R发光仪表板由于某种原因未显示图形。不会让我向一个ggplot渲染器添加2个反应式表达式

时间:2019-07-04 16:04:26

标签: r shiny shinydashboard shiny-server

尽管我的图表无法正常工作,但我正在尝试获取Shiny仪表板。

我有一个data.frame,它由日期格式的Date列和4个数字列类型组成,这些类型为ISA, NonISA, FixedRateInterest and VariableRateInterest,并用0填充了N / A值。

我有一个带有日期范围滑块的复选框,我可以渲染图形,但是当我尝试在DateRangeslider中添加它时,它将不起作用并抛出以下错误:

Unknown input:data.frame

这是我创建仪表板的代码。谁能帮我了解为什么它不起作用?我知道这与ggplot行有关,但不确定是什么。

谢谢

isa <- read.csv("isa.csv")
isa$Date <- paste0(isa$Date, "01")
isa$Date <- as.character(isa$Date)
isa$Date <- as.Date(isa$Date, format = "%Y%m%d")
date <- isa$Date


# Define UI ----
ui <- fluidPage(
  titlePanel("Customer"),
  sidebarLayout(
  sidebarPanel(
    br(),
    br(),
    br(),
    br(),
br(),
br(),
br(),
br(),
br(),
br(),
br(),
br(),
br(),
br(),
br(),
br(),
br(),
img(src = "Logo.jpg", height = 100, width = 150)),
  fluidRow(
      h1("Choose Dataset"),
    br(),
  br(),
  column(1,
         checkboxGroupInput(inputId = "product",
                     h3("Product"),
                     choices = c('ISA',
                                    "Non-ISA",
                                    "Fixed",
                                    "Variable"),
                     selected = 1)),
  br(),
  br(),
  br(),
  br(),
  br(),
  br(),
  br(),
  br(),
  br(),
  br(),
  br(),

  column(2,
         dateRangeInput(inputId = "dates", h3("Date Range"),
                        start = min(isa$Date),
                        end =  max(isa$Date),
                        min = min(isa$Date),
                        max = max(isa$Date),
                        separator = "-", format = "yyyy/mm/dd")

  ))),
  br(),
  br(),
  br(),



mainPanel(
  plotOutput("barplot")
   )
 )
)
# Define server logic ----
server <- function(input, output) {




  dataInput <- reactive({

switch(input$product,
       "ISA" = ISA,
       "Non-ISA" = isa$NonISA,
       "Fixed" = isa$FixedRateInterest,
       "Variable" = isa$VariableRateInterest)

似乎在这里失败了

      })
 dateInputx <- reactive({
    isa[isa$Date >= input$dates[1] &  isa$Date <= input$dates[2],]
   })


  output$barplot <- renderPlot({

并且无法识别ggplot上的x轴

ggplot(data = dataInput(), aes_string(x= dateInputx(), y = dataInput())) +
         geom_line(stat ="identity")
  })

}


# Run the app ----
shinyApp(ui = ui, server = server)

1 个答案:

答案 0 :(得分:1)

您在data中的ggplot参数应该是数据框,而不是列。然后,将aes_string()与相应的列名一起使用。我尝试在下面制作一个可复制的示例:

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

ui <- fluidPage(
  sidebarLayout(
    sidebarPanel(
      selectInput('ycol','Y axis',choices = c('City Mileage','Highway Mileage')) # 
    ),
    mainPanel(
      plotOutput('plot')
    )
  )
)

server <- function(input,output){
  data(mpg)  # Replace mpg with your dataframe of choice(isa in your case)

  dataInput <- reactive({  # Required y column name as in dataframe
    switch(input$ycol,
           "City Mileage" = 'cty',
           "Highway Mileage" = 'hwy')

  })


  output$plot <- renderPlot({
                         # Use aes_string for column names stored in strings
    p <- ggplot(data=mpg,aes_string(x='displ',y=dataInput()))+
      geom_line()

    p
  })
}

shinyApp(ui,server)