Client-side JavaScript for dashboard demo. (https://mogsdad.wordpress.com/2015/07/19/converting-from-uiapp-chart-service-to-html-service-google-visualization-api/)

Dashboard-JavaScript.html

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script type="text/javascript"  src="https://www.google.com/jsapi"></script>

<script>
  // Load the Visualization API and desired package(s).
  google.load('visualization', '1.0', {'packages':['controls']});

  /**
   * Run initializations on dialog load.
   */
  $(function() {
    // Set a callback to run when the Google Visualization API is loaded.
    // Note: could also be accomplished via google.load options.
    google.setOnLoadCallback(sendQuery);

    // Assign handler functions to dialog elements here, if needed.

    // Call the server here to retrieve any information needed to build
    // the dialog, if necessary.
  });

  /**
   * Issue asynchronous request for spreadsheet data.
   * From gist.github.com/mogsdad/60dcc4116ed74fceb5f9
   */
  function sendQuery() {
    google.script.run
      .withSuccessHandler(drawDashboard)
      .withFailureHandler(function(msg) {
            // Respond to failure conditions here.
            $('#main-heading').text(msg);
            $('#main-heading').addClass("error");
            $('#error-message').show();
          })
      .getSpreadsheetData();
  }

  /**
   * Callback function to generate visualization using data in response parameter.
   * From gist.github.com/mogsdad/60dcc4116ed74fceb5f9
   * 
   * @param {Object[][]}  Two-Dim array of visualization data
   */
  function drawDashboard(response) {
    $('#main-heading').addClass("hidden");

    if (response == null) {
      alert('Error: Invalid source data.')
      return;
    }
    else {
      // Transmogrify spreadsheet contents (array) to a DataTable object
      var data = google.visualization.arrayToDataTable(response,false);

      var dashboard = new google.visualization.Dashboard(document.getElementById('dashboard-div'));

      var pieChart = new google.visualization.ChartWrapper({
        'chartType': 'PieChart',
        'containerId': 'piechart-div',
        // The pie chart will use the columns 'Name' and 'Donuts eaten'
        // out of all the available ones.
        'view': {'columns': [0, 3]}
      });
    
      var table = new google.visualization.ChartWrapper({
        'chartType': 'Table',
        'containerId': 'table-div'
      });

      var donutSlider = new google.visualization.ControlWrapper({
        'controlType': 'NumberRangeFilter',
        'containerId': 'slider-div',
        'options': {
          'filterColumnLabel': 'Age'
         }
      });
    
      var genderPicker = new google.visualization.ControlWrapper({
        'controlType': 'CategoryFilter',
        'containerId': 'selector-div',
        'options': {
          'filterColumnLabel': 'Gender'
        }
      });

      // Set up dependencies between controls and charts
      dashboard.bind(donutSlider, [pieChart,table]);
      dashboard.bind(genderPicker, [pieChart,table]);

      // Draw all visualization components of the dashboard
      dashboard.draw(data);
    }
  }  

</script>

Hello World, this is my first question here. I'm using this code to create my first dashboard. My sheet have many columns and I'd like to display only some of them but not all in the table. It would be column a, d, i, k, l, m or their indexes or names.
Anyone can tell me how can I do that? I'm at a lost.
Thank you