【发布时间】：2019-06-18 09:14:00
【问题描述】：
我正在 mtcars 数据上构建一个 shinyApp。我在计算 disp 变量 的值时遇到问题。 在carb button中选择all时，disp显示0 count。如果在 carb 中选择了 all 以外的值，则 disp 将给出其值的准确计数。 有人可以看看我的代码。我将不胜感激。
library(shiny)
library(DT)
library(dplyr)
library(shinythemes)
library(htmlwidgets)
library(shinyWidgets)
library(shinydashboard)
data_table<-mtcars
#ui
ui = fluidPage(
sidebarLayout(
sidebarPanel (
uiOutput("vs_selector"),
uiOutput("carb_selector"),
uiOutput("disp_selector"),
uiOutput("cyl_selector"),
valueBoxOutput("count_disp"),
valueBoxOutput("count_cyl")),
mainPanel(
DT::dataTableOutput('mytable')
)
))
#server
server = function(input, output, session) {
output$vs_selector <- renderUI({
selectInput(inputId = "vs",
label = "vs:", multiple = TRUE,
choices = c( unique(data_table$vs)),
selected = c(0,1))
})
output$carb_selector <- renderUI({
req(input$vs)
available0 <- data_table[c(data_table$vs %in% input$vs ), "carb"]
selectInput(
inputId = "carb",
label = "carb:",
multiple = TRUE,
choices = c('All',as.character(unique(available0))),
selected = 'All')
})
output$disp_selector <- renderUI({
req(input$vs, input$carb)
available <- data_table[["disp"]][data_table$vs %in% input$vs]
if(! "All" %in% input$carb){
available <- available[data_table$carb %in% input$carb]
}
selectInput(
inputId = "disp",
label = "disp:",
multiple = TRUE,
choices = c('All',as.character(unique(available))),
selected = c(160,108, 258, 360))
})
output$cyl_selector <- renderUI({
req(input$vs, input$carb, input$disp)
available <- data_table[["cyl"]][data_table$vs %in% input$vs]
if(! "All" %in% input$disp){
available <- available[data_table$carb %in% input$carb &
data_table$disp %in% input$disp]
}
selectInput(
inputId = "cyl",
label = "cyl:",
multiple = TRUE,
choices = c('All',as.character(unique(available))),
selected = 'All')
})
output$count_disp <- renderValueBox({
if("All" %in% input$carb) {
available <- unique(data_table[['disp']][data_table$vs %in% input$vs]
)
} else{
available <- unique(data_table[['disp']][data_table$carb %in%
input$carb &
data_table$vs %in% input$vs ] )
}
valueBox(
value = length(available) ,
subtitle = sprintf("Number of disp values" ))
})
output$count_cyl <- renderValueBox({
if("All" %in% input$disp) {
available <- unique(data_table[['cyl']][data_table$vs %in% input$vs] )
} else{
available <- unique(data_table[['cyl']][data_table$carb %in%
input$carb &
data_table$vs %in% input$vs
&
data_table$disp %in%
input$disp ] )
}
valueBox(
value = length(available) ,
subtitle = sprintf("Number of cyl values" ))
})
thedata <- reactive({
req(input$disp, input$vs, input$carb, input$cyl)
data_table<-data_table[data_table$vs %in% input$vs,]
if(! "All" %in% input$carb){
data_table<-data_table[data_table$carb %in% input$carb,]
}
if(! "All" %in% input$disp){
data_table<-data_table[data_table$disp %in% input$disp,]
}
if(! "All" %in% input$cyl){
data_table<-data_table[data_table$cyl %in% input$cyl,]
}
data_table
})
output$mytable = DT::renderDataTable({
DT::datatable( {
thedata() # Call reactive thedata()
})
})
}
shinyApp(ui = ui, server = server)
【问题讨论】：
标签： r input shiny radio-button dt