我可以复制输出结果并在 R/Shiny 函数中使用它吗?
Can I copy the result of an output and use it in an R/Shiny function?
我想复制输出结果“我的存档”(不带扩展名的上传文件名)并在函数 ( name( ) ) 中使用它来从电子表格中读取列标签。有可能吗?
感谢您的帮助。
代码:
library(shiny)
ui <- fluidPage(
fileInput("archive", "upload file", accept = c(
".xlsx")),
textOutput("my_archive"),
textOutput("top"))
server <- function(input, output) {
csv <- reactive({
inFile <- input$archive
if (is.null(inFile))
return(NULL)
df<- read.xlsx(inFile$datapath, header=T)
return(df)
})
output$my_archive <- renderText({
# Test if file is selected
if (!is.null(input$x$datapath)) {
return(sub(".xlsx$", "", basename(input$archive$name)))
} else {
return(NULL)
}
})
output$top <-
renderPrint({
names("output$my_archive")
})
}
shinyApp(ui, server)
这将读取一个 xlsx 文件并输出不带扩展名的文件名和列名。
library(shiny)
library(tidyverse)
library(readxl)
library(stringr)
ui <- fluidPage(
fileInput("archive", "upload file", accept = c(
".xlsx")),
textOutput("my_archive"),
textOutput("top"))
)
server <- function(input, output, session) {
#read the file
csv <- reactive({
req(input$archive)
inFile <- input$archive
df<- read_xlsx(inFile$datapath)
print(df)
return(df)
})
#name of the file without extension
output$my_archive <- renderText({
# Test if file is selected
if (!is.null(input$archive)) {
return(str_replace(input$archive$name, '\.xlsx', ' ') )
} else {
return(NULL)
}
})
#column names
output$top <-
renderText({
names(csv())
})
}
shinyApp(ui, server)
我想复制输出结果“我的存档”(不带扩展名的上传文件名)并在函数 ( name( ) ) 中使用它来从电子表格中读取列标签。有可能吗?
感谢您的帮助。
代码:
library(shiny)
ui <- fluidPage(
fileInput("archive", "upload file", accept = c(
".xlsx")),
textOutput("my_archive"),
textOutput("top"))
server <- function(input, output) {
csv <- reactive({
inFile <- input$archive
if (is.null(inFile))
return(NULL)
df<- read.xlsx(inFile$datapath, header=T)
return(df)
})
output$my_archive <- renderText({
# Test if file is selected
if (!is.null(input$x$datapath)) {
return(sub(".xlsx$", "", basename(input$archive$name)))
} else {
return(NULL)
}
})
output$top <-
renderPrint({
names("output$my_archive")
})
}
shinyApp(ui, server)
这将读取一个 xlsx 文件并输出不带扩展名的文件名和列名。
library(shiny)
library(tidyverse)
library(readxl)
library(stringr)
ui <- fluidPage(
fileInput("archive", "upload file", accept = c(
".xlsx")),
textOutput("my_archive"),
textOutput("top"))
)
server <- function(input, output, session) {
#read the file
csv <- reactive({
req(input$archive)
inFile <- input$archive
df<- read_xlsx(inFile$datapath)
print(df)
return(df)
})
#name of the file without extension
output$my_archive <- renderText({
# Test if file is selected
if (!is.null(input$archive)) {
return(str_replace(input$archive$name, '\.xlsx', ' ') )
} else {
return(NULL)
}
})
#column names
output$top <-
renderText({
names(csv())
})
}
shinyApp(ui, server)