如何解决闪亮的应用程序，它上传数据文件并为每列创建一个复选框、文本输入和下拉列表
Here is a video which explains what I want。
如果选中该复选框，则应为每列显示一个下拉列表和两个文本输入。
如果它没有被选中，那么复选框和两个文本输入应该消失。
此 image 只有两个文本输入和第一列的下拉列表，但每个复选框应该有两个文本输入和下拉列表。
界面代码：
shinyUI(
navbarPage(title="Analysis",tabPanel(title="Input",sidebarLayout(
sidebarPanel(
fileInput("file","Upload the file"),checkBoxInput('file_has_headers',"Take Column Names from the first row of the file",value= TRUE),checkBoxInput('show_head_only',"display only first 6 rows. Uncheck this to see entire file",radioButtons(inputId = 'sep',label = 'Separator',choices = c(Comma=',',Semicolon=';',Tab='\t',Space=''),selected = ','),textAreaInput("domains",'Enter the comma separated list of dimensions,for example: verbal ability,numerical ability' ),width = 4
),mainPanel(
wellPanel(
DT::dataTableOutput("uploaded_table"
),# displays the uploaded table by using js dataTable from DT package
),width = 8
),position = 'left'
)
),#End of Input Tab panel
tabPanel(title="Verification",fluidRow(
column(2,"V",uIoUtput('choose_columns')
),column(2,"Key",textInput('anser_key',"",placeholder = 'e.g. A')
),column(4,"Dimension",uIoUtput("domain_dropdown",inline = FALSE)
),column(3,"Valid Options",textInput('valid_options',placeholder = 'e.g. A,B,C,D')
),) # End Fluid row
),#End of Verification Tab Panel
navbarMenu(title="Analayis",tabPanel(title="Item Analysis","content"
),#End of Item Analysis Tab Panel
tabPanel(title="Test Analysis","content"
) #End of Test Analysis Tab Panel
) #End of navbarMenu
) #End of navbarPage
) #end of shinyUI
服务器代码：
library(shiny)
library(DT)
options(shiny.maxRequestSize=300*1024^2)
shinyServer(function(input,output) {
#1: Get the uploaded file in the data variable
data <- reactive({
uploaded <- input$file
#if(is.null(file1)){return("No file is selected or selected file is not in the right format. Please check the documentation and upload correct file.")}
req(uploaded) #req retruns a silence rather than error and is better than using if()
if(input$show_head_only){
head(read.csv(file=uploaded$datapath,sep=input$sep,header = input$file_has_headers)) #head() returns only first 6 rows
} else {
read.csv(file=uploaded$datapath,header = input$file_has_headers)
}
})
#2:set the elemet for domain dropdown list.
output$domain_dropdown <- renderUI({
items <- strsplit(input$domains,')[[1]] #It creates a list and [[1]] retuns the list as c('','') which is needed for select input
selectInput(inputId = "domains",label = "",choices = items)
})
#3: set element to show the uploaded csv file as a table
output$uploaded_table<- DT::renderDataTable(
data(),# If a variable contains the output of reactive() function,it must be used as a function.
server=TRUE,#Important to keep this as true so that large datasets do not crash the browser
options = list(
scrollX = TRUE
),) # End of uploaded table output setting
#4: Set dynamic checkBoxes based on the number of columns in the data
output$choose_columns <- renderUI({
req(data())
colnames <- names(data())
checkBoxGroupInput("columns","Choose columns",choices = colnames,# selected = colnames
)
})
})
解决方法
也许您正在寻找这个。
ui <- shinyUI(
navbarPage(title="Analysis",tabPanel(title="Input",sidebarLayout(
sidebarPanel(
fileInput("file","Upload the file"),checkboxInput('file_has_headers',"Take Column Names from the first row of the file",value= TRUE),checkboxInput('show_head_only',"Display only first 6 rows. Uncheck this to see entire file",radioButtons(inputId = 'sep',label = 'Separator',choices = c(Comma=',',Semicolon=';',Tab='\t',Space=''),selected = ','),textAreaInput("domains",'Enter the comma seperated list of dimensions,for example: verbal ability,numerical ability' ),width = 4
),mainPanel(
wellPanel(
DT::dataTableOutput("uploaded_table"
),# Displays the uploaded table by using js dataTable from DT package
),width = 8
),position = 'left'
)
),#End of Input Tab panel
tabPanel(title="Verification",fillRow(flex = c(1,4),fillCol(uiOutput('choose_columns')),fillCol(fluidRow(column(8,uiOutput('kdv'))))
) ## end of fillRow
),#End of Verification Tab Panel
navbarMenu(title="Analayis",tabPanel(title="Item Analysis","content"
),#End of Item Analysis Tab Panel
tabPanel(title="Test Analysis","content"
) #End of Test Analysis Tab Panel
) #End of navbarMenu
) #End of navbarPage
) #end of shinyUI
library(shiny)
library(DT)
options(shiny.maxRequestSize=300*1024^2)
server <- shinyServer(function(input,output) {
#1: Get the uploaded file in the data variable
data <- reactive({
uploaded <- input$file
#if(is.null(file1)){return("No file is selected or selected file is not in the right format. Please check the documentation and upload correct file.")}
req(uploaded) #req retruns a silence rather than error and is better than using if()
if(input$show_head_only){
head(read.csv(file=uploaded$datapath,sep=input$sep,header = input$file_has_headers)) #head() returns only first 6 rows
} else {
read.csv(file=uploaded$datapath,header = input$file_has_headers)
}
})
#2:set the element for domain dropdown list.
output$domain_dropdown <- renderUI({
req(input$columns)
items <- strsplit(input$columns,') # [[1]] #It creates a list and [[1]] returns the list as c('','') which is needed for select input
selectInput(inputId = "domains",label = "",choices = items)
})
#3: set element to show the uploaded csv file as a table
output$uploaded_table<- DT::renderDataTable(
data(),# If a variable contains the output of reactive() function,it must be used as a function.
server=TRUE,#Important to keep this as true so that large datasets do not crash the browser
options = list(
scrollX = TRUE
),) # End of uploaded table output setting
#4: Set dynamic checkboxes based on the number of columns in the data
output$choose_columns <- renderUI({
req(data())
colnames <- names(data())
checkboxGroupInput("columns","Choose columns",choices = colnames,# selected = colnames
)
})
output$kdv <- renderUI({
n <- length(names(data()))
colnames <- names(data())
if (is.null(input$columns)){return(NULL)
}else{
tagList(
lapply(1:n,function(i){
lapply(input$columns,function(par){
if (colnames[i]==par){
div(
div(style="display: inline-block; vertical-align:top; width: 145px ;",textInput(paste0('answer_key',i),"",placeholder = 'e.g. A')),div(style="display: inline-block; vertical-align:top; width: 155px ;",selectInput(paste0('sel_var',choices=data()[[par]])),div(style="display: inline-block; vertical-align:top; width: 145px ;",textInput(paste0('valid_options',placeholder = 'e.g. A,B,C,D'))
)
}
})
})
)
}
})
})
shinyApp(ui,server)
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