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表格为 output 基于 R shiny 中的用户输入

[英]Table as output based on user input in R shiny

我想构建一个 R Shiny 应用程序,该应用程序创建一个表格,显示来自用户的输入值并将两个数字输入变量的总和相加。

我已经定义了以下输入

# Define UI for application that returns table based on input values
ui <- fluidPage(

    # Application title
    titlePanel("Jack & Jones battle over the Castle!"),

    # Input
    dateInput('date', "Choose today's date:", value = NULL, min = NULL, max = NULL,
              format = "yyyy-mm-dd", startview = "month", weekstart = 0,
              language = "en", width = NULL),
    numericInput("Score Jack", label = "Submit Score Jack", value = 0, min = 0, max = 300, step = 1, width = '10%'),
    numericInput("Score Jones", label = "Submit Score Jones", value = 0, min = 0, max = 300, step = 1, width = '10%'),
    submitButton("Submit Scores", icon("Submit") , width = NULL)
)

作为 output,我想返回一个表,其中每个输入都有一个新行,例如三列(日期、得分 Jack、得分 Jones)和表格末尾的一行,以在“提交”时对两个得分列求和' 按钮被使用。 我尝试使用 renderTable function,但到目前为止没有产生任何结果。 在搜索类似问题时,我找到了使用 DT package 的解决方法。 然而,它似乎已经不存在了。

我是 Shiny 的新手,所以会很感激任何输入。

在下面找到一个小的工作示例。 您要呈现的数据帧存储在reactiveValues中(根据Add values to a reactive table in shiny )。 一旦通过observeEvent(...)行单击按钮(我变成了一个actionButton并命名为“submitButton”),就会添加一行。

library(shiny)

# Define UI for application that returns table based on input values
ui <- fluidPage(

    # Application title
    titlePanel("Jack & Jones battle over the Castle!"),

    # Input
    dateInput('date', "Choose today's date:", value = NULL, min = NULL, max = NULL,
              format = "yyyy-mm-dd", startview = "month", weekstart = 0,
              language = "en", width = NULL),
    numericInput("scoreJack", label = "Submit Score Jack", value = 0, min = 0, max = 300, step = 1, width = '10%'),
    numericInput("scoreJones", label = "Submit Score Jones", value = 0, min = 0, max = 300, step = 1, width = '10%'),
    actionButton("submitButton", "Submit Scores", icon("Submit") , width = NULL),

    # Output
    tableOutput("table")
)

# Define server logic required to render the table
server <- function(input, output) {
    values <- reactiveValues()
    values$df <- data.frame(data = character(), jack = character(), jones = character())

    observeEvent(input$submitButton, {
        new_row <- data.frame(data = strftime(input$date, "%Y-%m-%d"), jack = input$scoreJack, jones = input$scoreJones)
        values$df <- rbind(values$df, new_row)
    })

    output$table <- renderTable(values$df)
}

# Run the application 
shinyApp(ui = ui, server = server)

这个应用程序添加了一个总分列,它还会自动按日期对数据进行排序,以防万一用户没有按时间顺序添加日期。

关于我对总分行的评论,我将总分行的行名设置为“总分”,这会将总分放在最后一行,而不是像 rest 那样的行号. 总分显示数据框中最近日期的日期,而不是最后一次用户输入的日期。

library(shiny)

ui <- fluidPage(

  # Application title
  titlePanel("Jack & Jones battle over the Castle!"),

  # Input
  dateInput('date', "Choose today's date:", value = NULL, min = NULL, max = NULL,
            format = "yyyy-mm-dd", startview = "month", weekstart = 0,
            language = "en", width = NULL),
  numericInput("Score Jack", label = "Submit Score Jack", value = 0, min = 0, max = 300, step = 1, width = '10%'),
  numericInput("Score Jones", label = "Submit Score Jones", value = 0, min = 0, max = 300, step = 1, width = '10%'),
  actionButton("submit", "Submit Scores", icon("Submit") , width = NULL, style="color: #fff; background-color: #337ab7; border-color: #2e6da4"), 
  DT::DTOutput("score_table")
)

table_data <- data.frame(Date = as.Date(as.character()), `Score Jack` = as.numeric(), `Score Jones` = as.numeric(), check.names = FALSE)

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

  tableValues <- reactiveValues(df = data.frame(Date = as.Date(as.character()), `Score Jack` = as.numeric(), `Score Jones` = as.numeric(), check.names = FALSE))


  observeEvent(input$submit, {

    temp <- tableValues$m

    newRow <- data.frame(Date = input$date, `Score Jack` = input$`Score Jack`, `Score Jones` = input$`Score Jones`, check.names = FALSE)


    if(!is.null(temp)) {

      if(isolate(input$date) < temp[nrow(temp), 1]) {
        temp <- rbind(temp, newRow)
        temp <- dplyr::arrange(temp, Date)
      } else {
        temp <- rbind(temp, newRow)
      }
    } else {
      temp <- rbind(temp, newRow)
    }

    tableValues$m <- temp

  })


  output$score_table <- DT::renderDataTable({

    if(!is.null(tableValues$m)){

      table_data <- tableValues$m

      totalScore <- data.frame(Date = table_data[nrow(table_data),1], `Score Jack` =  sum(table_data$`Score Jack`), `Score Jones` = sum(table_data$`Score Jones`), check.names = FALSE)

      table_data <- rbind(table_data, totalScore)

      if(nrow(table_data > 2)){
        table_data <- dplyr::arrange(table_data, Date)
      }
    }
    rownames(table_data)[nrow(table_data)] <- "Score Total"
    table_data

  })

  observe({print(colnames(tableValues$m))})
  observe({print(!is.null(tableValues$m))})

}

shinyApp(ui, server)

在此处输入图像描述

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