在R
' shiny
我想创建一个应用程序,其中包含一个函数,用于对用户给出的值进行操作并返回结果(输入数据)。我重写了网上发现的一些例子,并提出了:
library(shiny)
server <- shinyServer(function(input, output, session) {
values <- reactiveValues()
values$df <- data.frame(N = numeric(0), A = numeric(0), C = numeric(0))
newEntry <- observe({
if(input$update > 0) {
gr <- 10 + input$n
newLine <- isolate(c(input$n, input$nr1, gr))
isolate(values$df[nrow(values$df) + 1,] <- c(input$n, input$nr1, gr))
}
})
output$table1 <- renderTable({values$df})
})
ui <- shinyUI(fluidPage(
titlePanel("submitButton example"),
fluidRow(
column(3, wellPanel(
sliderInput("nr1", "Give a number: ", min = 0, max = 100, value = 0, step = 2),
sliderInput("n", "N:", min = 10, max = 1000, value = 200,
step = 10),
actionButton("update", "Update Table")
)),
column(6,
tableOutput("table1")
)
)
))
shinyApp(ui, server)
这几乎是我想要的,除了在第一次点击Update Table
按钮后,应用程序更新表值而不等待下一次点击。如何应对?
答案 0 :(得分:2)
这应该有效
rm(list = ls())
library(shiny)
server <- shinyServer(function(input, output, session) {
values <- reactiveValues()
values$df <- data.frame(N = numeric(0), A = numeric(0), C = numeric(0))
newEntry <- observeEvent(input$update,{
gr <- 10 + input$n
values$df[nrow(values$df) + 1,] <- c(input$n, input$nr1, gr)
})
output$table1 <- renderTable({values$df})
})
ui <- shinyUI(fluidPage(
titlePanel("submitButton example"),
fluidRow(
column(3, wellPanel(
sliderInput("nr1", "Give a number: ", min = 0, max = 100, value = 0, step = 2),
sliderInput("n", "N:", min = 10, max = 1000, value = 200, step = 10),
actionButton("update", "Update Table"))),
column(6, tableOutput("table1"))
)
))
shinyApp(ui, server)