R 将对象列表转换为具有动态UI的标记列表时出错
我正在使用Shinny的renerUI根据问题的指示动态创建UI对象 我得到以下错误R 将对象列表转换为具有动态UI的标记列表时出错,r,shiny,R,Shiny,我正在使用Shinny的renerUI根据问题的指示动态创建UI对象 我得到以下错误 Error in if (!grepl(pattern, text)) return(text) : argument is of length zero 读完后我知道问题出在这一行 # Convert the list to a tagList do.call(tagList, plot_output_list) 但我正在做解决方案所建议的事情。 谢谢你的帮助 代码 Server.r shinySe
Error in if (!grepl(pattern, text)) return(text) :
argument is of length zero
读完后我知道问题出在这一行
# Convert the list to a tagList
do.call(tagList, plot_output_list)
但我正在做解决方案所建议的事情。
谢谢你的帮助
代码
Server.r
shinyServer(function(input, output) {
# Create an environment for storing data
symbol_env <- new.env()
output$plots <- renderUI({
if (input$goButton == 0)
return()
if (loaded_index != input$chosen_index) {
# ... alot of code to generate data.frames and plots
output[["summary"]] <- renderPlot(grid.arrange(g1,g2,g3,g4,g5,nrow=1))
for (i in 1:length(results)) {
# Need local so that each item gets its own number. Without it, the value
# of i in the renderPlot() will be the same across all instances, because
# of when the expression is evaluated.
local({
my_i <- i
plotname <- object_name("plot", names(results[my_i]))
output[[plotname]] <- renderPlot({
showme_plot(results[[names(results[my_i])]]$data , period = DEFAULT_TIME_PERIOD)})
tablename <- object_name("table", names(results[my_i]))
output[[tablename]] <- renderTable({
make_summary(names(results[my_i]))})
})
}
}
plot_output_list <- list()
# Graphical Summary
plot_output_list[["summary"]] <- tags$div(class="summary" , plotOutput("summary"))
# The List
for (symbol in names(results))
plot_output_list[[symbol]] <-
tags$div(class = "container" ,
tags$div(class = "name" , name(symbol)),
tags$div(class = "stats" , tableOutput(object_name("table", symbol))) ,
tags$div(class = "plot" , plotOutput(object_name("plot", symbol), height = 530)))
print("Plot structure defined")
# Convert the list to a tagList
do.call(tagList, plot_output_list)
})
})
require(shinyIncubator)
shinyUI(
bootstrapPage(
tags$script(src = "keyboard_scroller.js") ,
tags$link(rel="stylesheet" , type="text/css" , href="custom.css") ,
actionButton("goButton", "Go!") ,
selectInput("chosen_index" , "INDEX: " , list("A" = '1' , "B" = '2')) ,
# This is the dynamic UI for the plots
uiOutput("plots")
))
我想一个问题是
plot\u output\u list
不应该按字符串索引,而是按数字索引,即plot\u output\u list[[symbol]]