Easily create Multi Series Line Charts using JavaScript & CanvasJS. Plotting multiple data-series in a single chart makes it easier to compare and contrast between different data sets. Enabling legends or shared toolTip in multi series line chart can make it more readable. Given example shows the median price for house at different cities using Multi Series Line Charts. It also contains HTML & JavaScript source code that you can edit in-browser or save to run it locally.
window.onload = function () {
var chart = new CanvasJS.Chart("chartContainer", {
title: {
text: "House Median Price"
},
axisX: {
valueFormatString: "MMM YYYY"
},
axisY2: {
title: "Median List Price",
prefix: "$",
suffix: "K"
},
toolTip: {
shared: true
},
legend: {
cursor: "pointer",
verticalAlign: "top",
horizontalAlign: "center",
dockInsidePlotArea: true,
itemclick: toogleDataSeries
},
data: [{
type:"line",
axisYType: "secondary",
name: "San Fransisco",
showInLegend: true,
markerSize: 0,
yValueFormatString: "$#,###k",
dataPoints: [
{ x: new Date(2014, 00, 01), y: 850 },
{ x: new Date(2014, 01, 01), y: 889 },
{ x: new Date(2014, 02, 01), y: 890 },
{ x: new Date(2014, 03, 01), y: 899 },
{ x: new Date(2014, 04, 01), y: 903 },
{ x: new Date(2014, 05, 01), y: 925 },
{ x: new Date(2014, 06, 01), y: 899 },
{ x: new Date(2014, 07, 01), y: 875 },
{ x: new Date(2014, 08, 01), y: 927 },
{ x: new Date(2014, 09, 01), y: 949 },
{ x: new Date(2014, 10, 01), y: 946 },
{ x: new Date(2014, 11, 01), y: 927 },
{ x: new Date(2015, 00, 01), y: 950 },
{ x: new Date(2015, 01, 01), y: 998 },
{ x: new Date(2015, 02, 01), y: 998 },
{ x: new Date(2015, 03, 01), y: 1050 },
{ x: new Date(2015, 04, 01), y: 1050 },
{ x: new Date(2015, 05, 01), y: 999 },
{ x: new Date(2015, 06, 01), y: 998 },
{ x: new Date(2015, 07, 01), y: 998 },
{ x: new Date(2015, 08, 01), y: 1050 },
{ x: new Date(2015, 09, 01), y: 1070 },
{ x: new Date(2015, 10, 01), y: 1050 },
{ x: new Date(2015, 11, 01), y: 1050 },
{ x: new Date(2016, 00, 01), y: 995 },
{ x: new Date(2016, 01, 01), y: 1090 },
{ x: new Date(2016, 02, 01), y: 1100 },
{ x: new Date(2016, 03, 01), y: 1150 },
{ x: new Date(2016, 04, 01), y: 1150 },
{ x: new Date(2016, 05, 01), y: 1150 },
{ x: new Date(2016, 06, 01), y: 1100 },
{ x: new Date(2016, 07, 01), y: 1100 },
{ x: new Date(2016, 08, 01), y: 1150 },
{ x: new Date(2016, 09, 01), y: 1170 },
{ x: new Date(2016, 10, 01), y: 1150 },
{ x: new Date(2016, 11, 01), y: 1150 },
{ x: new Date(2017, 00, 01), y: 1150 },
{ x: new Date(2017, 01, 01), y: 1200 },
{ x: new Date(2017, 02, 01), y: 1200 },
{ x: new Date(2017, 03, 01), y: 1200 },
{ x: new Date(2017, 04, 01), y: 1190 },
{ x: new Date(2017, 05, 01), y: 1170 }
]
},
{
type: "line",
axisYType: "secondary",
name: "Manhattan",
showInLegend: true,
markerSize: 0,
yValueFormatString: "$#,###k",
dataPoints: [
{ x: new Date(2014, 00, 01), y: 1200 },
{ x: new Date(2014, 01, 01), y: 1200 },
{ x: new Date(2014, 02, 01), y: 1190 },
{ x: new Date(2014, 03, 01), y: 1180 },
{ x: new Date(2014, 04, 01), y: 1250 },
{ x: new Date(2014, 05, 01), y: 1270 },
{ x: new Date(2014, 06, 01), y: 1300 },
{ x: new Date(2014, 07, 01), y: 1300 },
{ x: new Date(2014, 08, 01), y: 1358 },
{ x: new Date(2014, 09, 01), y: 1410 },
{ x: new Date(2014, 10, 01), y: 1480 },
{ x: new Date(2014, 11, 01), y: 1500 },
{ x: new Date(2015, 00, 01), y: 1500 },
{ x: new Date(2015, 01, 01), y: 1550 },
{ x: new Date(2015, 02, 01), y: 1550 },
{ x: new Date(2015, 03, 01), y: 1590 },
{ x: new Date(2015, 04, 01), y: 1600 },
{ x: new Date(2015, 05, 01), y: 1590 },
{ x: new Date(2015, 06, 01), y: 1590 },
{ x: new Date(2015, 07, 01), y: 1620 },
{ x: new Date(2015, 08, 01), y: 1670 },
{ x: new Date(2015, 09, 01), y: 1720 },
{ x: new Date(2015, 10, 01), y: 1750 },
{ x: new Date(2015, 11, 01), y: 1820 },
{ x: new Date(2016, 00, 01), y: 2000 },
{ x: new Date(2016, 01, 01), y: 1920 },
{ x: new Date(2016, 02, 01), y: 1750 },
{ x: new Date(2016, 03, 01), y: 1850 },
{ x: new Date(2016, 04, 01), y: 1750 },
{ x: new Date(2016, 05, 01), y: 1730 },
{ x: new Date(2016, 06, 01), y: 1700 },
{ x: new Date(2016, 07, 01), y: 1730 },
{ x: new Date(2016, 08, 01), y: 1720 },
{ x: new Date(2016, 09, 01), y: 1740 },
{ x: new Date(2016, 10, 01), y: 1750 },
{ x: new Date(2016, 11, 01), y: 1750 },
{ x: new Date(2017, 00, 01), y: 1750 },
{ x: new Date(2017, 01, 01), y: 1770 },
{ x: new Date(2017, 02, 01), y: 1750 },
{ x: new Date(2017, 03, 01), y: 1750 },
{ x: new Date(2017, 04, 01), y: 1730 },
{ x: new Date(2017, 05, 01), y: 1730 }
]
},
{
type: "line",
axisYType: "secondary",
name: "Seatle",
showInLegend: true,
markerSize: 0,
yValueFormatString: "$#,###k",
dataPoints: [
{ x: new Date(2014, 00, 01), y: 409 },
{ x: new Date(2014, 01, 01), y: 415 },
{ x: new Date(2014, 02, 01), y: 419 },
{ x: new Date(2014, 03, 01), y: 429 },
{ x: new Date(2014, 04, 01), y: 429 },
{ x: new Date(2014, 05, 01), y: 450 },
{ x: new Date(2014, 06, 01), y: 450 },
{ x: new Date(2014, 07, 01), y: 445 },
{ x: new Date(2014, 08, 01), y: 450 },
{ x: new Date(2014, 09, 01), y: 450 },
{ x: new Date(2014, 10, 01), y: 440 },
{ x: new Date(2014, 11, 01), y: 429 },
{ x: new Date(2015, 00, 01), y: 435 },
{ x: new Date(2015, 01, 01), y: 450 },
{ x: new Date(2015, 02, 01), y: 475 },
{ x: new Date(2015, 03, 01), y: 475 },
{ x: new Date(2015, 04, 01), y: 475 },
{ x: new Date(2015, 05, 01), y: 489 },
{ x: new Date(2015, 06, 01), y: 495 },
{ x: new Date(2015, 07, 01), y: 495 },
{ x: new Date(2015, 08, 01), y: 500 },
{ x: new Date(2015, 09, 01), y: 508 },
{ x: new Date(2015, 10, 01), y: 520 },
{ x: new Date(2015, 11, 01), y: 525 },
{ x: new Date(2016, 00, 01), y: 525 },
{ x: new Date(2016, 01, 01), y: 529 },
{ x: new Date(2016, 02, 01), y: 549 },
{ x: new Date(2016, 03, 01), y: 550 },
{ x: new Date(2016, 04, 01), y: 568 },
{ x: new Date(2016, 05, 01), y: 575 },
{ x: new Date(2016, 06, 01), y: 579 },
{ x: new Date(2016, 07, 01), y: 575 },
{ x: new Date(2016, 08, 01), y: 585 },
{ x: new Date(2016, 09, 01), y: 589 },
{ x: new Date(2016, 10, 01), y: 595 },
{ x: new Date(2016, 11, 01), y: 595 },
{ x: new Date(2017, 00, 01), y: 595 },
{ x: new Date(2017, 01, 01), y: 600 },
{ x: new Date(2017, 02, 01), y: 624 },
{ x: new Date(2017, 03, 01), y: 635 },
{ x: new Date(2017, 04, 01), y: 650 },
{ x: new Date(2017, 05, 01), y: 675 }
]
},
{
type: "line",
axisYType: "secondary",
name: "Los Angeles",
showInLegend: true,
markerSize: 0,
yValueFormatString: "$#,###k",
dataPoints: [
{ x: new Date(2014, 00, 01), y: 529 },
{ x: new Date(2014, 01, 01), y: 540 },
{ x: new Date(2014, 02, 01), y: 539 },
{ x: new Date(2014, 03, 01), y: 565 },
{ x: new Date(2014, 04, 01), y: 575 },
{ x: new Date(2014, 05, 01), y: 579 },
{ x: new Date(2014, 06, 01), y: 589 },
{ x: new Date(2014, 07, 01), y: 579 },
{ x: new Date(2014, 08, 01), y: 579 },
{ x: new Date(2014, 09, 01), y: 579 },
{ x: new Date(2014, 10, 01), y: 569 },
{ x: new Date(2014, 11, 01), y: 525 },
{ x: new Date(2015, 00, 01), y: 535 },
{ x: new Date(2015, 01, 01), y: 575 },
{ x: new Date(2015, 02, 01), y: 599 },
{ x: new Date(2015, 03, 01), y: 619 },
{ x: new Date(2015, 04, 01), y: 639 },
{ x: new Date(2015, 05, 01), y: 648 },
{ x: new Date(2015, 06, 01), y: 640 },
{ x: new Date(2015, 07, 01), y: 645 },
{ x: new Date(2015, 08, 01), y: 648 },
{ x: new Date(2015, 09, 01), y: 649 },
{ x: new Date(2015, 10, 01), y: 649 },
{ x: new Date(2015, 11, 01), y: 649 },
{ x: new Date(2016, 00, 01), y: 650 },
{ x: new Date(2016, 01, 01), y: 665 },
{ x: new Date(2016, 02, 01), y: 675 },
{ x: new Date(2016, 03, 01), y: 695 },
{ x: new Date(2016, 04, 01), y: 690 },
{ x: new Date(2016, 05, 01), y: 699 },
{ x: new Date(2016, 06, 01), y: 699 },
{ x: new Date(2016, 07, 01), y: 699 },
{ x: new Date(2016, 08, 01), y: 699 },
{ x: new Date(2016, 09, 01), y: 699 },
{ x: new Date(2016, 10, 01), y: 709 },
{ x: new Date(2016, 11, 01), y: 699 },
{ x: new Date(2017, 00, 01), y: 700 },
{ x: new Date(2017, 01, 01), y: 700 },
{ x: new Date(2017, 02, 01), y: 724 },
{ x: new Date(2017, 03, 01), y: 739 },
{ x: new Date(2017, 04, 01), y: 749 },
{ x: new Date(2017, 05, 01), y: 740 }
]
}]
});
chart.render();
function toogleDataSeries(e){
if (typeof(e.dataSeries.visible) === "undefined" || e.dataSeries.visible) {
e.dataSeries.visible = false;
} else{
e.dataSeries.visible = true;
}
chart.render();
}
}
You can customize color of each line or change its thickness using lineThickness. You can also enable legends using showInLegend to show what each line in chart represents.