Vertical line charts are not supported natively in RGraph however they can be achieved using the Scatter chart. With this chart you can specify the X and Y coordinates and a connecting line can be shown as in the example.
Below is the code that is necessary to achieve the vertical line chart.
<script src="RGraph.common.core.js"></script> <script src="RGraph.scatter.js"></script>Put this where you want the chart to show up:
<canvas id="cvs" width="400" height="550" style="float: right"> [No canvas support] </canvas>This is the code that generates the chart: