R 使用一个模块的结果/输出在另一个模块中更新SelectInput
在了解如何使用新的闪亮模块时,我想模拟以下应用程序。单击并取消选中数据表的行时,它会使用R 使用一个模块的结果/输出在另一个模块中更新SelectInput,r,shiny,R,Shiny,在了解如何使用新的闪亮模块时,我想模拟以下应用程序。单击并取消选中数据表的行时,它会使用updateSelectInput更新selectInput框中的条目 library(shiny) ## prepare dataframe ----------------------------------------------------------- df <- mtcars df$model <- rownames(df) rownames(df) <- NULL df &l
updateSelectInput
更新selectInput
框中的条目
library(shiny)
## prepare dataframe -----------------------------------------------------------
df <- mtcars
df$model <- rownames(df)
rownames(df) <- NULL
df <- df[1:10, c(12, 1:5)]
car_names <- data.frame(df$model)
## app -------------------------------------------------------------------------
ui <- fluidPage(
sidebarLayout(
sidebarPanel(
selectInput('car_input', 'Select car:', df$model, multiple = TRUE)
),
mainPanel(
DT::dataTableOutput('table')
)
)
)
server <- function(input, output, session, ...) {
output$table <- DT::renderDataTable(df)
car_rows_selected <- reactive(car_names[input$table_rows_selected, ])
observe({ updateSelectInput(session, 'car_input', selected = car_rows_selected()) })
}
shinyApp(ui = ui, server = server)
库(闪亮)
##准备数据帧-----------------------------------------------------------
df好的,再经过一点尝试和错误,我得到了正确的答案-所选的car\u rows\u项目需要给出双箭头
library(shiny)
## prepare dataframe -----------------------------------------------------------
df <- mtcars
df$model <- rownames(df)
rownames(df) <- NULL
df <- df[1:10, c(12, 1:5)]
car_names <- data.frame(df$model)
## select module ---------------------------------------------------------------
CarInput <- function(id){
ns <- NS(id)
selectInput(ns('car_input'), 'Select car:', df$model, multiple = TRUE)
}
Car <- function(input, output, session, ...) {
# I was thinking perhaps I needed to call the DFTable module as a nested module within this Car module
car_rows_selected <- callModule(DFTable, 'id_inner')
observe({ updateSelectInput(session, 'car_input', selected = car_rows_selected()) })
}
## datatable module ------------------------------------------------------------
DFTableOutput <- function(id){
ns <- NS(id)
DT::dataTableOutput(ns('table'))
}
DFTable <- function(input, output, session, ...){
output$table <- DT::renderDataTable(df)
return(reactive(car_names[input$table_rows_selected, ]))
}
## app -------------------------------------------------------------------------
ui <- fluidPage(
sidebarLayout(
sidebarPanel(
CarInput('id_car'),
textOutput('selected') # NB. this outputs expected values
),
mainPanel(
DFTableOutput('id_table')
)
)
)
server <- function(input, output, session, ...) {
callModule(Car, 'id_car')
callModule(DFTable, 'id_table')
output$selected <- callModule(DFTable, 'id_table') # NB this works as expected (see textOutput in ui section above)
car_rows_selected <- callModule(DFTable, 'id_table')
observe({ updateSelectInput(session, 'car_input', selected = car_rows_selected()) })
}
shinyApp(ui = ui, server = server)
library(shiny)
## prepare dataframe -----------------------------------------------------------
df <- mtcars
df$model <- rownames(df)
rownames(df) <- NULL
df <- df[1:10, c(12, 1:5)]
car_names <- data.frame(df$model)
## select module ---------------------------------------------------------------
CarInput <- function(id){
ns <- NS(id)
selectInput(ns('car_input'), 'Select car:', df$model, multiple = TRUE)
}
Car <- function(input, output, session, ...) {
observe({ updateSelectInput(session, 'car_input', selected = car_rows_selected()) })
}
## datatable module ------------------------------------------------------------
DFTableOutput <- function(id){
ns <- NS(id)
DT::dataTableOutput(ns('table'))
}
DFTable <- function(input, output, session, ...){
output$table <- DT::renderDataTable(df)
reactive(car_names[input$table_rows_selected, ])
}
## app -------------------------------------------------------------------------
ui <- fluidPage(
sidebarLayout(
sidebarPanel(
CarInput('id_car')
),
mainPanel(
DFTableOutput('id_table')
)
)
)
server <- function(input, output, session, ...) {
callModule(Car, 'id_car')
car_rows_selected <<- callModule(DFTable, 'id_table')
}
shinyApp(ui = ui, server = server)