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ExtJs 4 extension for Highcharts: passing null values

In Highcharts, to distinguish whether there is a data point of zero value or no data at all is by passing null values. There are two ways to pass null values from server side JSON to the ExtJs store. First is to literally having null values assigned in the JSON data or leave the field value in the JSON data undefined, e,g. Read more »


How to make a projection chart in Highcharts

Suppose we have a time series which contains current and future data, we can plot a projection chart like the following screenshot:

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