title: Google Chart arrayToDataTable formatted value not working
body: <p>I am followinf the google Chart documentation for <a href="https://google-developers.appspot.com/chart/interactive/docs/datatables_dataviews?hl=en#arraytodatatable" rel="nofollow">arrayToDataTable</a> and the example states that I can use formatted values, like that:</p>
  
  <pre><code>var data = google.visualization.arrayToDataTable([
  ['Employee Name', 'Salary'],
  ['Mike', {v:22500, f:'18,500'}],
  ...
  </code></pre>
  
  <p>where <strong>f:'18,500</strong> is the formatted value to show. My code looks identical:</p>
  
  <pre><code>var data = google.visualization.arrayToDataTable([
  ['Category', 'Amount'],
  ['Food', {v:5595.819984, f:'5.595,82'}], 
  ['Home', {v:1890.530002, f:'1.890,53'}], 
  ['Mail', {v:8.380000, f:'8,38'}], 
  ['Train', {v:564.899998, f:'564,90'}], 
  ['Photo', {v:959.119995, f:'959,12'}], 
  ['Lego', {v:428.760004, f:'428,76'}], 
  ...
  </code></pre>
  
  <p>but the chart does not even shows, crashing. If I take out the formatted data, it works perfectly.
  What I am doing wrong? How can I use a better looking version to show the values on the chart? </p>