/* responsive options */

var responsiveOptions = [
    ['screen and (max-width: 1920px)', {
      axisX: {
        labelInterpolationFnc: function skipLabels(value, index) {
          return index % 2  === 0 ? value : null;
        }
      }
    }],
    ['screen and (max-width: 1536px)', {
      axisX: {
        labelInterpolationFnc: function skipLabels(value, index) {
          return index % 2  === 0 ? value : null;
        }
      }
    }],
    ['screen and (max-width: 1440px)', {
      axisX: {
        labelInterpolationFnc: function skipLabels(value, index) {
          return index % 3  === 0 ? value : null;
        }
      }
    }],
    ['screen and (max-width: 800px)', {
      axisX: {
        labelInterpolationFnc: function skipLabels(value, index) {
          return index % 5  === 0 ? value : null;
        }
      }
    }],
    ['screen and (max-width: 400px)', {
      axisX: {
        labelInterpolationFnc: function skipLabels(value, index) {
          return index % 6  === 0 ? value : null;
        }
      }
    }],
     ['screen and (max-width: 300px)', {
      axisX: {
        labelInterpolationFnc: function skipLabels(value, index) {
          return index % 7  === 0 ? value : null;
        }
      }
    }]
  ];

/* end responsive options */