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我正在构建一个闪亮的应用程序,并希望反应控制哪些列显示在热图中。我希望首先显示所有列,然后通过从checkboxGroupInput.

当我运行代码时,热图没有出现。我尝试通过查看数据框进行故障排除,df_select但它只有“mpg”列,而它最初应该包含所有这些(mpg:carb)。包含View(df_select)会引发错误,因此在下面将其注释掉。

任何帮助将不胜感激。

应用程序.R

library(ggplot2)
library(d3heatmap)
library(dplyr)
library(shiny)

## ui.R
ui <- fluidPage(
  sidebarPanel(
    h5(strong("Dendrogram:")),
    checkboxInput("cluster_row", "Cluster Rows", value=FALSE),
    checkboxInput("cluster_col", "Cluster Columns", value=FALSE),
    checkboxGroupInput("col_list", "Select col to include:", names(mtcars), selected=names(mtcars)),
    h5(strong("Sort:")),
    checkboxInput("check_sort", "Sort (Yes/No)", value=FALSE),
    selectInput("sort", "Sort:", names(mtcars), selected="mpg")
  ),
  mainPanel(
    h4("Heatmap"),
    d3heatmapOutput("heatmap", width = "100%", height="600px")
  )
)

## server.R
server <- function(input, output) {

  df_select <- reactive({
    all <- names(mtcars)
    print(all) #debug
    selection <- input$col_list
    print(selection) #debug
    if("All" %in% input$col_list || length(input$col_list) == 0){
      selection <- all
    }else{
      selection <- input$col_list
    }
    df_select <- select_(mtcars, selection)
    #View(df_select) #debug
  })

  df_sort <- reactive({
    df_sort <- if(input$check_sort==FALSE) df_select() else arrange_(df_select(), input$sort)
  })

  output$heatmap <- renderD3heatmap({
    d3heatmap(df_sort(),
      colors = "Blues",
      if (input$cluster_row) RowV = TRUE else FALSE,
      if (input$cluster_col) ColV = TRUE else FALSE,
      yaxis_font_size = "7px"
    ) 
  })
}

shinyApp(ui = ui, server = server)
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1 回答 1

1

这是一个标准的评估问题。使用select_(mtcars, .dots=selection)(第 38 行)。

于 2016-01-25T09:25:39.710 回答