Shiny leaflet map 无功

Question

I am in the process of making a shiny app. I am trying to make my map interactive where the map shows only the selected Sites. Although, right now my map is showing the location of every single site in the data. This is what I have tried doing so far.( this is a simplified code)

Site_Name <-sample(c('a','b','c'),replace=T,5)
Latitude <-runif(5,min=-26, max=-22)
Longitude<-runif(5,min=-54, max=-48)
Sites <-data.frame(Site_Name,Latitude,Longitude)



fluidPage(
  theme = shinytheme("cerulean"),
  sidebarLayout(
    sidebarPanel(
      selectizeInput("sites",
                     "Site Name",choices= Sites$Site_Name,
                     options= list(maxItems = 2)),
   

   mainPanel(
      tabsetPanel(
        tabPanel("Plots",leafletOutput("Station")
   )
  )

shinyServer(function(input, output, session) {

df1 <- eventReactive(input$sites, {
    Sites %>% dplyr::filter(Site_Name %in% input$sites)
  })
  
  output$Station = renderLeaflet({
    leaflet(data = df1()) %>%
      addProviderTiles(providers$Esri.WorldStreetMap) %>%
      addMarkers(Sites$Longitude, Sites$Latitude, popup= input$sites,
                 icon = list(
                   iconUrl = 'https://raw.githubusercontent.com/pointhi/leaflet-color-markers/master/img/marker-icon-2x-red.png',
                   iconSize = c(13, 20)))
  })
}

Answer 1

It's showing all because you told to show all. You should replace Sites$Longitude, Sites$Latitude, popup= input$sites in addMarkers with lng = ~Longitude, lat = ~Latitude, popup= ~Site_Name .