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KoolChart - Excellent PHP Chart and GraphFullVersion 1.0.0.0 released on 11/29/2012
ChartTypes - PHP Line Chart
Description & Sample code
To add a line series to the chart, you do:
$series = new LineSeries();
$series->Name = "Week 1";
$series->Appearance->BackgroundColor="#2D6B99";
$series->TooltipsAppearance->DataFormatString = "{0}%";
$series->LabelsAppearance->DataFormatString = "{0}%";
$series->LabelsAppearance->Position = "above";
$series->MarkersAppearance->MarkersType = "Square";
$series->ArrayData(array(20,30,15,70,50,40,55));
$chart->PlotArea->AddSeries($series);
