我到处都看过,似乎无法找到必须解决的常见问题的帮助。
我在一个datatable
应用中有一个shiny
。当它第一次出现时,我将数据加载到其中。它由一列文字组成
我希望用户能够按下一个按钮,该按钮获取datatable
中的数据并对其执行操作,然后显示一个带有该功能结果的datatable
。该功能(未显示)基本上将单列分成几列。
我似乎无法弄清楚如何从刷新并显示新datatable
的按钮中运行功能。
这是我到目前为止所拥有的:
server.R
library(shiny)
library(EndoMineR)
RV <- reactiveValues(data = PathDataFrameFinalColon)
server <- function(input, output) {
output$mytable = DT::renderDT({
RV$data
})
output2$mytable = DT::renderDT({
RV$data<-myCustomFunction(RV$data)
})
}
ui.R
library(shiny)
basicPage(
fluidPage(
DT::dataTableOutput("mytable")
))
基本上,如何允许页面上的按钮运行特定的功能,然后再更新数据表?
答案 0 :(得分:0)
您可以使用observeEvent()
和ignoreInit = TRUE
,以便在不应用功能的情况下呈现初始数据帧。
server <- function(input, output) {
RV <- reactiveValues(data = PathDataFrameFinalColon)
output$mytable = DT::renderDT({
RV$data
})
observeEvent(input$my_button,{
RV$data<-myCustomFunction(RV$data)
},ignoreInit = TRUE)
}
ui <- basicPage(
fluidPage(
DT::dataTableOutput("mytable"),
actionButton("my_button",label = "Run Function")
))
答案 1 :(得分:0)
希望这对您有所帮助。玩得开心;
library(shiny)
library(shinydashboard)
dat = data.frame(id = c("d","a","c","b"), a = c(1,2,3,4), b = c(6,7,8,9))
header <- dashboardHeader(
)
sidebar <- dashboardSidebar(
tags$head(tags$style(HTML('.content-wrapper { height: 1500px !important;}'))),
sidebarMenu (
menuItem("A", tabName = "d1"),
menuItem("B", tabName = "d2"),
menuItem("C", tabName = "d3")
)
)
body <- dashboardBody(
tabItems(
tabItem(tabName = "d1",
box(title = "AAA",
actionButton("refreshTab1_id", "Refresh Tab 1"),
actionButton("sortTable1_id", "Sort Table 1"),
DT::dataTableOutput("table_for_tab_1", width = "100%"))
),
tabItem(tabName = "d2",
box(title = "BBB",
actionButton("refreshTab2_id", "Refresh Tab 2"),
actionButton("sortTable2_id", "Sort Table 2"),
DT::dataTableOutput("table_for_tab_2", width = "100%"))
),
tabItem(tabName = "d3",
box(title = "CCC",
actionButton("refreshTab3_id", "Refresh Tab 3"),
actionButton("sortTable3_id", "Sort Table 3"),
DT::dataTableOutput("table_for_tab_3", width = "100%"))
)
)
)
# UI
ui <- dashboardPage(header, sidebar, body)
# Server
server <- function(input, output, session) {
observe({
if (input$sortTable1_id || input$sortTable2_id || input$sortTable3_id) {
dat_1 = dat %>% dplyr::arrange(id)
} else {
dat_1 = dat
}
output$table_for_tab_1 <- output$table_for_tab_2 <- output$table_for_tab_3 <- DT::renderDataTable({
DT::datatable(dat_1,
filter = 'bottom',
selection = "single",
colnames = c("Id", "A", "B"),
options = list(pageLength = 10,
autoWidth = TRUE#,
# columnDefs = list(list(targets = 9,
# visible = FALSE))
)
)
})
})
observe({
if (input$refreshTab1_id || input$refreshTab2_id || input$refreshTab3_id) {
session$reload()
}
})
}
# Shiny dashboard
shiny::shinyApp(ui, server)