google.load('visualization', '1', {packages: ['corechart']});

​

function drawVisualization() {

        var jsonDataSet = [["28-12-2013",4],["28-12-2013",2.1],["29-12-2013",2.2],["30-12-2013",2.4],["31-12-2013",3.9],["01-01-2014",3.1],["02-01-2014",4]];

        // Create the data table.

        var data = new google.visualization.DataTable();

        data.addColumn('string', 'Date');

        data.addColumn('number', 'Credibility');

        data.addRows(jsonDataSet);

        // Set chart options

        var chartOptions  = {

          chartArea: {

            height: 220,

            width: 340,

            left: 20,

            top: 5

          },

          legend: 'none',

          titlePosition: 'none',

          width: 370,

          height: 280,

          vAxis: {

            format: '0',

            ticks: [0,1,2,3,4,5],

            viewWindowMode: 'maximized'

          },

          hAxis: {

            slantedText: true,

            slantedTextAngle: 40,

            viewWindowMode: 'maximized'

          }

        };

        var credibilityChart = new google.visualization.LineChart(document.getElementById('visualization'));

        // Draw chart, passing in some options.

        credibilityChart.draw(data, chartOptions);

      }

      google.setOnLoadCallback(drawVisualization);