To generate buttons dynamically in Shiny or flexdashboard, you can use the renderUI
and uiOutput
functions. Here is an example:
library(shiny)
ui <- fluidPage(
# Define UI elements
sidebarLayout(
sidebarPanel(
# Define a numeric input for the number of buttons
numericInput("num_buttons", "Number of buttons", 1, min = 1, max = 10)
),
mainPanel(
# Use uiOutput to dynamically generate buttons
uiOutput("dynamic_buttons")
)
)
)
server <- function(input, output) {
# Create a renderUI function to generate buttons dynamically
output$dynamic_buttons <- renderUI({
# Use a for loop to create the desired number of buttons
button_list <- list()
for (i in 1:input$num_buttons) {
button_list[[i]] <- actionButton(paste0("button_", i), paste0("Button ", i))
}
do.call(tagList, button_list)
})
}
shinyApp(ui, server)
In this example, the user can specify the number of buttons they want to generate using a numeric input. The renderUI
function creates a list of actionButton
elements using a for loop and the input$num_buttons
variable. The do.call
and tagList
functions are used to combine the list of buttons into a single UI element that can be displayed using the uiOutput
function.
You can customize the appearance and behavior of the generated buttons using the many options available in the actionButton
function. For example, you can add icons, change the button color or size, or add a callback function to execute when the button is clicked.
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Asked: 2021-05-24 11:00:00 +0000
Seen: 7 times
Last updated: May 18 '21
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