[英]How can I display a dataframe in a Shiny app as a grid, and not a table?
[英]Append to end of dataframe and display as table in Shiny app
我正在尝试创建一个非常简单的应用程序,用户可以在其中输入文本字段和数字,将其附加到 dataframe,然后将 dataframe 显示为表格。 我已经完成了 99%,但唯一的问题是新条目正在覆盖旧条目,因此您只能在数据框中获得一行,在显示的表格中获得一行。
这是一个可重现的示例:
library(shiny)
library(DT)
shinyApp(
ui = navbarPage("Making a dataframe and displaying it",
tabPanel("Input",
mainPanel(
textInput("text", "Text input", ""),
numericInput("number", "Numeric input", min=1, value = 1),
actionButton("submit", "Submit")
)
),
tabPanel("The list",
DT::dataTableOutput("thelist")
)
),
server = function(input, output) {
initial <- data.frame("text" = character(), "number" = numeric())
thelist <- eventReactive(input$submit,{rbind(initial,
data.frame("text" = input$text, "number" = input$number))
})
output$thelist = renderDataTable(thelist())
}
)
谢谢!
您可以将 dataframe 放入reactiveValues
并使用observeEvent
在点击时添加新行。
library(shiny)
library(DT)
shinyApp(
ui = navbarPage("Making a dataframe and displaying it",
tabPanel("Input",
mainPanel(
textInput("text", "Text input", ""),
numericInput("number", "Numeric input", min=1, value = 1),
actionButton("submit", "Submit")
)
),
tabPanel("The list",
DT::dataTableOutput("thelist")
)
),
server = function(input, output) {
rv <- reactiveValues(data = data.frame(text = character(), number = numeric()))
observeEvent(input$submit,{
rv$data <- rbind(rv$data, data.frame(text = input$text, number = input$number))
})
output$thelist = renderDataTable({
rv$data
})
}
)
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