line color and function(obj)


Hi, i can’t use function(obj) in line color logic

i have series and i can’t use function(obj) in the color attribute for line:
it’s - undefined value

view: “line”,
line: {
color: function(obj){
var m = obj.student_id;
if (m==1) {
return “#FFFF00”;
} else {
return “#FF0000”;
width: 3
tooltip: {
template: “#student_id#”


Could you provide an image with expected result?
I will provide you correct color settings based on the picture