Empty Points in EJ 1 Angular Chart
8 Jun 2017 / 3 minutes to read
The Data points that uses the null or undefined as value are considered as empty points. Empty data points are ignored and not plotted in the Chart. When the data is provided by using the points
property, you can set the isEmpty to true to specify that the particular point is an empty point.
<ej-chart id="chartcontainer">
<e-seriescollection>
<e-series type="spline">
<e-points>
<e-point x="0" [y]="210"></e-point>
<e-point x="1" [y]="null"></e-point>
<e-point x="2" [y]="150"></e-point>
<e-point x="3" [y]="180" [isEmpty]="true"></e-point>
<e-point x="4" [y]="170"></e-point>
<e-point x="5" [y]="200"></e-point>
<e-point x="6" [y]="140" [isEmpty]="true"></e-point>
<e-point x="7" [y]="120"></e-point>
</e-points>
</e-series>
</e-seriescollection>
</ej-chart>
EmptyPointSettings
You can customize the empty points visibility and change its displayMode
(gap, zero and average) using emptyPointSettings
option.
<ej-chart id="chartcontainer">
<e-seriescollection>
<e-series [emptyPointSettings.visible]="true" emptyPointSettings.displayMode="average">
</e-series>
</e-seriescollection>
</ej-chart>
If the visible
property of emptyPointSettings
is false, then the empty points has been dropped and chart will be rendered without empty points.
Customizing Styles
Empty points color and border can be customized using style
property of emptyPointSettings
.
this.emptyStyle = {
color: "#ffa000",
border: {
color: "gray",
width: 2
}
};
<ej-chart id="chartcontainer">
<e-seriescollection>
<e-series [emptyPointSettings.visible]="true" [emptyPointSettings.style]="emptyStyle">
</e-series>
</e-seriescollection>
</ej-chart>
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