在闪亮的应用程序中绘制GoogleMaps

我认为在一个闪亮的应用程序中使用plotGoogleMaps来使用R动态分析和显示空间数据会非常酷。我以前从未使用过这两个包（它们相对较新）并且没有太多的编程经验，所以我从每个的教程和示例，然后尝试将它们混合在一起。

我可以让代码的所有单独元素正常工作，但运行应用程序不会显示谷歌地图。我猜这与plotGoogleMaps尝试在浏览器中绘图以及shiny尝试在浏览器中渲染绘图有关，但我不知道如何解决这个问题。我从中提取了大部分闪亮的代码闪亮的教程输入和输出并遵循绘图GoogleMaps 教程

测试代码：

#load packages and data
library(shiny)
library(plotGoogleMaps)
data(meuse)

#convert data frame to SpatialPointDataFrame and set 
coordinates(meuse)<-~x+y
proj4string(meuse) <- CRS('+init=epsg:28992')

#will need to select column name for app, maybe not best way to do this, 
#but seems to work
formulaText<-paste('zinc')

#plot data on Google map, opens browser and works
mpgPlot <- plotGoogleMaps(meuse, zcol=formulaText)

ui.R

library(shiny)

# Define UI for meuse test
shinyUI(pageWithSidebar(

    # Application title
    headerPanel("Meuse Test"),

    # Sidebar with controls to select the variable to plot on map
    sidebarPanel(
        selectInput("variable", "Variable:",
                                choices=list("Zinc" = "zinc", 
                                         "Lead" = "lead", 
                                         "Copper" = "copper"), 
                                selected="Zinc")

    ),

    # Show the caption and plot of the requested variable on map
    mainPanel(
        plotOutput("mapPlot")
    )
))

server.R

library(shiny)
library(plotGoogleMaps)

data(meuse)
coordinates(meuse)<-~x+y
proj4string(meuse) <- CRS('+init=epsg:28992')

# Define server logic required to plot various variables on map
shinyServer(function(input, output) {

    # Compute the forumla text in a reactive expression since it is 
    # shared by the output$mapPlot ?I think I still need to do this...
    formulaText <- reactive({
#paste the input name in so it follows argument format for plotGoogleMaps?
#tried without, don't think it is probelm, works with test code...
        paste(input$variable)
    })


    # Generate a plot of the requested variable against mpg and only 
    # include outliers if requested
    output$mapPlot <- renderPlot({
        plotGoogleMaps(meuse, zcol=formulaText)
#also tried to specify alternative arguments like add=TRUE, 
#filename='mapPlot.htm', openMap=FALSE
    })
})

我知道shiny和plotGoogleMaps都是相当新的，我已经看到了一些向shiny Google群组发布问题的建议，但我不想重复发帖，StackOverflow是我寻求答案的地方。我最后还想为迄今为止为我提供了很多帮助的社区做出一点小小的贡献！如果这只是一个糟糕的方法，我愿意接受替代方案，我现在正在查看 googleVis...

谢谢， 亚历克斯

PS-

sessionInfo()
R version 3.0.1 (2013-05-16)
Platform: x86_64-w64-mingw32/x64 (64-bit)

locale:
[1] LC_COLLATE=English_United States.1252 
[2] LC_CTYPE=English_United States.1252   
[3] LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C                          
[5] LC_TIME=English_United States.1252    

attached base packages:
[1] grid      stats     graphics  grDevices utils     datasets  methods  
[8] base     

other attached packages:
[1] googleVis_0.4.3    plotGoogleMaps_2.0 maptools_0.8-25   
[4] lattice_0.20-15    foreign_0.8-54     rgdal_0.8-10      
[7] sp_1.0-11          shiny_0.6.0       

loaded via a namespace (and not attached):
[1] bitops_1.0-5   caTools_1.14   digest_0.6.3   httpuv_1.0.6.3
[5] Rcpp_0.10.4    RJSONIO_1.0-3  tools_3.0.1    xtable_1.7-1 

PPS-我读过这个帖子在发帖前好几次，但现在我怀疑我的答案是否在那里。如果问题重复，请道歉。我认为这与htmlOutput()... ?htmlOutput稀疏……我感觉浓密……

谢谢拉姆纳特夫的代码我设法嵌入plotGoogleMaps在没有任何 .html 编程知识的情况下闪亮：

library(plotGoogleMaps)
library(shiny)

runApp(list(
  ui = pageWithSidebar(
   headerPanel('Map'),
   sidebarPanel(""),
   mainPanel(uiOutput('mymap'))
   ),
   server = function(input, output){
    output$mymap <- renderUI({
      data(meuse)
      coordinates(meuse) = ~x+y
      proj4string(meuse) <- CRS("+init=epsg:28992")
      m <- plotGoogleMaps(meuse, filename = 'myMap1.html', openMap = F)
      tags$iframe(
        srcdoc = paste(readLines('myMap1.html'), collapse = '\n'),
        width = "100%",
        height = "600px"
      )
    })
   }
))

请注意，不显示图例。我已经发布了有关此问题的问题别处。