@trifectait,
There is no data for the entire graph for a variable, and so we are getting a flat line at zero.
Do you mean hiding axis line? If so, you can set axisX lineThickness property to 0 to do so.
If this doesn’t fulfill your requirements kindly share JSFiddle with sample data or a pictorial representation of your requirement so that we can understand it better and help you out.
—
Vishwas R
Team CanvasJS