Decimal Data

var decimal_data = [];
for (var x = 0; x <= 360; x += 10) {
  decimal_data.push({
    x: x,
    y: 1.5 + 1.5 * Math.sin(Math.PI * x / 180).toFixed(4)
  });
}
window.m = Morris.Line({
  element: 'graph',
  data: decimal_data,
  xkey: 'x',
  ykeys: ['y'],
  labels: ['sin(x)'],
  parseTime: false,
  hoverCallback: function (index, options) {
    var row = options.data[index];
    return "1.5 + 1.5 sin(" + row.x + ") = " + row.y;
  },
  xLabelMargin: 10
});