用于样本大小的power.prop.test函数的闪亮渲染输出

时间:2016-06-17 01:27:16

标签: r statistics shiny sample-size

我很擅长闪亮,而且我知道问题相当简单,但是尽管进行了大量的研究,我似乎无法获得闪亮的效果来测试比例的输出。我正在尝试创建一个脚本,用户输入所有参数(p1,p2,sig.level,power),并给出样本大小n。我尝试了很多不同的方法,但我通常最终没有输出,或者错误"' n'' p1',' p2& #39;,' power',' sig.level'必须为NULL"。感谢任何帮助,谢谢!

到目前为止我的代码:

    ui<-shinyUI(fluidPage(
    headerPanel("Power Calculator"),
    fluidRow(
    column(12,
       wellPanel(
         helpText("This calculator can help you understand the power of 
                  your experimental design to detect treatment effects. You     
        can choose 
                  between a standard design in which individuals are randomly   
       assigned to treatment or control 
                  and a clustered design, in which groups of individuals are assigned to treatment 
                  and control together."),
         column(4,
                wellPanel(

         numericInput('p1a','prop1', value = 0.12, min = 0.01, max = 0.99),
         numericInput('p2a', 'prop2', value = 0.14, min = 0.01, max = 0.99),
         numericInput('sig.levela','significance level' , value = 0.95, min = 0.9, max = 0.99),
         numericInput('powera', 'power level', value = 0.8, min = 0.75, max = 0.99)
                ),
         column(8,
                wellPanel(
                  htmlOutput("nrequired")

                )
         )
         )
         )
         )
         )
         )
         )
         )

         server<-shinyServer(
        function(input, output) {



        sample.size<-reactive({
  p1<-input$p1a
  p2<-input$p2a
  sig.level<-input$sig.level$a
  power<-input$power.levela

})


output$nrequired <- renderPrint({
power.prop.test(sample.size)
print(sample.size)
})

}
)

shinyApp(ui=ui,server=server)

1 个答案:

答案 0 :(得分:1)

错误消息来自power.prop.test,这是因为将反应式sample.size作为参数传递给它。

请尝试按如下方式修改服务器功能:

server <- shinyServer(function(input, output) {
  output$nrequired <- renderPrint({
    power.prop.test(p1 = input$p1a, p2 = input$p2a, 
                    sig.level = input$sig.levela, power = input$powera)
  })
})

顺便说一句:我想知道你选择的sig.level参数是0.95而power.prop.test使用的默认值是0.05。