我想提供依赖于上传文件(fileInput)的inputselect“选项”。在下面的示例中,我希望as.list(mydata[1, 1:5])
作为inputselect选项的值。稍后,子集化值将是动态的,不会在此处显示。
我尝试了论坛中建议的几种方法(反应,观察,反应值及其组合),但没有取得多大成功。
我的脚本部分运行,但是我需要页面刷新以获取上传的“选项”并重新加载文件。
server.R
shinyServer(function(input, output, session) {
output$contents <- renderDataTable({
inFile <<- input$SoftRecom
if (is.null(inFile))
return(NULL)
filedatapath <<- reactive({inFile$datapath})
mydata <<- read.csv(filedatapath(), header = TRUE, sep = ',')
mydata
})
mychoices <<- reactive({
mydata
print(mydata)
})
output$vg <- renderUI({
selectInput("vg", label = p("goal", style = "color:#FFA500"),
mychoices()[1,1:5], selected = 1)
})
output$vp <- renderUI({
selectInput("procedure", label = p("procedure", style = "color:#FFA500"),
choices = c("proecudures"), selected = 1)
})
output$vm <- renderUI({
selectInput("procedure", label = p("procedure", style = "color:#FFA500"),
choices = c("ChIP-seq"), selected = 1)
})
})
ui.R
shinyUI(fluidPage(theme = "bootstrap.css",
titlePanel("simple software recommendation sytem"),
sidebarLayout(
sidebarPanel(
fileInput('SoftRecom', 'choose dataset'),
uiOutput("vg"), # variable goal
uiOutput("vp"), # variable procedure
uiOutput("vm") # variable method
),
mainPanel(
dataTableOutput('contents')
)
)
))
我在论坛中看到了许多与我的问题非常接近(甚至匹配)的例子和答案。很抱歉这么钝。如果有人能指出我的问题,我会非常感激。
杰
答案 0 :(得分:0)
最终我自己找到了解决方案。不要对我的问题和答案中的不同服务器代码感到困惑。看看
之间的关系UI.R
我必须插入:uiOutput(“pipelinestep”)见第8行
shinyUI(fluidPage(theme = "bootstrap.css",
titlePanel( h2("simple software recommendation system", style = "color:#FFA500")),
sidebarLayout(position = "left",
sidebarPanel(width =3,
# chose standard pipeline
selectInput("selectpipe", "select standard pipeline:", choices = pipechoices),
# software details
*uiOutput("pipelinestep")*, # software per pipeline step,
# construct software workflow based on selected pipeline step
uiOutput("pconst")
))))
server.R
从第5行到第7行看。“选择”会在检测到更改后立即分配新值。请参阅此处的文档:http://shiny.rstudio.com/articles/dynamic-ui.html
pipelinestepsoftInput <<- reactive({
mypipefilter <- input$pipelinestep
softperpipe <<- mysoft[mysoft$goal==mypipefilter ,c(1,3,5:7), drop = FALSE]
## provides software choices related to the pipeline step
output$pconst <<- renderUI({selectizeInput(
'pconst', 'construct software workflow', choices = as.character(mysoft[mysoft$goal==mypipefilter, 3]),
multiple = TRUE, options = list(maxItems = 1))})
## input for outputDataTable
softperpipe
})