the unique identifier for input control.
- label: The text to display above the input control.
- choices: A vector of options to display as checkboxes.
- selected: The default selected options.
- inline: Whether to display the checkboxes inline or on separate lines.
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