Select/Deselect All Button for shiny variable selection

Question

I have this statement that lets me get basic descriptive statistics about my variables:

checkboxGroupInput(\'show_vars\', \'Columns in diamonds to show:\',
              


        

Answer 1

I added a global.R for loading packages and data - not always necessary but it's generally cleaner. There might be different ways to do what I did below, but I tend to use conditional panels in situations like this.

ui.R

library(shiny)

shinyUI(fluidPage(
  title = 'Examples of DataTables',
  sidebarLayout(
    sidebarPanel(

      radioButtons(
        inputId="radio",
        label="Variable Selection Type:",
        choices=list(
          "All",
          "Manual Select"
        ),
        selected="All"),

      conditionalPanel(
        condition = "input.radio != 'All'",
        checkboxGroupInput(
          'show_vars', 
          'Columns in diamonds to show:',
          choices=names(hw), 
          selected = "carat"
        )
      )

    ),
    mainPanel(
      verbatimTextOutput("summary"), 
      tabsetPanel(
        id = 'dataset',
        tabPanel('hw', dataTableOutput('mytable1'))
      )
    )
  )
))

server.R

library(shiny)
library(ggplot2)
##
shinyServer(function(input, output) {

  Data <- reactive({

    if(input$radio == "All"){
      hw
    } else {
      hw[,input$show_vars,drop=FALSE]
    }

  })

  output$summary <- renderPrint({
    ## dataset <- hw[, input$show_vars, drop = FALSE]
    dataset <- Data()
    summary(dataset)
  })

  # a large table, reative to input$show_vars
  output$mytable1 <- renderDataTable({
    Data()
    ## hw[, input$show_vars, drop = FALSE]
  })
})

global.R

library(shiny)
library(ggplot2)
data(diamonds)
hw <- diamonds