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Highcharts - how to prevent xAxis redraw when using addSeries?

I have a highstocks scatter chart and after the series data is initialised I add a line of best fit (once I've calculated the endpoints) using addSeries.
The problem I am having is that when I add my new series the xAxis datetime labels all disappear (they are originally drawn correctly). It seems like because the new series only has two points, the chart redraws the xAxis to cater for the new series and draws it with only a single datetime label.
Looks very similar to this issue which was never solved
How can I avoid this happening?
I can't share my actual code as it's embedded in a Java widget on a proprietary framework but this Fiddle shows the same behaviour
Highcharts.chart('container', {
chart: {
type: 'scatter',
zoomType: 'x'
},
title: {
text: 'Random data'
},
xAxis: {
title: {
enabled: true,
text: 'Height (cm)'
},
type: 'datetime' //,
// startOnTick: true,
// endOnTick: true,
// showLastLabel: true
},
exporting: {
buttons: {
customButton: {
text: 'Add Series',
onclick: function() {
var newRegressionLineSeries = {
type: 'line',
name: 'Line series',
data: [
[Date.UTC(2015, 2, 26), 0.8],
[Date.UTC(2015, 6, 28), 0.7]
],
marker: {
enabled: false
},
states: {
hover: {
lineWidth: 0
}
},
enableMouseTracking: false
};
this.addSeries(newRegressionLineSeries);
}
}
}
},
plotOptions: {
scatter: {
marker: {
radius: 5,
states: {
hover: {
enabled: true,
lineColor: 'rgb(100,100,100)'
}
}
},
states: {
hover: {
marker: {
enabled: false
}
}
},
tooltip: {
headerFormat: '<b>{series.name}</b><br>',
pointFormat: '{point.x} cm, {point.y} kg'
}
}
},
series: [{
name: 'Data',
color: 'rgba(223, 83, 83, .5)',
data: [
[Date.UTC(2015, 2, 26), 0.9188],
[Date.UTC(2015, 2, 27), 0.9184],
[Date.UTC(2015, 2, 29), 0.9188],
[Date.UTC(2015, 2, 30), 0.9231],
[Date.UTC(2015, 2, 31), 0.9319],
[Date.UTC(2015, 3, 1), 0.9291],
[Date.UTC(2015, 3, 2), 0.9188],
[Date.UTC(2015, 3, 3), 0.9109],
[Date.UTC(2015, 3, 5), 0.9091],
[Date.UTC(2015, 3, 6), 0.9154],
[Date.UTC(2015, 3, 7), 0.9246],
[Date.UTC(2015, 3, 8), 0.9276],
[Date.UTC(2015, 3, 9), 0.9382],
[Date.UTC(2015, 3, 10), 0.9431],
[Date.UTC(2015, 3, 12), 0.9426],
[Date.UTC(2015, 3, 13), 0.9463],
[Date.UTC(2015, 3, 14), 0.9386],
[Date.UTC(2015, 3, 15), 0.9357],
[Date.UTC(2015, 3, 16), 0.9293],
[Date.UTC(2015, 3, 17), 0.9254],
[Date.UTC(2015, 3, 19), 0.9251],
[Date.UTC(2015, 3, 20), 0.9312],
[Date.UTC(2015, 3, 21), 0.9315],
[Date.UTC(2015, 3, 22), 0.9323],
[Date.UTC(2015, 3, 23), 0.9236],
[Date.UTC(2015, 3, 24), 0.9196],
[Date.UTC(2015, 3, 26), 0.9201],
[Date.UTC(2015, 3, 27), 0.9184],
[Date.UTC(2015, 3, 28), 0.9106],
[Date.UTC(2015, 3, 29), 0.8983],
[Date.UTC(2015, 3, 30), 0.8909],
[Date.UTC(2015, 4, 1), 0.8928],
[Date.UTC(2015, 4, 3), 0.8941],
[Date.UTC(2015, 4, 4), 0.8972],
[Date.UTC(2015, 4, 5), 0.8940],
[Date.UTC(2015, 4, 6), 0.8808],
[Date.UTC(2015, 4, 7), 0.8876],
[Date.UTC(2015, 4, 8), 0.8925],
[Date.UTC(2015, 4, 10), 0.8934],
[Date.UTC(2015, 4, 11), 0.8964],
[Date.UTC(2015, 4, 12), 0.8917],
[Date.UTC(2015, 4, 13), 0.8805],
[Date.UTC(2015, 4, 14), 0.8764],
[Date.UTC(2015, 4, 15), 0.8732],
[Date.UTC(2015, 4, 17), 0.8737],
[Date.UTC(2015, 4, 18), 0.8838],
[Date.UTC(2015, 4, 19), 0.8969],
[Date.UTC(2015, 4, 20), 0.9014],
[Date.UTC(2015, 4, 21), 0.8999],
[Date.UTC(2015, 4, 22), 0.9076],
[Date.UTC(2015, 4, 24), 0.9098],
[Date.UTC(2015, 4, 25), 0.9110],
[Date.UTC(2015, 4, 26), 0.9196],
[Date.UTC(2015, 4, 27), 0.9170],
[Date.UTC(2015, 4, 28), 0.9133],
[Date.UTC(2015, 4, 29), 0.9101],
[Date.UTC(2015, 4, 31), 0.9126],
[Date.UTC(2015, 5, 1), 0.9151],
[Date.UTC(2015, 5, 2), 0.8965],
[Date.UTC(2015, 5, 3), 0.8871],
[Date.UTC(2015, 5, 4), 0.8898],
[Date.UTC(2015, 5, 5), 0.8999],
[Date.UTC(2015, 5, 7), 0.9004],
[Date.UTC(2015, 5, 8), 0.8857],
[Date.UTC(2015, 5, 9), 0.8862],
[Date.UTC(2015, 5, 10), 0.8829],
[Date.UTC(2015, 5, 11), 0.8882],
[Date.UTC(2015, 5, 12), 0.8873],
[Date.UTC(2015, 5, 14), 0.8913],
[Date.UTC(2015, 5, 15), 0.8862],
[Date.UTC(2015, 5, 16), 0.8891],
[Date.UTC(2015, 5, 17), 0.8821],
[Date.UTC(2015, 5, 18), 0.8802],
[Date.UTC(2015, 5, 19), 0.8808],
[Date.UTC(2015, 5, 21), 0.8794],
[Date.UTC(2015, 5, 22), 0.8818],
[Date.UTC(2015, 5, 23), 0.8952],
[Date.UTC(2015, 5, 24), 0.8924],
[Date.UTC(2015, 5, 25), 0.8925],
[Date.UTC(2015, 5, 26), 0.8955],
[Date.UTC(2015, 5, 28), 0.9113],
[Date.UTC(2015, 5, 29), 0.8900],
[Date.UTC(2015, 5, 30), 0.8950],
[Date.UTC(2015, 6, 1), 0.8950],
[Date.UTC(2015, 6, 2), 0.8750],
[Date.UTC(2015, 6, 3), 0.8650],
[Date.UTC(2015, 6, 4), 0.8550],
[Date.UTC(2015, 6, 5), 0.8150],
[Date.UTC(2015, 6, 6), 0.8100],
[Date.UTC(2015, 6, 7), 0.8070],
[Date.UTC(2015, 6, 8), 0.8050],
[Date.UTC(2015, 6, 9), 0.7990],
[Date.UTC(2015, 6, 10), 0.7900],
[Date.UTC(2015, 6, 11), 0.7850],
[Date.UTC(2015, 6, 12), 0.7800],
[Date.UTC(2015, 6, 13), 0.7750],
[Date.UTC(2015, 6, 14), 0.7700],
[Date.UTC(2015, 6, 15), 0.7650],
[Date.UTC(2015, 6, 16), 0.7600],
[Date.UTC(2015, 6, 17), 0.7550],
[Date.UTC(2015, 6, 18), 0.7500],
[Date.UTC(2015, 6, 19), 0.7450],
[Date.UTC(2015, 6, 20), 0.7400],
[Date.UTC(2015, 6, 21), 0.7350],
[Date.UTC(2015, 6, 22), 0.7250],
[Date.UTC(2015, 6, 23), 0.7150],
[Date.UTC(2015, 6, 24), 0.7050],
[Date.UTC(2015, 6, 25), 0.6900],
[Date.UTC(2015, 6, 26), 0.6750],
[Date.UTC(2015, 6, 27), 0.6600],
[Date.UTC(2015, 6, 28), 0.6300],
]
}]
});

An easy workaround would be to create a new axis and put the lines with insufficient points on that axis.
I updated the fiddle you provided to achieve this in the following way:
Add new xAxis:
xAxis: [{
id: '0',
title: {
enabled: true,
text: 'Height (cm)'
},
type: 'datetime'
},{
id: '1', //new axis ID
type: 'datetime',
visible: false,
linkedTo: '0'
}],
New lines are added to the new xAxis:
var newRegressionLineSeries = {
xAxis: '1', //Added this
type: 'line',
...
}
Working example: https://jsfiddle.net/xs9toj13/9/

How to correctly use datetime data on the continuous axis of a Google Chart?

So as seen in the code snippet below, I'm just trying to create a chart/control combination dashboard via Google Charts and I'm having some difficulties with datetime fields, despite following the reference material on that.
My areas of confusion are as follows:
1. Why do the dates shown on the chart appear to be off by one month? I've entered dates for August & September, yet September & October are showing up on the chart.
2. Why does the chart displayed for the ChartRangeFilter appear to jump back to older dates (around the October 2 mark)?
google.charts.load('current', {
packages: ['corechart', 'controls']
});
google.charts.setOnLoadCallback(drawDashboard);
function drawDashboard() {
var data = google.visualization.arrayToDataTable([
[{
"type": "datetime",
"label": "date"
}, {
"type": "number",
"label": "presence"
}],
["Date(2017, 08, 29, 12, 17, 25)", 1],
["Date(2017, 08, 29, 15, 06, 39)", 0],
["Date(2017, 08, 29, 17, 28, 27)", 1],
["Date(2017, 08, 30, 09, 14, 33)", 0],
["Date(2017, 08, 30, 13, 17, 28)", 1],
["Date(2017, 08, 30, 14, 03, 52)", 0],
["Date(2017, 08, 30, 17, 31, 12)", 1],
["Date(2017, 08, 30, 22, 14, 45)", 0],
["Date(2017, 08, 30, 22, 15, 48)", 1],
["Date(2017, 08, 31, 08, 41, 30)", 0],
["Date(2017, 08, 31, 13, 22, 06)", 1],
["Date(2017, 08, 31, 13, 33, 33)", 0],
["Date(2017, 08, 31, 15, 23, 41)", 1],
["Date(2017, 08, 31, 15, 48, 11)", 0],
["Date(2017, 08, 31, 22, 15, 45)", 1],
["Date(2017, 09, 01, 09, 18, 40)", 0],
["Date(2017, 09, 01, 19, 29, 50)", 1],
["Date(2017, 09, 02, 11, 24, 07)", 0],
["Date(2017, 09, 02, 14, 13, 04)", 1],
["Date(2017, 09, 03, 09, 48, 48)", 0],
["Date(2017, 09, 03, 13, 27, 42)", 1],
["Date(2017, 09, 03, 13, 51, 46)", 0],
["Date(2017, 09, 03, 15, 44, 59)", 1],
["Date(2017, 09, 04, 10, 02, 20)", 0]
]);
var dashboard = new google.visualization.Dashboard(document.getElementById('dashboard'));
var chart_options = {
"legend": { "position": "none" },
"vAxis": {
"ticks": [{
"f": "Not Present",
"v": 0
}, {
"f": "Present",
"v": 1
}],
"maxValue": 1,
"minValue": 0
},
"title": "Chart"
};
var chart = new google.visualization.ChartWrapper({
'chartType': 'SteppedAreaChart',
'containerId': 'chart',
'options': chart_options
});
var control_options = {
"filterColumnLabel": "date"
};
var control = new google.visualization.ControlWrapper({
'controlType': 'ChartRangeFilter',
'containerId': 'control',
'options': control_options,
});
dashboard.bind(control, chart);
dashboard.draw(data);
}
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="dashboard">
<div id="chart" style="width: 100%; height: 100%"></div>
<div id="control" style="width: 100%; height: 100%"></div>
</div>

Highcharts series rendering problems

I'm working with Highcharts and Highstock and my chart is working weird; it shows vertical lines between markers.
As you can see, Vertical lines appears and they shouldn't.

Your data is filled with duplicate x values, as in this snippet taken from the last few elements of your data array:
[Date.UTC(2015, 0, 31, 6, 38, 0), 1.32905],
[Date.UTC(2015, 0, 31, 6, 38, 0), 1.30528],
[Date.UTC(2015, 0, 31, 10, 8, 0), 1.49073],
[Date.UTC(2015, 0, 31, 10, 8, 0), 1.46641],
[Date.UTC(2015, 0, 31, 12, 5, 0), 1.33667],
[Date.UTC(2015, 0, 31, 12, 5, 0), 1.33403],
[Date.UTC(2015, 0, 31, 14, 5, 0), 1.39598],
[Date.UTC(2015, 0, 31, 14, 5, 0), 1.50467],
[Date.UTC(2015, 0, 31, 15, 40, 0), 1.29815],
[Date.UTC(2015, 0, 31, 15, 40, 0), 1.27599],
Remove duplicate x values from your data if you do not want them to be plotted in this manner.

highcharts.js how to force x-Axis label to display all months regardless of chart size

i am working on a area charts.
http://jsfiddle.net/b8eoszt0/
my example is a bit complex or different from the ones we usually see.
for the data structure, i have 4 weeks aggregated data for each month
eg: Sep1-7: 0, Sep8-15: 20 and so on.
the chart works fine, it displays all data points (5 points each month)
However, for the x-axis labels, what i wanted is to always display "Sep, Oct, Nov, Dec, Jan", regardless what chart size is, because right now, if you resize the broswer, the chart resize, and the a-axis labels are change. sometimes there is less items, sometimes there is more.
$(function () {
$('#container').highcharts({
chart: {
type: 'area'
},
xAxis: {
opposite: true,
type: 'datetime',
dateTimeLabelFormats: { // don't display the dummy year
day: '%b %e',
week: '%b %e',
month: '%b'
},
lineWidth: 0,
startOnTick: false,
endOnTick: false,
tickWidth: 0
},
yAxis: {
gridLineWidth: 0
},
series:[
{
showInLegend: false,
data: [
[Date.UTC(2015, 8, 1), 0],
[Date.UTC(2015, 8, 8), 30],
[Date.UTC(2015, 8, 15), 20],
[Date.UTC(2015, 8, 22), 50],
[Date.UTC(2015, 8, 29), 20],
[Date.UTC(2015, 9, 1), 0],
[Date.UTC(2015, 9, 8), 30],
[Date.UTC(2015, 9, 15), 20],
[Date.UTC(2015, 9, 22), 50],
[Date.UTC(2015, 9, 29), 20],
[Date.UTC(2015, 10, 1), 0],
[Date.UTC(2015, 10, 8), 30],
[Date.UTC(2015, 10, 15), 20],
[Date.UTC(2015, 10, 22), 50],
[Date.UTC(2015, 10, 29), 20],
[Date.UTC(2015, 11, 1), 0],
[Date.UTC(2015, 11, 8), 30],
[Date.UTC(2015, 11, 15), 20],
[Date.UTC(2015, 11, 22), 50],
[Date.UTC(2015, 11, 29), 20],
[Date.UTC(2016, 0, 1), 0],
[Date.UTC(2016, 0, 8), 30],
[Date.UTC(2016, 0, 15), 20],
[Date.UTC(2016, 0, 22), 50],
[Date.UTC(2016, 0, 29), 20],
]
}
],
});
});
i have tried pointinterval, but it doesn't allow Month.
i have tried labels formatter, but it doesnt returns all labels, it seems hightcharts did some filtering before getting into formatter functions.

You can set type on the axis and define your unit.
Check fiddle. I have added the following code in your xAxis. Hope this helps.
type: 'datetime',
units: [
[
'month', [1, 3, 6]
]
]
The first number of the array defines the interval, so for every month I have set 1, you you were to display label only two months the first value would be 2. The next numbers on the array are for allowed multiples, for your requirement this is not needed, a simple 'month', [1] would do. Check the Api Reference for more information.

You can use tickPositioner, for example: http://jsfiddle.net/b8eoszt0/2/
tickPositioner: function(min, max) {
var ticks = this.tickPositions, // original ticks
newTicks = [], // container for a new ticks
start = new Date(ticks[0]); // first tick
// render tick in a first day of the month
start.setDate(1);
// add labels, one for every month:
while (min <= max) {
start.setMonth(start.getMonth() + 1);
min = start.getTime();
newTicks.push(min);
}
// store original info of labels:
newTicks.info = ticks.info;
return newTicks;
},

highcart.js pointInterval for 15 days datetime x-axis

I want the time interval to be half month for x-axis. I figured out I can use pointInterval, but I am not sure why it doesn't work as expected
http://jsfiddle.net/nizsu/otatsrbq/
I expect the x-axis value to be: Aug 26, Sep 11, Sep 26
html
<div class="module" id="changelist">
<div id="chart1" style="min-width: 90%; height: 400px; margin: 0 auto"></div>
</div>
js
$(function () {
$('#chart1').highcharts({
xAxis: {
type: 'datetime',
pointInterval: 13 * 24 * 3600 * 1000, //half month interval
pointStart: Date.UTC(2014, 7, 26),
dateTimeLabelFormats: {
month: '%b %e',
year: '%b'
}
},
series: [{
name: 'New Visits',
data: [
[Date.UTC(2014, 7, 26), 50],
[Date.UTC(2014, 7, 27), 60],
[Date.UTC(2014, 7, 28), 65],
[Date.UTC(2014, 7, 29), 70],
[Date.UTC(2014, 7, 30), 20],
[Date.UTC(2014, 7, 31), 10],
[Date.UTC(2014, 8, 1), 75],
[Date.UTC(2014, 8, 2), 80],
[Date.UTC(2014, 8, 3), 85],
[Date.UTC(2014, 8, 4), 77],
[Date.UTC(2014, 8, 5), 70],
[Date.UTC(2014, 8, 6), 20],
[Date.UTC(2014, 8, 7), 17],
[Date.UTC(2014, 8, 8), 80],
[Date.UTC(2014, 8, 9), 75],
[Date.UTC(2014, 8, 10), 73],
[Date.UTC(2014, 8, 11), 78],
[Date.UTC(2014, 8, 12), 82],
[Date.UTC(2014, 8, 13), 15],
[Date.UTC(2014, 8, 14), 18],
[Date.UTC(2014, 8, 15), 65],
[Date.UTC(2014, 8, 16), 70],
[Date.UTC(2014, 8, 17), 67],
[Date.UTC(2014, 8, 18), 73],
[Date.UTC(2014, 8, 19), 80],
[Date.UTC(2014, 8, 20), 17],
[Date.UTC(2014, 8, 21), 22],
[Date.UTC(2014, 8, 22), 65],
[Date.UTC(2014, 8, 23), 63],
[Date.UTC(2014, 8, 24), 68],
[Date.UTC(2014, 8, 25), 65],
[Date.UTC(2014, 8, 26), 70]
]
}, {
name: 'Total Visits',
data: [
[Date.UTC(2014, 7, 26), 75],
[Date.UTC(2014, 7, 27), 78],
[Date.UTC(2014, 7, 28), 80],
[Date.UTC(2014, 7, 29), 85],
[Date.UTC(2014, 7, 30), 35],
[Date.UTC(2014, 7, 31), 30],
[Date.UTC(2014, 8, 1), 90],
[Date.UTC(2014, 8, 2), 95],
[Date.UTC(2014, 8, 3), 95],
[Date.UTC(2014, 8, 4), 97],
[Date.UTC(2014, 8, 5), 93],
[Date.UTC(2014, 8, 6), 30],
[Date.UTC(2014, 8, 7), 25],
[Date.UTC(2014, 8, 8), 90],
[Date.UTC(2014, 8, 9), 95],
[Date.UTC(2014, 8, 10), 93],
[Date.UTC(2014, 8, 11), 99],
[Date.UTC(2014, 8, 12), 95],
[Date.UTC(2014, 8, 13), 35],
[Date.UTC(2014, 8, 14), 30],
[Date.UTC(2014, 8, 15), 95],
[Date.UTC(2014, 8, 16), 94],
[Date.UTC(2014, 8, 17), 92],
[Date.UTC(2014, 8, 18), 95],
[Date.UTC(2014, 8, 19), 100],
[Date.UTC(2014, 8, 20), 30],
[Date.UTC(2014, 8, 21), 33],
[Date.UTC(2014, 8, 22), 95],
[Date.UTC(2014, 8, 23), 91],
[Date.UTC(2014, 8, 24), 90],
[Date.UTC(2014, 8, 25), 94],
[Date.UTC(2014, 8, 26), 95]
]
}]
});
});

The setting you want is tickInterval, not point interval. You also need to specify startOnTick: true to make it start on your first point.
xAxis: {
type: 'datetime',
tickInterval: 13 * 24 * 3600 * 1000, //half month interval
pointStart: Date.UTC(2014, 7, 26),
startOnTick: true,
dateTimeLabelFormats: {
month: '%b %e',
year: '%b'
}
},
http://jsfiddle.net/pdy4deew/