【发布时间】：2020-03-12 22:13:10
【问题描述】：
我正在尝试使用模块创建一个闪亮的应用程序。两个数据帧（表 a 和 b）是反应性的，可以修改，第三个数据帧（表 c）也是反应性的，基于表 a 和 b。
我尝试关注这个question，它对文本输入而不是数据框做同样的事情，但我的代码不起作用 - 我得到一个object of type closure is not subsettable error。
感谢您的帮助。
### Libraries
library(shiny)
library(tidyverse)
library(DT)
### Data----------------------------------------
table_a <- data.frame(
id=seq(from=1,to=10),
x_1=rnorm(n=10,mean=0,sd=10),
x_2=rnorm(n=10,mean=0,sd=10),
x_3=rnorm(n=10,mean=0,sd=10),
x_4=rnorm(n=10,mean=0,sd=10)
) %>%
mutate_all(round,3)
table_b <- data.frame(
id=seq(from=1,to=10),
x_5=rnorm(n=10,mean=0,sd=10),
x_6=rnorm(n=10,mean=0,sd=10),
x_7=rnorm(n=10,mean=0,sd=10),
x_8=rnorm(n=10,mean=0,sd=10)
)%>%
mutate_all(round,3)
### Modules------------------------------------
mod_table_a <- function(input, output, session, data_in,reset_a) {
v <- reactiveValues(data = data_in)
proxy = dataTableProxy("table_a")
#set var 2
observeEvent(reset_a(), {
v$data[,"x_2"] <- round(rnorm(n=10,mean=0,sd=10),3)
replaceData(proxy, v$data, resetPaging = FALSE)
})
# render table
output$table_a <- DT::renderDataTable({
DT::datatable(
data=v$data,
editable = TRUE,
rownames = FALSE,
class="compact cell-border",
selection = list(mode = "single",
target = "row"
),
options = list(
dom="t",
autoWidth=TRUE,
scrollX = TRUE,
ordering=FALSE,
bLengthChange= FALSE,
searching=FALSE
)
)
})
return(v)
}
mod_table_b <- function(input, output, session, data_in,reset_b) {
v <- reactiveValues(data = data_in)
proxy = dataTableProxy("table_b")
#reset var
observeEvent(reset_b(), {
v$data[,"x_6"] <- round(rnorm(n=10,mean=0,sd=10),3)
replaceData(proxy, v$data, resetPaging = FALSE) # replaces data displayed by the updated table
})
# render table
output$table_b <- DT::renderDataTable({
DT::datatable(
data=v$data,
editable = TRUE,
rownames = FALSE,
class="compact cell-border",
selection = list(mode = "single",
target = "row"
),
options = list(
dom="t",
autoWidth=TRUE,
scrollX = TRUE,
ordering=FALSE,
bLengthChange= FALSE,
searching=FALSE
)
)
})
return(v)
}
mod_table_c <- function(input, output, session, tbl_a_proxy,tbl_b_proxy) {
v <- reactive({
table_c <- data.frame(id=seq(from=1,to=10)) %>%
left_join(tbl_a_proxy$data,by="id") %>%
left_join(tbl_b_proxy$data,by="id") %>%
mutate(y_1=x_1+x_6)%>%
select(x_2,x_6,y_1)
})
# render table
output$table_c <- DT::renderDataTable({
DT::datatable(
data=v$table_c,
editable = TRUE,
rownames = FALSE,
class="compact cell-border",
selection = list(mode = "single",
target = "row"
),
options = list(
dom="t",
autoWidth=TRUE,
scrollX = TRUE,
ordering=FALSE,
bLengthChange= FALSE,
searching=FALSE
)
)
})
}
modFunctionUI <- function(id) {
ns <- NS(id)
DT::dataTableOutput(ns(id))
}
### Shiny App---------
#ui----------------------------------
ui <- fluidPage(
fluidRow(
br(),
column(1,
br(),
actionButton(inputId = "reset_a", "Reset a")
),
column(6,
modFunctionUI("table_a")
),
column(1),
column(4)
),
fluidRow(
br(),
br(),
column(1,
br(),
actionButton(inputId = "reset_b", "Reset b")),
column(6,
modFunctionUI("table_b")
),
column(5,
modFunctionUI("table_c")
)
),
#set font size of tables
useShinyjs(),
inlineCSS(list("table" = "font-size: 10px"))
)
#server--------------
server <- function(input, output) {
#table a
tbl_a_proxy <- callModule(module=mod_table_a,
id="table_a",
data_in=table_a,
reset_a = reactive(input$reset_a)
)
#table b
tbl_b_proxy <- callModule(module=mod_table_b,
id="table_b",
data_in=table_b,
reset_b = reactive(input$reset_b)
)
#table c
callModule(module=mod_table_c,
id="table_c",
tbl_a_proxy,
tbl_b_proxy
)
}
shinyApp(ui, server)
【问题讨论】：