d3.js - nvd3 insert a break in a line chart -

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i using nvd3 linechart , looking way insert break in plotted line.

if have dataset 10 points need chart draw line connecting first 5 points , last 5 points not connecting points 5 , 6 ie

1-2-3-4-5 6-7-8-9-10

i have tried setting both chart.defined , line.defined = false point 5 results in no line connecting points 4, 5 , 6 ie

1-2-3-4 5 6-7-8-9-10

unfortunately have got standalone snippet of code involved in rendering chart - here 2 functions resulted in point 5 being rendered stand alone point:

chart = nv.models.linechart(); chart.defined(function (d,i) {     if (i == 4){             return false;         }else{             return true;         }     } }    lines.defined(function(d,i){     if (i==4 ){         return false     }else{return true} })


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