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Highcharts yAxis Categories with string values: error 14

Right off the bat here is the desired chart in ChartJS.
We have two x-axes. One showing power from a meter and the other showing meter state over time (open, closed, or in standby) In both datasets the X axis is Unix time. The power Y axis is numerical and the state x axis is one of the three state categories. Both are drawn in lines.
To get right to the point: how do I do this in Highcharts? I have the second axis set up:
xAxis: {
type: 'datetime'
},
yAxis: [
{
title: {
text: 'Real Power'
}
},
{
type: 'category', //I have also removed this line
title: {
text: 'state'
},
categories: ['closed', 'standby', 'open']
}
],
Any attempt to set the Y axis value to a string in highcharts results in a well known: https://www.highcharts.com/errors/14/
Furthermore online I only seem to find categories on the X axis. Any help getting to the right place is appreciated. Thanks in advance.

You can't use a string as x value, use a number instead, for example:
series: [{
...
}, {
...,
yAxis: 1,
data: [1, 0, 2, 1]
}],
yAxis: [{
...
}, {
title: {
text: 'state'
},
categories: ['closed', 'standby', 'open'],
min: 0,
max: 2
}]
Live demo: http://jsfiddle.net/BlackLabel/o7Lvyadm/
API Reference: https://api.highcharts.com/highcharts/yAxis

Highcharts - Alignment issue on 3rd Y axis

I have three Y axis and two of which has got multiple spline series to be shown. My data is a time series data and it is all working as expected. Just that the labels of one of the Y axis is mixing up with chart area.
https://codesandbox.io/s/github/ismusidhu/yaxis_alignment_issue_highcharts/tree/master/

You can resolve it by setting appropriate yAxis.offset:
yAxis: [{
title: {
text: "POAI [W/m2]"
},
opposite: true,
offset: 70,
min: 0,
labels: {
format: "{value} W/m2"
}
}]
Demo:
https://codesandbox.io/s/alignment-of-highcharts-tertiary-y-axis-issue-bo7h4

How to create legend for Plotlines with Highstock of Highcharts?

I have a Highstock graph with Plotlines here: http://jsfiddle.net/qd0rmazg/3/
I'd like to be able to have a legend of Plotlines where, similar to the legend of Series, upon a click Plotlines of a certain category can be made visible or hidden.
In my JSfiddle example, there are 2 categories of Plotlines. Is it possible to toggle the visibility of Plotlines per one category? I couldn't seem to find anything supporting this.
This is how I've created the Plotlines:
xAxis: {
plotLines: [{
value: Date.UTC(2016, 12, 29), // year, month, day
width: 1,
color: 'blue',
dashStyle: 'ShortDash',
label: {
text: 'Category 1',
},
}, {
value: Date.UTC(2016, 11, 12), // year, month, day
width: 1,
color: 'green',
dashStyle: 'Solid',
label: {
text: 'Category 2',
}]
}

As far as I know, there is no native HC legend for the plot lines. But, you can create your custom legend element on the page and use HC capabilities to show/hide plot lines as in their examples:
http://jsfiddle.net/gh/get/library/pure/highcharts/highcharts/tree/master/samples/highcharts/members/axis-addplotline/
chart.xAxis[0].removePlotLine('plot-line-1');
chart.xAxis[0].addPlotLine({
....
id: 'plot-line-1'
});

As noted in my comment, there is a feature request here:
https://highcharts.uservoice.com/forums/55896-highcharts-javascript-api/suggestions/3009547-plotlines-on-legend
Please add your votes and comments.
Vladimir M provided a good solution to show/hide the plot lines with your own custom legend.
The other common approach is to use a line series as your plotLine, which gives you the benefit of the full series functionality.
Example series:
{
name: 'PlotLine',
type: 'line',
color: 'rgba(204,0,0,1)',
data: [25,25,25,25,25,25,25,25,25,25]
}
Fiddle:
http://jsfiddle.net/jlbriggs/nh65m306/
If you need a vertical plot line, the data set up is slightly more complex but still quite feasible.
{{EDIT to demo vertical plot line:
First, you;d have to set a min/max for you y axis (could be done programmatically on chart load):
yAxis: {
min: 0,
max: 75,
maxPadding: 0
}
Then, you specify your data in [x,y] pairs, with the x values being your plotLine value, and the y values being your Y axis min and max:
data: [[4,0], [4,75]]
Updated fiddle:
http://jsfiddle.net/jlbriggs/nh65m306/1/
With that method, you could add a series per plot line, or, if you want all of them to be the same legend and settings, you can add multiple by inserting null points between your desired lines:
data: [[4,0], [4,75], [5,null], [7,0],[7,75]]
Fiddle:
http://jsfiddle.net/jlbriggs/nh65m306/2/

flot jquery is it possible to draw this kind of chart

I used to draw this kind of chart (one vertical axis, one horizantal axis):
Now i have been asked to do this kind of chart:
as you see, the problem with the ordered chart that it contains (two vertical axis, one horizantal axis).
My question
does flot or any other jquery library able to do that please?

See the flot example here on multiple axis. Minimal example:
$.plot("#placeholder", [
{ data: d1 },
{ data: d2, yaxis: 2 } // set second series to use second axis
], {
yaxes: [ {
min: 0 // options for first axis
}, {
alignTicksWithAxis: 1 // options for second axis, put it on right
position: "right"
} ],
});
Two mix a bar and line chart set that in each's series object:
$.plot("#placeholder", [{
data: d1,
lines: { show: true }
}, {
data: d2,
bars: { show: true }
}]);
Putting these together, here's an example:

Is it possible to have two Y Axis in a highstock chart from highcharts one on the left and another on the right?

Is it possible to have 2 yAxis in a highstock chart from highcharts one on the left and another on the right ?
Thanks

A very simple example:
First you have to create your new yAxis and set it's position.
{
title: {
text: 'Other data panel'
},
top: 300,
height: 100,
offset: 0,
lineWidth: 2,
opposite: true
}
Then, when you create your serie you in what yAxis it will be placed.
{
type: 'column',
name: 'Other',
data: otherData,
yAxis: 2,
dataGrouping: {
units: groupingUnits
}
}
You can see it working here.