Here's some example of working Chart code - try it with changing a value of a given height.
Take a look at http://www.chartjs.org/docs/, it can be helpful too.
<canvas id="myChart" height="50"></canvas>
<script>
$(function () {
var data = {
labels: ["January", "February", "March", "April", "May", "June", "July"],
datasets: [
{
label: "My First dataset",
fillColor: "rgba(220,220,220,0.2)",
strokeColor: "rgba(220,220,220,1)",
pointColor: "rgba(220,220,220,1)",
pointStrokeColor: "#fff",
pointHighlightFill: "#fff",
pointHighlightStroke: "rgba(220,220,220,1)",
data: [65, 59, 80, 81, 56, 55, 40]
},
{
label: "My Second dataset",
fillColor: "rgba(151,187,205,0.2)",
strokeColor: "rgba(151,187,205,1)",
pointColor: "rgba(151,187,205,1)",
pointStrokeColor: "#fff",
pointHighlightFill: "#fff",
pointHighlightStroke: "rgba(151,187,205,1)",
data: [28, 48, 40, 19, 86, 27, 90]
}
]
};
var option = {
responsive: true,
};
// Get the context of the canvas element we want to select
var ctx = document.getElementById("myChart").getContext('2d');
var myLineChart = new Chart(ctx).Line(data, option); //'Line' defines type of the chart.
});
</script>
