r - 一个下拉菜单的 R 闪亮 updateSelectInput 选项以及另一个下拉菜单的选择(即一个是另一个的子类别)
问题描述
我有一个MegaP2
器官类型的数据表,分为Lung和Skin,然后是各种细胞类型,所有这些都来自肺或皮肤。我试图让Cell Lines下拉框中的可用选项仅反映来自第一个下拉框中所选器官的选项。
如果我选择皮肤或肺,它会完美地提供相关的细胞系,但是如果我尝试选择其他器官类型,则会进一步将细胞系限制为仅在两个器官中的细胞系,而不是为新器官选择提供所有细胞系. 它还阻止我单击单元格行下拉菜单在此处进行更改。
我想我需要一些方法来让器官类型在做出新的选择时刷新,但任何帮助都将不胜感激。
我已经创建了选择列表,如下所示:
Cell_type = c("All", as.character(levels(MegaP2$Cell_line)))
Organ_type = as.character(levels(MegaP2$Organ))
Lung_cells = filter(MegaP2, Organ == "Lung")
#Then to remove the levels that have been filtered out
Lung_cells = droplevels(Lung_cells)
Lung_lines = c("All", as.character(levels(Lung_cells$Cell_line)))
Skin_cells = filter(MegaP2, Organ == "Skin")
Skin_cells = droplevels(Skin_cells)
Skin_lines = c("All", as.character(levels(Skin_cells$Cell_line)))
我的(相关)ui 代码如下所示:
ui = fluidPage(
titlePanel(title=div(img(src="cell_image.png", height = 140, width = 400), "The Senescent Cell")),
sidebarLayout(
sidebarPanel(
selectInput("OrganT",
label = "Organ",
choices = Organ_type,
multiple = T,
selected = "All"),
selectInput("Cell",
label = "Cell Line",
choices = Cell_type,
multiple = T,
selected = "All")
),
mainPanel(
tableOutput("MegaData")
)
)
)
我的服务器代码如下:如果导致问题,我将保留在 Select All 会话更新中,因为理想情况下我希望它也可以与这些一起工作。
server = function(input, output, session) {
selectedData <- reactive({
req(input$OrganT)
req(input$Cell)
MegaP2 %>%
dplyr::filter(Cell_line %in% input$Cell & Organ %in% input$OrganT)
})
output$MegaData = renderTable({
data = selectedData()
})
observe({
if("Lung" %in% input$OrganT & !"Skin" %in% input$OrganT)
choices2 = Cell_type[which(Cell_type %in% Lung_lines)]
else if("Skin" %in% input$OrganT & !"Lung" %in% input$OrganT)
choices2 = Cell_type[which(Cell_type %in% Skin_lines)]
else
choices2 = Cell_type
updateSelectInput(session, "Cell", choices = choices2, selected = choices2)
if("All" %in% input$Cell)
selected_choices6 = choices2[-1]
else
selected_choices6 = input$Cell
updateSelectInput(session, "Cell", selected = selected_choices6)
})
}
解决方案
我认为您应该直接使用数据表来选择选项。也许你可以试试这个
ui = fluidPage(
titlePanel(title=div(img(src="cell_image.png", height = 140, width = 400), "The Senescent Cell")),
sidebarLayout(
sidebarPanel(
uiOutput("organt"),
uiOutput("cellt")
),
mainPanel(
tableOutput("MegaData")
)
)
)
server = function(input, output, session) {
df1 <- veteran
MegaP <- df1 %>% mutate(Organ=ifelse(trt==1,"Lung","Skin"))
output$organt <- renderUI({
selectInput("OrganT",
label = "Organ",
choices = unique(MegaP$Organ),
multiple = T,
selected = "All")
})
MegaP1 <- reactive({
data <- subset(MegaP, Organ %in% req(input$OrganT))
})
output$cellt <- renderUI({
selectInput("Cell",
label = "Cell Line",
choices = unique(MegaP1()$celltype),
multiple = T,
selected = "All")
})
selectedData <- reactive({
req(MegaP1(),input$Cell)
data <- subset(MegaP1(), celltype %in% input$Cell)
})
output$MegaData = renderTable({
selectedData()
})
}
shinyApp(ui = ui, server = server)