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Spline Charts
Spline charts are a specialized form of line charts that display smooth curves through the different data points.
In this section, you will be introduced to the:
-
Basics of spline charts
-
Types of spline charts
Basics of Spline Charts
Spline charts integrate all the characteristics of a conventional line chart except for the fact that unlike line charts, which connect data points with straight lines, spline charts draw a fitted curved line to join the data points.
Spline charts can be used for plotting data that requires the usage of curve-fitting e.g. an impulse-response chart, a product life cycle chart, etc. It is also significantly used in designing Pareto charts.
Types
FusionCharts Suite XT includes four types of spline charts:
-
Single-series spline 2D chart
-
Multi-series spline 2D chart
-
Single-series spline area 2D chart
-
Multi-series spline area 2D chart
Single-series Spline 2D Chart
A single-series spline 2D chart draws a single fitted curve through the data points.
A simple single-series spline 2D chart looks like this:
FusionCharts will load here..
{
"chart": {
"caption": "Total footfall in Bakersfield Central",
"subCaption": "Last week",
"xAxisName": "Day",
"yAxisName": "No. of Footfalls",
"lineThickness": "2",
"paletteColors": "#008ee4,#6baa01",
"baseFontColor": "#333333",
"baseFont": "Helvetica Neue,Arial",
"captionFontSize": "14",
"subcaptionFontSize": "14",
"subcaptionFontBold": "0",
"showBorder": "0",
"showValues": "0",
"bgColor": "#ffffff",
"showShadow": "0",
"canvasBgColor": "#ffffff",
"canvasBorderAlpha": "0",
"divlineAlpha": "100",
"divlineColor": "#999999",
"divlineThickness": "1",
"divLineIsDashed": "1",
"divLineDashLen": "1",
"divLineGapLen": "1",
"showXAxisLine": "1",
"xAxisLineThickness": "1",
"xAxisLineColor": "#999999",
"showAlternateHGridColor": "0"
},
"data": [
{
"label": "Mon",
"value": "15123"
},
{
"label": "Tue",
"value": "14233"
},
{
"label": "Wed",
"value": "25507"
},
{
"vline": "true",
"lineposition": "0",
"color": "#6baa01",
"labelHAlign": "left",
"label": "National holiday"
},
{
"label": "Thu",
"value": "9110"
},
{
"label": "Fri",
"value": "15529"
},
{
"label": "Sat",
"value": "20803"
},
{
"label": "Sun",
"value": "19202"
}
]
}<html>
<head>
<title>My first chart using FusionCharts Suite XT</title>
<script type="text/javascript" src="http://static.fusioncharts.com/code/latest/fusioncharts.js"></script>
<script type="text/javascript" src="http://static.fusioncharts.com/code/latest/themes/fusioncharts.theme.fint.js?cacheBust=56"></script>
<script type="text/javascript">
FusionCharts.ready(function(){
var fusioncharts = new FusionCharts({
"type": "spline",
"dataFormat": "json",
"renderAt": "chart-container",
"width": "500",
"height": "300",
"dataSource": {
"chart": {
"caption": "Total footfall in Bakersfield Central",
"subCaption": "Last week",
"xAxisName": "Day",
"yAxisName": "No. of Footfalls",
//Cosmetics
"lineThickness": "2",
"paletteColors": "#008ee4,#6baa01",
"baseFontColor": "#333333",
"baseFont": "Helvetica Neue,Arial",
"captionFontSize": "14",
"subcaptionFontSize": "14",
"subcaptionFontBold": "0",
"showBorder": "0",
"showValues": "0",
"bgColor": "#ffffff",
"showShadow": "0",
"canvasBgColor": "#ffffff",
"canvasBorderAlpha": "0",
"divlineAlpha": "100",
"divlineColor": "#999999",
"divlineThickness": "1",
"divLineIsDashed": "1",
"divLineDashLen": "1",
"divLineGapLen": "1",
"showXAxisLine": "1",
"xAxisLineThickness": "1",
"xAxisLineColor": "#999999",
"showAlternateHGridColor": "0"
},
"data": [{
"label": "Mon",
"value": "15123"
}, {
"label": "Tue",
"value": "14233"
}, {
"label": "Wed",
"value": "25507"
}, {
"vline": "true",
"lineposition": "0",
"color": "#6baa01",
"labelHAlign": "left",
"label": "National holiday"
}, {
"label": "Thu",
"value": "9110"
}, {
"label": "Fri",
"value": "15529"
}, {
"label": "Sat",
"value": "20803"
}, {
"label": "Sun",
"value": "19202"
}]
}
}
);
fusioncharts.render();
});
</script>
</head>
<body>
<div id="chart-container">FusionCharts XT will load here!</div>
</body>
</html>Multi-series Spline 2D Chart
A simple multi-series spline 2D chart looks like this:
FusionCharts will load here..
{
"chart": {
"caption": "Number of visitors last week",
"subCaption": "Bakersfield Central vs Los Angeles Topanga",
"captionFontSize": "14",
"subcaptionFontSize": "14",
"baseFontColor": "#333333",
"baseFont": "Helvetica Neue,Arial",
"subcaptionFontBold": "0",
"xAxisName": "Day",
"yAxisName": "No. of Visitor",
"showValues": "0",
"paletteColors": "#0075c2,#1aaf5d",
"bgColor": "#ffffff",
"showBorder": "0",
"showShadow": "0",
"showAlternateHGridColor": "0",
"showCanvasBorder": "0",
"showXAxisLine": "1",
"xAxisLineThickness": "1",
"xAxisLineColor": "#999999",
"canvasBgColor": "#ffffff",
"legendBorderAlpha": "0",
"legendShadow": "0",
"divlineAlpha": "100",
"divlineColor": "#999999",
"divlineThickness": "1",
"divLineIsDashed": "1",
"divLineDashLen": "1",
"divLineGapLen": "1"
},
"categories": [
{
"category": [
{
"label": "Mon"
},
{
"label": "Tue"
},
{
"label": "Wed"
},
{
"vline": "true",
"lineposition": "0",
"color": "#6baa01",
"labelHAlign": "right",
"labelPosition": "0",
"label": "National holiday"
},
{
"label": "Thu"
},
{
"label": "Fri"
},
{
"label": "Sat"
},
{
"label": "Sun"
}
]
}
],
"dataset": [
{
"seriesname": "Bakersfield Central",
"data": [
{
"value": "15123"
},
{
"value": "14233"
},
{
"value": "25507"
},
{
"value": "9110"
},
{
"value": "15529"
},
{
"value": "20803"
},
{
"value": "19202"
}
]
},
{
"seriesname": "Los Angeles Topanga",
"data": [
{
"value": "13400"
},
{
"value": "12800"
},
{
"value": "22800"
},
{
"value": "12400"
},
{
"value": "15800"
},
{
"value": "19800"
},
{
"value": "21800"
}
]
}
]
}<html>
<head>
<title>My first chart using FusionCharts Suite XT</title>
<script type="text/javascript" src="http://static.fusioncharts.com/code/latest/fusioncharts.js"></script>
<script type="text/javascript" src="http://static.fusioncharts.com/code/latest/themes/fusioncharts.theme.fint.js?cacheBust=56"></script>
<script type="text/javascript">
FusionCharts.ready(function(){
var fusioncharts = new FusionCharts({
type: 'msspline',
renderAt: 'chart-container',
width: '500',
height: '400',
dataFormat: 'json',
dataSource: {
"chart": {
"caption": "Number of visitors last week",
"subCaption": "Bakersfield Central vs Los Angeles Topanga",
"captionFontSize": "14",
"subcaptionFontSize": "14",
"baseFontColor": "#333333",
"baseFont": "Helvetica Neue,Arial",
"subcaptionFontBold": "0",
"xAxisName": "Day",
"yAxisName": "No. of Visitor",
"showValues": "0",
"paletteColors": "#0075c2,#1aaf5d",
"bgColor": "#ffffff",
"showBorder": "0",
"showShadow": "0",
"showAlternateHGridColor": "0",
"showCanvasBorder": "0",
"showXAxisLine": "1",
"xAxisLineThickness": "1",
"xAxisLineColor": "#999999",
"canvasBgColor": "#ffffff",
"legendBorderAlpha": "0",
"legendShadow": "0",
"divlineAlpha": "100",
"divlineColor": "#999999",
"divlineThickness": "1",
"divLineIsDashed": "1",
"divLineDashLen": "1",
"divLineGapLen": "1"
},
"categories": [{
"category": [{
"label": "Mon"
}, {
"label": "Tue"
}, {
"label": "Wed"
}, {
"vline": "true",
"lineposition": "0",
"color": "#6baa01",
"labelHAlign": "right",
"labelPosition": "0",
"label": "National holiday"
}, {
"label": "Thu"
}, {
"label": "Fri"
}, {
"label": "Sat"
}, {
"label": "Sun"
}]
}],
"dataset": [{
"seriesname": "Bakersfield Central",
"data": [{
"value": "15123"
}, {
"value": "14233"
}, {
"value": "25507"
}, {
"value": "9110"
}, {
"value": "15529"
}, {
"value": "20803"
}, {
"value": "19202"
}]
}, {
"seriesname": "Los Angeles Topanga",
"data": [{
"value": "13400"
}, {
"value": "12800"
}, {
"value": "22800"
}, {
"value": "12400"
}, {
"value": "15800"
}, {
"value": "19800"
}, {
"value": "21800"
}]
}]
}
}
);
fusioncharts.render();
});
</script>
</head>
<body>
<div id="chart-container">FusionCharts XT will load here!</div>
</body>
</html>To render a multi-series spline chart:
-
Set the
typeattribute tomsspline. -
Use the
seriesnameattribute and thedataobject, which belong to thedatasetobject, to specify multiple datasets.
Multi-series Spline Area 2D Chart
A multi-series spline area 2D chart is nothing but a conventional area with a smoothened curve drawn through the data points in the series. It allows you to plot data for multiple data sets.
A simple multi-series spline area 2D chart looks like this:
FusionCharts will load here..
{
"chart": {
"caption": "Number of Footfalls Last Week",
"subCaption": "Garden Groove harbour vs Crompton-Rancho Dom",
"xAxisName": "Day",
"yAxisName": "No. of Footfalls",
"captionFontSize": "14",
"subcaptionFontSize": "14",
"baseFontColor": "#333333",
"baseFont": "Helvetica Neue,Arial",
"subcaptionFontBold": "0",
"paletteColors": "#6baa01,#008ee4",
"usePlotGradientColor": "0",
"bgColor": "#ffffff",
"showBorder": "0",
"showPlotBorder": "0",
"showValues": "0",
"showShadow": "0",
"showAlternateHGridColor": "0",
"showCanvasBorder": "0",
"showXAxisLine": "1",
"xAxisLineThickness": "1",
"xAxisLineColor": "#999999",
"canvasBgColor": "#ffffff",
"divlineAlpha": "100",
"divlineColor": "#999999",
"divlineThickness": "1",
"divLineIsDashed": "1",
"divLineDashLen": "1",
"divLineGapLen": "1",
"legendBorderAlpha": "0",
"legendShadow": "0",
"toolTipColor": "#ffffff",
"toolTipBorderThickness": "0",
"toolTipBgColor": "#000000",
"toolTipBgAlpha": "80",
"toolTipBorderRadius": "2",
"toolTipPadding": "5"
},
"categories": [
{
"category": [
{
"label": "Mon"
},
{
"label": "Tue"
},
{
"label": "Wed"
},
{
"vline": "true",
"lineposition": "0",
"color": "#6baa01",
"labelHAlign": "right",
"labelPosition": "0",
"label": "National holiday"
},
{
"label": "Thu"
},
{
"label": "Fri"
},
{
"label": "Sat"
},
{
"label": "Sun"
}
]
}
],
"dataset": [
{
"seriesname": "Garden Groove harbour",
"data": [
{
"value": "15123"
},
{
"value": "14233"
},
{
"value": "21507"
},
{
"value": "9110"
},
{
"value": "14829"
},
{
"value": "17503"
},
{
"value": "20202"
}
]
},
{
"seriesname": "Crompton-Rancho Dom",
"data": [
{
"value": "11400"
},
{
"value": "12800"
},
{
"value": "17800"
},
{
"value": "10400"
},
{
"value": "11800"
},
{
"value": "13100"
},
{
"value": "20800"
}
]
}
]
}<html>
<head>
<title>My first chart using FusionCharts Suite XT</title>
<script type="text/javascript" src="http://static.fusioncharts.com/code/latest/fusioncharts.js"></script>
<script type="text/javascript" src="http://static.fusioncharts.com/code/latest/themes/fusioncharts.theme.fint.js?cacheBust=56"></script>
<script type="text/javascript">
FusionCharts.ready(function(){
var fusioncharts = new FusionCharts({
type: 'mssplinearea',
renderAt: 'chart-container',
width: '500',
height: '350',
dataFormat: 'json',
dataSource: {
"chart": {
"caption": "Number of Footfalls Last Week",
"subCaption": "Garden Groove harbour vs Crompton-Rancho Dom",
"xAxisName": "Day",
"yAxisName": "No. of Footfalls",
"captionFontSize": "14",
"subcaptionFontSize": "14",
"baseFontColor": "#333333",
"baseFont": "Helvetica Neue,Arial",
"subcaptionFontBold": "0",
"paletteColors": "#6baa01,#008ee4",
"usePlotGradientColor": "0",
"bgColor": "#ffffff",
"showBorder": "0",
"showPlotBorder": "0",
"showValues": "0",
"showShadow": "0",
"showAlternateHGridColor": "0",
"showCanvasBorder": "0",
"showXAxisLine": "1",
"xAxisLineThickness": "1",
"xAxisLineColor": "#999999",
"canvasBgColor": "#ffffff",
"divlineAlpha": "100",
"divlineColor": "#999999",
"divlineThickness": "1",
"divLineIsDashed": "1",
"divLineDashLen": "1",
"divLineGapLen": "1",
"legendBorderAlpha": "0",
"legendShadow": "0",
"toolTipColor": "#ffffff",
"toolTipBorderThickness": "0",
"toolTipBgColor": "#000000",
"toolTipBgAlpha": "80",
"toolTipBorderRadius": "2",
"toolTipPadding": "5"
},
"categories": [{
"category": [{
"label": "Mon"
}, {
"label": "Tue"
}, {
"label": "Wed"
}, {
"vline": "true",
"lineposition": "0",
"color": "#6baa01",
"labelHAlign": "right",
"labelPosition": "0",
"label": "National holiday"
}, {
"label": "Thu"
}, {
"label": "Fri"
}, {
"label": "Sat"
}, {
"label": "Sun"
}]
}],
"dataset": [{
"seriesname": "Garden Groove harbour",
"data": [{
"value": "15123"
}, {
"value": "14233"
}, {
"value": "21507"
}, {
"value": "9110"
}, {
"value": "14829"
}, {
"value": "17503"
}, {
"value": "20202"
}]
}, {
"seriesname": "Crompton-Rancho Dom",
"data": [{
"value": "11400"
}, {
"value": "12800"
}, {
"value": "17800"
}, {
"value": "10400"
}, {
"value": "11800"
}, {
"value": "13100"
}, {
"value": "20800"
}]
}]
}
}
);
fusioncharts.render();
});
</script>
</head>
<body>
<div id="chart-container">FusionCharts XT will load here!</div>
</body>
</html>Single-series Spline Area 2D Chart
A simple single-series spline area area 2D chart looks like this:
FusionCharts will load here..
{
"chart": {
"caption": "Total sales of iPhone",
"subCaption": "Last month",
"xAxisName": "Week",
"yAxisName": "Units sold",
"captionFontSize": "14",
"subcaptionFontSize": "14",
"baseFontColor": "#333333",
"baseFont": "Helvetica Neue,Arial",
"subcaptionFontBold": "0",
"paletteColors": "#0075c2",
"usePlotGradientColor": "0",
"bgColor": "#ffffff",
"showBorder": "0",
"showValues": "0",
"showShadow": "0",
"showAlternateHGridColor": "0",
"showCanvasBorder": "0",
"showXAxisLine": "1",
"xAxisLineThickness": "1",
"xAxisLineColor": "#999999",
"canvasBgColor": "#ffffff",
"divlineAlpha": "100",
"divlineColor": "#999999",
"divlineThickness": "1",
"divLineIsDashed": "1",
"divLineDashLen": "1",
"divLineGapLen": "1"
},
"data": [
{
"label": "Week 1",
"value": "530"
},
{
"label": "Week 2",
"value": "660"
},
{
"label": "Week 3",
"value": "420"
},
{
"label": "Week 4",
"value": "580"
},
{
"label": "Week 5",
"value": "560"
}
]
}<html>
<head>
<title>My first chart using FusionCharts Suite XT</title>
<script type="text/javascript" src="http://static.fusioncharts.com/code/latest/fusioncharts.js"></script>
<script type="text/javascript" src="http://static.fusioncharts.com/code/latest/themes/fusioncharts.theme.fint.js?cacheBust=56"></script>
<script type="text/javascript">
FusionCharts.ready(function(){
var fusioncharts = new FusionCharts({
type: 'splinearea',
renderAt: 'chart-container',
width: '500',
height: '300',
dataFormat: 'json',
dataSource: {
"chart": {
"caption": "Total sales of iPhone",
"subCaption": "Last month",
"xAxisName": "Week",
"yAxisName": "Units sold",
"captionFontSize": "14",
"subcaptionFontSize": "14",
"baseFontColor": "#333333",
"baseFont": "Helvetica Neue,Arial",
"subcaptionFontBold": "0",
"paletteColors": "#0075c2",
"usePlotGradientColor": "0",
"bgColor": "#ffffff",
"showBorder": "0",
"showValues": "0",
"showShadow": "0",
"showAlternateHGridColor": "0",
"showCanvasBorder": "0",
"showXAxisLine": "1",
"xAxisLineThickness": "1",
"xAxisLineColor": "#999999",
"canvasBgColor": "#ffffff",
"divlineAlpha": "100",
"divlineColor": "#999999",
"divlineThickness": "1",
"divLineIsDashed": "1",
"divLineDashLen": "1",
"divLineGapLen": "1"
},
"data": [{
"label": "Week 1",
"value": "530"
}, {
"label": "Week 2",
"value": "660"
}, {
"label": "Week 3",
"value": "420"
}, {
"label": "Week 4",
"value": "580"
}, {
"label": "Week 5",
"value": "560"
}]
}
}
);
fusioncharts.render();
});
</script>
</head>
<body>
<div id="chart-container">FusionCharts XT will load here!</div>
</body>
</html>To render a single-series spline chart:
- Set the
typeattribute tosplinearea.
Spline and spline area charts do not support joining of empty data points in the chart. That means, if your chart does not contain data at a particular point, the data points cannot be connected to each other and will appear as a broken dataset.