R传单和闪亮地图如何清除点击数据
下面的例子摘自传单。我稍微修改了一下以适应我的问题 我有一张地图(这里是地震),我用R传单和闪亮地图如何清除点击数据,r,shiny,leaflet,R,Shiny,Leaflet,下面的例子摘自传单。我稍微修改了一下以适应我的问题 我有一张地图(这里是地震),我用addCircleMarkers在地图上绘制,点击后,会出现一个带有一些信息的弹出窗口。我想在我的真实应用程序中做到的是,当在地图上单击一个标记时,它会过滤页面上的其他图形,只过滤与该标记相关的数据。我知道如何使用input$map\u marker\u click获取有关用户单击位置的信息-这将为我提供足够满足我需要的纬度和经度。但是-一旦设置,该值不会更改。当用户在非标记区域单击地图时,它不会恢复为NULL。
addCircleMarkers
在地图上绘制,点击后,会出现一个带有一些信息的弹出窗口。我想在我的真实应用程序中做到的是,当在地图上单击一个标记时,它会过滤页面上的其他图形,只过滤与该标记相关的数据。我知道如何使用input$map\u marker\u click
获取有关用户单击位置的信息-这将为我提供足够满足我需要的纬度和经度。但是-一旦设置,该值不会更改。当用户在非标记区域单击地图时,它不会恢复为NULL
。如何检测用户在地图中单击了标记以外的内容并将input$map\u marker\u click
重置为NULL
下面的示例没有其他图形,但我有它显示input$map\u marker\u click的值
library(shiny)
library(leaflet)
library(RColorBrewer)
ui <- bootstrapPage(
tags$style(type = "text/css", "html, body {width:100%;height:100%}"),
leafletOutput("map", width = "100%", height = "100%"),
absolutePanel(top = 10, right = 10,
sliderInput("range", "Magnitudes", min(quakes$mag), max(quakes$mag),
value = range(quakes$mag), step = 0.1
),
selectInput("colors", "Color Scheme",
rownames(subset(brewer.pal.info, category %in% c("seq", "div")))
),
checkboxInput("legend", "Show legend", TRUE),
verbatimTextOutput("clickInfo")
)
)
server <- function(input, output, session) {
output$clickInfo = renderPrint({input$map_marker_click})
filteredData <- reactive({
quakes[quakes$mag >= input$range[1] & quakes$mag <= input$range[2],]
})
colorpal <- reactive({
colorNumeric(input$colors, quakes$mag)
})
output$map <- renderLeaflet({
leaflet(quakes) %>% addTiles() %>%
fitBounds(~min(long), ~min(lat), ~max(long), ~max(lat))
})
observe({
pal <- colorpal()
leafletProxy("map", data = filteredData()) %>%
clearShapes() %>%
addCircleMarkers(radius = ~mag^2/3, weight = 1, color = "#777777",
fillColor = ~pal(mag), fillOpacity = 0.7, popup = ~paste(mag)
)
})
observe({
proxy <- leafletProxy("map", data = quakes)
proxy %>% clearControls()
if (input$legend) {
pal <- colorpal()
proxy %>% addLegend(position = "bottomright",
pal = pal, values = ~mag
)
}
})
}
shinyApp(ui, server)
库(闪亮)
图书馆(单张)
图书馆(RColorBrewer)
ui我问了同样的问题,用户NicE提供了一个解决方案
如果有人看到这个页面寻找解决方案,下面的代码实现了上面的请求,当在标记后单击地图时,将click值重置为NULL。示例中唯一的附加代码位于两行#s之间
库(闪亮)
图书馆(单张)
图书馆(RColorBrewer)
用户界面
library(shiny)
library(leaflet)
library(RColorBrewer)
ui <- bootstrapPage(
tags$style(type = "text/css", "html, body {width:100%;height:100%}"),
leafletOutput("map", width = "100%", height = "100%"),
absolutePanel(top = 10, right = 10,
sliderInput("range", "Magnitudes", min(quakes$mag), max(quakes$mag),
value = range(quakes$mag), step = 0.1
),
selectInput("colors", "Color Scheme",
rownames(subset(brewer.pal.info, category %in% c("seq", "div")))
),
checkboxInput("legend", "Show legend", TRUE),
verbatimTextOutput("clickInfo")
)
)
server <- function(input, output, session) {
#########################################################
data <- reactiveValues(clickedMarker=NULL)
observeEvent(input$map_marker_click,
{data$clickedMarker <- input$map_marker_click})
observeEvent(input$map_click,
{data$clickedMarker <- NULL})
output$clickInfo <- renderPrint({data$clickedMarker})
##########################################################
filteredData <- reactive({
quakes[quakes$mag >= input$range[1] & quakes$mag <= input$range[2],]
})
colorpal <- reactive({
colorNumeric(input$colors, quakes$mag)
})
output$map <- renderLeaflet({
leaflet(quakes) %>% addTiles() %>%
fitBounds(~min(long), ~min(lat), ~max(long), ~max(lat))
})
observe({
pal <- colorpal()
leafletProxy("map", data = filteredData()) %>%
clearShapes() %>%
addCircleMarkers(radius = ~mag^2/3, weight = 1, color = "#777777",
fillColor = ~pal(mag), fillOpacity = 0.7, popup = ~paste(mag)
)
})
observe({
proxy <- leafletProxy("map", data = quakes)
proxy %>% clearControls()
if (input$legend) {
pal <- colorpal()
proxy %>% addLegend(position = "bottomright",
pal = pal, values = ~mag
)
}
})
}
shinyApp(ui, server)