flot chart does not stack multiple series with null at some points in series

Question

I am trying to plot stacked area ( filled line ) with stacking using flot charts my data is is like

series 1: [0,5],[1,3],[2,2],[3,2],[4,2]

series 2: [0,5],[1,2],[2,null],[3,1],[4,2]

series 3: [0,5],[1,3],[2,2],[3,5],[4,2]

as in above case at point 2, flot is not plotting series 3 : [2,2] I see chart plotting 3 series in stack, but at point 2 its only one value ( series 1 with value 2 )

here is jsfiddle example http://jsfiddle.net/judaq/7/

Answer 1

Trying using a 0 instead of null.

Edit

var series = [{
    data: [
        [0,5],[1,3],[2,2],[3,2],[4,9]
    ],
    label: "Series 1"
},
{
    data: [[0,5],[1,3],[2,2],[3,0],[4,9]
          ], 
    label: "Series 2"
}, {
    data: [
        [0,5],[1,3],[2,2],[3,5],[4,9]
    ],
    label: "Series 3"
}];

http://jsfiddle.net/KieranDotCo/judaq/

Answer 2

This is a known issue with the stack plugin in flot.

See the github issue #740 .