Chapter 4-9: Appx Chart Director API

Designing a Chart

Designing a chart can be as simple as calling two subroutines - one to initialize a new chart specification (.CHART INITIALIZE) and one to render the chart (.CHART RENDER). The following example illustrates the ILF statements needed to initialize and render a default pie chart (/tmp/piechart.png) using a previously defined dataset consisting of seven data values

Also notice the use of SUBR instead of GOSUB to call the chart rendering subroutine. This is a large process and compile times/sizes will be reduced if you call it as a separate process instead of including it in your process with a GOSUB.

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