[Solved]-In highchart how to plot the line in 3d container-Highcharts

plotting lines is just line plotting points, originally shown here

to change that plot from points to lines, first change the colorbypoint to false. then add linewidth: 1. that will get you lines. to remove the vertex markers, add to plotoptions.scatter:

marker: {
    enabled: false // true removes vertex markers
}

finished example here