如何绘制使用闪亮上传的数据集? [英] How to plot uploaded dataset using shiny?

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问题描述

我是R-shiny应用程序的新手,我的应用程序非常简单。它有两个选项卡,第一,我上传一个文件,如csv,然后在第二个选项卡,我选择将被绘制的列,我的解决方案分散在几个例子每个不同于我的,我想上传的数据集可以看到,并且可以在所有功能中使用,而不仅仅是上传它。



我的服务器.R

 库(shiny)
shinyServer(函数(输入,输出){
输出$ contents< - renderTable({
inFile< - 输入$ file1

if(is.null(inFile))
return(NULL)
read.csv(inFile $ datapath,header = input $ header,sep = input $ sep,
quote =输入$ quote)

))
输出$ MyPlot< - renderPlot({
x< - contents()$ contents [,c (输入$ xcol,输入$ ycol)]
bins< - nrow(contents())
hist(x,breaks = bins,col ='darkgray',border ='white')
$)
))

ui.R

 库(闪亮)
库(数据集)
shinyU I(fluidPage(
titlePanel(Column Plot),
tabsetPanel(
tabPanel(上传文件,
titlePanel(上传文件),
sidebarLayout (
sidebarPanel(
fileInput('file1','选择CSV文件',
accept = c('text / csv',$ b $'text / comma-separated-values, text / plain',
'.csv'))

),
mainPanel(
tableOutput('contents')


),
tabPanel(First Type,
pageWithSidebar(
headerPanel('My First Plot'),
sidebarPanel(
selectInput(' xcol','X Variable',names(content)),
selectInput('ycol','Y Variable',names(content),
selected = names(content)[[2]])
),
mainPanel(
p lotOutput('MyPlot')









我已经试过了,但我刚刚开始这么做,请问我该怎么做?


<您可以创建一个被动数据集(例如 data ),其中您的应用程序将读取上传的文件并更新输入 - 在这种情况下,数据框的名称并将其传递给 render * 函数。

 库(闪亮)
库(数据集)

ui< - shinyUI(fluidPage(
titlePanel(Column Plot),
tabsetPanel(
tabPanel(上传文件,
titlePanel(上传文件),
sidebarLayout(
sidebarPanel(
fileInput('file1','选择CSV文件',
accept = c('text / csv',
' text / comma-separated-values,text / plain',
'.csv')),

#增加了从
#http:// shiny上传数据的界面。 rstudio.com/gallery/file-upload.html
tags $ br(),
checkboxInput('header','Header',TRUE),
radioButtons('sep','Separator ',
c(逗号=',',
Semicolon =';',
Tab ='\t'),
','),
radioButtons('quote','Quote',
c(None ='' ',
'双引号'='''',
'单引号'='),
''')

),
mainPanel(
tableOutput('contents')


),
tabPanel(First Type,
pageWithSidebar(
) headerPanel('我的第一个情节'),
sidebarPanel(

#空输入 - 它们会在数据上传后更新
selectInput('xcol','X变量',),
selectInput('ycol','Y Variable',,selected =)

),
mainPanel(
plotOutput('MyPlot')








服务器< - shinyServer(函数(输入,输出,会话){
#增加了会话,因为updateSelectInput需要它


data < - reactive({
req(input $ file1)##?req#要求输入可用

inFile< - input $ file1

#使用以下数据集进行测试:write.csv(mtcars,mtcars.csv)
#和write.csv(iris,iris.csv)
df< - read.csv(inFile $ datapath,header =输入$ header,sep =输入$ sep,$ b $ quote =输入$ quote)


#更新输入(你可以创建一个观察者与updateSel ...)
#你也可以限制你的选择。如果您只想选择数字
#变量,您可以设置choices = sapply(df,is.numeric)
#这取决于您稍后想要做什么。
$ b updateSelectInput(session,inputId ='xcol',label ='X Variable',
choices = names(df),selected = names(df))
updateSelectInput(session ,inputId ='ycol',label ='Y Variable',
choices = names(df),selected = names(df)[2])

return(df)
}}

输出$ contents< - renderTable({
data()
})

输出$ MyPlot< - renderPlot({
#为直方图:删除第二个变量(它也必须是数字):
#x < - data()[,c(input $ xcol,input $ ycol)]
#bins < - nrow(data())
#hist(x,breaks = bins,col ='darkgray',border ='white')

#正确的方法:
#x < - data()[,input $ xcol]
#bins < - nrow(data())
#hist(x,breaks = bins,col ='darkgray ',border ='white')


#I因为你有两个输入,我决定做一个scatterpl (x)

})
})$ b(b $< - data
$ b shinyApp(ui,server)


I'm new to R-shiny apps, My application is very simple. It has two tabs, in the first, I upload a file such as csv, then in the second tab, I choose the columns that will be plotted, My solution is scattered over several example each is not the same as mine, I want the uploaded dataset to be seen and can be used in all functions not just only when uploading it.

my server.R

library(shiny)
shinyServer(function(input, output) {
output$contents <- renderTable({
inFile <- input$file1

if (is.null(inFile))
  return(NULL)
read.csv(inFile$datapath, header=input$header, sep=input$sep, 
         quote=input$quote)

})
output$MyPlot <- renderPlot({
x    <- contents()$contents[, c(input$xcol, input$ycol)]
bins <- nrow(contents())
hist(x, breaks = bins, col = 'darkgray', border = 'white')
})
})

ui.R

library(shiny)
library(datasets)
shinyUI(fluidPage(
titlePanel("Column Plot"),
tabsetPanel(
tabPanel("Upload File",
         titlePanel("Uploading Files"),
         sidebarLayout(
           sidebarPanel(
             fileInput('file1', 'Choose CSV File',
                       accept=c('text/csv', 
                                'text/comma-separated-values,text/plain', 
                                '.csv'))

      ),
           mainPanel(
             tableOutput('contents')
           )
         )
),
tabPanel("First Type",
         pageWithSidebar(
           headerPanel('My First Plot'),
           sidebarPanel(
             selectInput('xcol', 'X Variable', names(content)),
             selectInput('ycol', 'Y Variable', names(content),
                         selected=names(content)[[2]])
           ),
           mainPanel(
             plotOutput('MyPlot')
           )
         )
)

)
)
)

I've tried to that, but I'm just starting that so, what should I do please?

解决方案

You can create a reactive dataset (for instance data) in which your app reads the uploaded file and updates inputs - in this case names of a data frame and pass it to the render* functions. I made some more detailed comments in the code.

library(shiny)
library(datasets)

ui <- shinyUI(fluidPage(
  titlePanel("Column Plot"),
  tabsetPanel(
    tabPanel("Upload File",
             titlePanel("Uploading Files"),
             sidebarLayout(
               sidebarPanel(
                 fileInput('file1', 'Choose CSV File',
                           accept=c('text/csv', 
                                    'text/comma-separated-values,text/plain', 
                                    '.csv')),

                 # added interface for uploading data from
                 # http://shiny.rstudio.com/gallery/file-upload.html
                 tags$br(),
                 checkboxInput('header', 'Header', TRUE),
                 radioButtons('sep', 'Separator',
                              c(Comma=',',
                                Semicolon=';',
                                Tab='\t'),
                              ','),
                 radioButtons('quote', 'Quote',
                              c(None='',
                                'Double Quote'='"',
                                'Single Quote'="'"),
                              '"')

               ),
               mainPanel(
                 tableOutput('contents')
               )
             )
    ),
    tabPanel("First Type",
             pageWithSidebar(
               headerPanel('My First Plot'),
               sidebarPanel(

                 # "Empty inputs" - they will be updated after the data is uploaded
                 selectInput('xcol', 'X Variable', ""),
                 selectInput('ycol', 'Y Variable', "", selected = "")

               ),
               mainPanel(
                 plotOutput('MyPlot')
               )
             )
    )

  )
)
)

server <- shinyServer(function(input, output, session) {
    # added "session" because updateSelectInput requires it


  data <- reactive({ 
    req(input$file1) ## ?req #  require that the input is available

    inFile <- input$file1 

    # tested with a following dataset: write.csv(mtcars, "mtcars.csv")
    # and                              write.csv(iris, "iris.csv")
    df <- read.csv(inFile$datapath, header = input$header, sep = input$sep,
             quote = input$quote)


    # Update inputs (you could create an observer with both updateSel...)
    # You can also constraint your choices. If you wanted select only numeric
    # variables you could set "choices = sapply(df, is.numeric)"
    # It depends on what do you want to do later on.

    updateSelectInput(session, inputId = 'xcol', label = 'X Variable',
                      choices = names(df), selected = names(df))
    updateSelectInput(session, inputId = 'ycol', label = 'Y Variable',
                      choices = names(df), selected = names(df)[2])

    return(df)
  })

  output$contents <- renderTable({
      data()
  })

  output$MyPlot <- renderPlot({
    # for a histogram: remove the second variable (it has to be numeric as well):
    # x    <- data()[, c(input$xcol, input$ycol)]
    # bins <- nrow(data())
    # hist(x, breaks = bins, col = 'darkgray', border = 'white')

    # Correct way:
    # x    <- data()[, input$xcol]
    # bins <- nrow(data())
    # hist(x, breaks = bins, col = 'darkgray', border = 'white')


    # I Since you have two inputs I decided to make a scatterplot
    x <- data()[, c(input$xcol, input$ycol)]
    plot(x)

  })
})

shinyApp(ui, server)

这篇关于如何绘制使用闪亮上传的数据集?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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