Google可视化折线图 - 多行

Question

I have a line chart, h-axis is date, v-axis is double. I need to display two lines:

lineA: [
    [2016-1-1 00:00, 1.1]
    [2016-2-1 00:00, 1.1]
    [2016-3-1 00:00, 1.1]
]
lineB: [
    [2016-1-1 00:00, 2.1]
    [2016-2-1 08:00, 2.1]
    [2016-3-1 00:00, 2.1]
]

To display the data on the chart, I need to combine these two lines and pass the result to arrayToDataTable.

combine: [
    [2016-1-1 00:00, 1.1, 2.1],
    [2016-2-1 00:00, 1.1, null],
    [2016-2-1 08:00, null, 2.1],
    [2016-3-1 00:00, 1.1, 2.1],
]

As a result of the above, I am getting gaps on the lines. How can I solve this issue? Is it possible to pass two individual sets, one for each line? All the examples I have found require them to be merged as the combine table.

I need to keep the nulls when provided as part of line1 and line2 table

Answer 1

use the following option to fill in gaps created by null values

interpolateNulls: true

---

EDIT

see following working snippet...

 google.charts.load('current', { callback: function () { var data = google.visualization.arrayToDataTable([ [new Date(2016, 0, 1), 1.1, 2.1], [new Date(2016, 1, 1), 1.1, null], [new Date(2016, 1, 1, 8), null, 2.1], [new Date(2016, 2, 1), 1.1, 2.1] ], true); var options = { interpolateNulls: true }; var container = document.body.appendChild(document.createElement('div')); var chart = new google.visualization.LineChart(container); chart.draw(data, options); }, packages: ['corechart'] }); 

 <script src="https://www.gstatic.com/charts/loader.js"></script> 

Answer 2

 google.charts.load('current', { callback: function () { var data = google.visualization.arrayToDataTable([ [new Date(2016, 0, 1), 1.1, 2.1], [new Date(2016, 1, 1), 1.1, null], [new Date(2016, 1, 1, 8), null, 2.1], [new Date(2016, 2, 1), 1.1, 2.1] ], true); var options = { interpolateNulls: true }; var container = document.body.appendChild(document.createElement('div')); var chart = new google.visualization.LineChart(container); chart.draw(data, options); }, packages: ['corechart'] }); 

 <script src="https://www.gstatic.com/charts/loader.js"></script>