[英]Passing argument to a function in shiny R
I'm trying to pass the node value of a simple network as an argument to a function in Shiny R. However, I'm getting this error: 我试图将简单网络的节点值作为参数传递给Shiny R中的函数。但是,出现此错误:
Error in rsqlite_send_query: no such column: input$id rsqlite_send_query中的错误:没有这样的列:input $ id
Can anyone help with this issue? 谁能解决这个问题? Thanks.
谢谢。
library(shiny)
library(networkD3)
ui <- shinyUI(fluidPage(
fluidRow(
column(4, simpleNetworkOutput("simple")),
column(4, DT::dataTableOutput("table"))
)
))
server <- shinyServer(function(input, output, session) {
session$onSessionEnded(stopApp)
output$simple <- renderSimpleNetwork({
sn<-simpleNetwork(df)
sn$x$options$clickAction = 'Shiny.onInputChange("id",d.name)'
sn
})
output$table <- DT::renderDataTable(DT::datatable(get(funct(input$id))))
})
shinyApp(ui = ui, server = server)
take out the deparse
and substitute
from your sprintf
command, and add single quotes around the value you want to match in the SQL statement you're generating 取出
deparse
和substitute
从sprintf
命令,周围添加值单引号你想在你生成的SQL语句来匹配
get rid of the get
function because you're not trying to "get" an object 摆脱
get
函数,因为您不是要“获取”对象
for example.... 例如....
library(shiny)
library(networkD3)
library(DT)
library(sqldf)
df <- read.csv(header = T, text = '
source,name,age,hair
dad,Jon X,18,brown
dad,Jon Y,22,blonde
')
funct <-
function (n) {
isp <- sprintf("Select df.age From df Where df.name='%s';", n)
isd <- sqldf::sqldf(isp)
return(isd)
}
ui <- shinyUI(fluidPage(
fluidRow(
column(4, simpleNetworkOutput("simple")),
column(4, DT::dataTableOutput("table"))
)
))
server <- shinyServer(function(input, output, session) {
session$onSessionEnded(stopApp)
output$simple <- renderSimpleNetwork({
sn<-simpleNetwork(df)
sn$x$options$clickAction = 'Shiny.onInputChange("id",d.name)'
sn
})
output$table <- DT::renderDataTable(DT::datatable(funct(input$id)))
})
shinyApp(ui = ui, server = server)
however, if all you want is to display a value associated with a given selection, I highly suggest drastically reducing the complexity to something like this 但是,如果您只想显示与给定选择相关联的值,我强烈建议您将复杂性大幅度降低到这样的水平
library(shiny)
library(networkD3)
df <- read.csv(header = T, text = '
source,name,age,hair
dad,Jon X,18,brown
dad,Jon Y,22,blonde
')
ui <- shinyUI(fluidPage(
fluidRow(
column(4, simpleNetworkOutput("simple")),
column(4, textOutput("text"))
)
))
server <- shinyServer(function(input, output, session) {
session$onSessionEnded(stopApp)
output$simple <- renderSimpleNetwork({
sn <- simpleNetwork(df)
sn$x$options$clickAction <- 'Shiny.onInputChange("id", d.name)'
sn
})
output$text <- renderPrint({ df$age[df$name == input$id] })
})
shinyApp(ui = ui, server = server)
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