title: Google Maps polylines not displaying at all
body: <p>I have generated some Javascript using the googleVis package for R.  When I do so, the polylines do not display.  I've tried various browsers and it fails in all of them.  I am going to show you first some minimalist R code, which generates the problem. I'm then going to show you the HTML/Javascript it creates.  Can someone tell me if I am doing something wrong and what the fix might be.</p>
  
  <p>The R code</p>
  
  <pre><code> require(googleVis)
   df &lt;- data.frame(Postcode =      c("77003","08540","80545"),Tip=c("Houston","Princeton","Red Feather Lakes"))
   M &lt;- gvisMap(df, "Postcode", "Tip",
            options=list(showLine=TRUE,lineWidth=20,lineColor='red'))
   plot(M)
   cat(unlist(M))
  </code></pre>
  
  <p>The resulting HTML/Javascript</p>
  
  <pre><code>&lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"&gt;
  &lt;html xmlns="http://www.w3.org/1999/xhtml"&gt;
  &lt;head&gt;
  &lt;title&gt;MapID88977a251b2&lt;/title&gt;
  &lt;meta http-equiv="content-type" content="text/html;charset=utf-8" /&gt;
  &lt;style type="text/css"&gt;
  body {
    color: #444444;
    font-family: Arial,Helvetica,sans-serif;
    font-size: 75%;
    }
    a {
    color: #4D87C7;
    text-decoration: none;
  }
  &lt;/style&gt;
  &lt;/head&gt;
  &lt;body&gt;
   &lt;!-- Map generated in R 3.2.2 by googleVis 0.5.10 package --&gt;
  &lt;!-- Mon Sep  7 16:32:28 2015 --&gt;
  
  
  &lt;!-- jsHeader --&gt;
  &lt;script type="text/javascript"&gt;
  
  // jsData 
  function gvisDataMapID88977a251b2 () {
  var data = new google.visualization.DataTable();
  var datajson =
  [
   [
   "77003",
  "Houston" 
  ],
  [
   "08540",
  "Princeton" 
  ],
  [
   "80545",
  "Red Feather Lakes" 
  ] 
  ];
  data.addColumn('string','Postcode');
  data.addColumn('string','Tip');
  data.addRows(datajson);
  return(data);
  }
  
  // jsDrawChart
  function drawChartMapID88977a251b2() {
  var data = gvisDataMapID88977a251b2();
  var options = {};
  options["showTip"] = true;
  options["showLine"] = true;
  options["lineWidth"] =     20;
  options["lineColor"] = "red";
  
  
      var chart = new google.visualization.Map(
      document.getElementById('MapID88977a251b2')
      );
      chart.draw(data,options);
  
  
  }
  
  
  // jsDisplayChart
  (function() {
  var pkgs = window.__gvisPackages = window.__gvisPackages || [];
  var callbacks = window.__gvisCallbacks = window.__gvisCallbacks || [];
  var chartid = "map";
  
  // Manually see if chartid is in pkgs (not all browsers support Array.indexOf)
  var i, newPackage = true;
  for (i = 0; newPackage &amp;&amp; i &lt; pkgs.length; i++) {
  if (pkgs[i] === chartid)
  newPackage = false;
  }
  if (newPackage)
    pkgs.push(chartid);
  
  // Add the drawChart function to the global list of callbacks
  callbacks.push(drawChartMapID88977a251b2);
  })();
  function displayChartMapID88977a251b2() {
    var pkgs = window.__gvisPackages = window.__gvisPackages || [];
    var callbacks = window.__gvisCallbacks = window.__gvisCallbacks || [];
    window.clearTimeout(window.__gvisLoad);
    // The timeout is set to 100 because otherwise the container div we are
    // targeting might not be part of the document yet
    window.__gvisLoad = setTimeout(function() {
    var pkgCount = pkgs.length;
    google.load("visualization", "1", { packages:pkgs, callback: function() {
    if (pkgCount != pkgs.length) {
    // Race condition where another setTimeout call snuck in after us; if
    // that call added a package, we must not shift its callback
    return;
  }
  while (callbacks.length &gt; 0)
  callbacks.shift()();
  } });
  }, 100);
  }
  
  // jsFooter
  &lt;/script&gt;
  
  &lt;!-- jsChart --&gt;  
  &lt;script type="text/javascript" src="https://www.google.com/jsapi?callback=displayChartMapID88977a251b2"&gt;&lt;/script&gt;
  
  &lt;!-- divChart --&gt;
  
  &lt;div id="MapID88977a251b2" 
    style="width: 500; height: automatic;"&gt;
  &lt;/div&gt;
   &lt;div&gt;&lt;span&gt;Data: df &amp;#8226; Chart ID: &lt;a href="Chart_MapID88977a251b2.html"&gt;MapID88977a251b2&lt;/a&gt; &amp;#8226; &lt;a href="https://github.com/mages/googleVis"&gt;googleVis-0.5.10&lt;/a&gt;&lt;/span&gt;&lt;br /&gt; 
  &lt;!-- htmlFooter --&gt;
  &lt;span&gt; 
    R version 3.2.2 (2015-08-14) 
    &amp;#8226; &lt;a href="https://developers.google.com/terms/"&gt;Google Terms of Use&lt;/a&gt; &amp;#8226; &lt;a href="https://google-developers.appspot.com/chart/interactive/docs/gallery/map"&gt;Documentation and Data Policy&lt;/a&gt;
  &lt;/span&gt;&lt;/div&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>