R Shiny:使用输出中的变量在函数之外进行进一步的计算 [英] R Shiny: Using variables from output for further calculation outside of function
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问题描述
到目前为止,我的闪亮应用程序外观如下(提取):
My shiny app looks as follows so far (extract):
ui <- fluidPage(
headerPanel("title"),
sidebarLayout(
sidebarPanel(
h4("header"),
tags$hr(),
# Input: Bilanzpositionen Passiv ----
fileInput("file1", "Kollektive hochladen",
multiple = TRUE,
accept = c("text/csv",
"text/comma-separated-values,text/plain",
".csv")),
)
)
)
# # # # #
server <- function(input, output) {
output$contents <- renderTable({
req(input$file1)
bipop <- read.csv(input$file1$datapath,
sep = input$sep,
quote = input$quote)
if(input$disp == "head") {
return(head(bipop))
}
else {
bipop
}
})
}
稍后在代码(服务器)中,我想从输入"bipop"中提取一些数据以创建一些新表,这些表将作为另一个输出的一部分.
Later on in code (server) I want to extract some data from the Input "bipop" to create some new tables which shall be part of another output.
我的审判
monate <- bipop[,4]
不起作用:错误:...已选择未定义的列..."和错误:未找到对象"
doesn't work: "Error: ... undefined columns selected..." and "Error: object ... not found"
如何将变量"bipop"定义为全局变量,以便可以在输出"的代码之外使用它?
How can I define the variable "bipop" as global, so that I can use it outside of the code from "output"?
谢谢.
推荐答案
为扩展@ A.Suliman的评论,这是一个完整的示例.
To expand @A.Suliman's comment, here is a complete example.
library(shiny)
ui <- fluidPage(
sidebarLayout(
sidebarPanel(
h4("header"),
tags$hr(),
# Input: Bilanzpositionen Passiv ----
fileInput("file1", "Kollektive hochladen",
multiple = TRUE,
accept = c("text/csv",
"text/comma-separated-values,text/plain",
".csv"))
),
mainPanel(
tableOutput("contents"),
verbatimTextOutput("test")
)
)
)
# # # # #
server <- function(input, output) {
bipop <- eventReactive(input$file1, {
read.csv(input$file1$datapath)
})
output$contents <- renderTable({
bipop()
})
output$test <- renderPrint({
summary(bipop())
})
}
shinyApp(ui, server)
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