设置pickerInput()所做的最大选择数
提问于 2022-03-01 11:14:38
我试图将pickerInput()在shiny应用程序中的最大选择数限制为两个，但我无法让它工作。
library(shiny)
library(shinydashboard)
library(plotly)
library(shinyWidgets)
header <- dashboardHeader()
sidebar <- dashboardSidebar(
fluidRow(column(12,
pickerInput(
inputId = "iss",
label = "Issue",
choices = colnames(mtcars),
multiple = T,
options = list("max-options-group" = 2)
)
))
)
body <- dashboardBody(fluidPage(
)
)
ui <- dashboardPage(title = 'Search', header, sidebar, body)
server <- function(input, output, session) {
}
shinyApp(ui = ui, server = server)
回答 2
Stack Overflow用户
回答已采纳
发布于 2022-03-01 16:34:58
问题是您使用的是"max-options-group"，但是在您的choices中没有使用任何组。您必须在"max-options" = 2的options参数中使用pickerInput()。
为了完整起见，这是您代码的修改版本。我们只能选择两个以上的选项：
library(shiny)
library(shinydashboard)
library(plotly)
library(shinyWidgets)
header <- dashboardHeader()
sidebar <- dashboardSidebar(
fluidRow(column(12,
pickerInput(
inputId = "iss",
label = "Issue",
choices = colnames(mtcars),
multiple = T,
options = list("max-options" = 2)
)
))
)
body <- dashboardBody(fluidPage(
)
)
ui <- dashboardPage(title = 'Search', header, sidebar, body)
server <- function(input, output, session) {
}
shinyApp(ui = ui, server = server)Stack Overflow用户
发布于 2022-03-01 15:23:05
尝尝这个
columns <- as.list(names(mtcars))
type <- as.list(1:ncol(mtcars))
header <- dashboardHeader()
sidebar <- dashboardSidebar(
fluidRow(column(12,
pickerInput(
inputId = "iss",
label = "Issue",
choices = list(Columns = columns,
Type = type),
selected = list(columns[[1]],type[[1]]),
multiple = T,
inline=TRUE,
options = list("max-options-group" = 1, `style` = "btn-info")
)
))
)
body <- dashboardBody(fluidPage())
ui <- dashboardPage(title = 'Search', header, sidebar, body)
server <- function(input, output, session) {}
shinyApp(ui = ui, server = server)页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/71313538
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