startValue : Number

Sets the starting value of custom scale break.

var  chart =  new  CanvasJS.Chart("chartContainer",
{
 .
 .
 axisX: {
    scaleBreaks: {
	customBreaks: [{
	     startValue: "200",
	     endValue: "4500",
	     .
	     .
       }]
    },
  .
  .
 },
 .
 . 
});
chart.render();