我有一个地图,叫做
business
,是从自然地球网站下载的。我创建了一个基本的地图输出,显示这张地图。主要使用了两列数据,即admin
(代表国家名称)和economy
。然后我在UI中添加了一个下拉列表框Business
,当我点击国家的多边形时,该列表将刷新并显示我点击的国家。我假设当我编写 p <- input$Map_shape_click
时,Shiny会知道p是一个business
对象,因此它具有admin
列,我引用这个admin
ID来刷新我的Business
下拉列表。但实际上不起作用。链接显示了我所看到的内容 - 当我点击其他国家时,下拉列表不会刷新。
server.r
country <- readOGR(dsn = tmp, layer = "ne_110m_admin_0_countries", encoding = "UTF-8")
business<-country[country@data$admin %in% c("Brazil","Colombia","Panama","Kazakhstan","Argentina","India","","Chile","Dominican Republic","United Kingdom","El Salvador","United States of America"),]
business@data$category <- factor(sample.int(20L, nrow(business@data), FALSE))
shinyServer(function(input, output,session) {
output$Map <- renderLeaflet({
factpal <- colorFactor(topo.colors(20), business@data$category)
state_popup <- paste0("<strong>Name of the country </strong>",
business$admin,
"<br><strong> information is </strong>",
business$economy)
leaflet() %>%
addProviderTiles("CartoDB.Positron") %>%
addPolygons(data=business,
layerId=~admin,
fillColor= ~factpal(category),
fillOpacity = 0.7,
color = "#BDBDC3",
weight = 1,
popup = state_popup,
highlight = highlightOptions(
weight = 5,
color = "#666",
dashArray = "",
fillOpacity = 0.7,
bringToFront = TRUE))})
observeEvent(input$Map_shape_click, { # update the location selectInput on map clicks
p <- input$Map_shape_click
if(!is.null(p$admin)){
if(is.null(input$Business) || input$Business!=p$admin) updateSelectInput(session, "Business", selected=p$admin)
}
})
}
)
ui.r
navbarPage("Market Portal",
tabPanel("About",
bootstrapPage(
leafletOutput("Map",width="100%",height="800px"),
absolutePanel(top=100, right=50,
selectInput("Business", "Business", c("Brazil","Colombia","Panama","Kazakhstan","Argentina","India","Chile","Dominican Republic","United Kingdom","El Salvador","United States of America"), selected="")
))))
map_shape_click
的返回值是坐标 (lat
,lng
) 和id
(即layerId
值),因此我认为您想要使用p$id
而不是p$admin
。 - SymbolixAU