Calculating min/max of data points on 'y axis' -highcharts - highcharts

I want to calculate the min max for the data points, my fiddle:
http://jsfiddle.net/4NxYh/108/
I tried setting the min and max values to "null" as per the docs of highcharts-http://api.highcharts.com/highcharts/yAxis.max, but not sure how this one works exactly..
yAxis: {
min: null,
max: null
}
Ideas/help appreciated!Thanks

Related

Highcharts: Y axis max value should be greater than the data point

For Highcharts, I want the y-axis max value to be slightly greater than the max data point but it should never exceed "100".
I tried setting max =100, the problem is whenever the data point is too small like say 12, the line is pushed down. In this case the max value should not be 100 but slightly greater than 12.
here's a small snippet.
https://codepen.io/thushara07/pen/qQWjZG
maxPadding: 0.1,
endOnTick: false,
expected: Max value should be greater than the max data point but it should never exceed 100.
In the load chart event you can check the axis max property and use setExtremes, if it is necessary:
chart: {
...,
events: {
load: function() {
var yAxis = this.yAxis[0];
if (yAxis.max > 100) {
yAxis.setExtremes(null, 100, true, false);
}
}
}
},
Live demo: http://jsfiddle.net/BlackLabel/moyr4xec/
API Reference: https://api.highcharts.com/class-reference/Highcharts.Axis#setExtremes

Highchart Min Max for y-axis per series

i have a highchart with 4 series. I also only set the min value for each y-axis to 0 cause there arent any negative values possible. now highchart is calculating the max value by itself what is nice BUT i need this for each series itself. The reason is that i have 2 series with very high values from the range up to 5000 and the other two values are relativ small from 0 to 50.
The max value highcharts calculates is used for all four series - so the chart looks like this:
As you can see you can only see the two high value series - the other two arent really visible at the bottom of the chart.
When i disable the two series with the high values the chart looks nice for the other two values:
is there any flag i can use so highchart will calculate the max value / scale per series? Or have i really calculate it by myself - also on zoom and so on.
I found this: https://github.com/highcharts/highcharts/issues/4248
But i thought thats some basic functionality with is needed very often so there has to be something..
greetings
Maybe it would be better to use logarithmic axis type? Your chart would have only one axis adjusted to much difference between the values of series points. When it comes to differences between units of measurement, always you can set the different tooltip.pointFormat definition for specific series.
Highcharts.chart('container', {
title: {
text: 'Logarithmic axis demo'
},
yAxis: {
type: 'logarithmic',
},
series: [{
data: [1, 20, 30, 22, 16, 32, 45, 24, 11, 2],
pointStart: 1,
tooltip: {
pointFormat: '<b>{point.y} km/h</b>'
}
}, {
data: [4500, 3450, 4242, 2348, 5216, 3212, 4564, 3128, 5256, 4512],
pointStart: 1,
tooltip: {
pointFormat: '<b>{point.y} kW/h</b>'
}
}]
});
Live example: https://jsfiddle.net/bfnj4mp8/
API Reference:
https://api.highcharts.com/highcharts/yAxis.type
https://api.highcharts.com/highcharts/series.line.tooltip.pointFormat

Highchart always show max value for y Axis

I set the max value for yAxis but in some situation, I see a value more than max value that I set for Highchart.
I need in any situation max value will be shown in yAxis.
By default Highcharts computes values for ticks and may round up the maximum extreme so that it has the same value as the last tick.
You can modify ticks in tickPositioner callback to make sure that the max value will always be shown as a tick:
yAxis: {
max: 110,
min: -20,
tickPositioner: function() {
var tickPositions = this.tickPositions,
lastTick = tickPositions[tickPositions.length - 1],
max = this.options.max;
if (lastTick > max) {
tickPositions.pop(); // remove last tick
tickPositions.push(max);
}
}
},
Live demo: http://jsfiddle.net/kkulig/8k4skeh9/
API reference: https://api.highcharts.com/highcharts/xAxis.tickPositioner
With tickInterval (API) it's works
Fiddle
Edit :
For dynamic data you can use SetExtreme method API or update to update the tickInterval API

HIghcharts 4 solid gauge max value

I'm trying to display a solid gauge with a "strange" max value, that is 96 (hours).
I'read that max and min value are elaborated by highcharts to set ticks, ranges etc but I don't understand why I can't display such a value or even other rounded values like 90 below 100.
Any idea?
The problem may be that the chart is generating a default tick interval e.g. 10, which adds up to 100.
You may be able to get what you want by specifying a tickerInterval which divides into 96 (e.g. 8).
yAxis: {
min: 0,
max: 96,
tickInterval:8,
http://jsfiddle.net/Vn4My/
You can use any max value, only thing is you should divide it by 1000 to get the tickInterval value, for example:
yAxis: {
min: 0,
max:96,
tickInterval:(96/1000),
},
Working example: http://jsfiddle.net/NareshChennuri/whuu5qbt/
To get the exact custom max value :
tickPositioner: function() {
return [this.min, this.max];
},
min: 0,
max: 6924,
refer this issue on github
Try This I am also facing the same issue but I resolve that issue this solution may be useful for you.
yAxis: {
min: minData,
max: maxData,
tickPositions: [minData, maxData]
},
Add tickPositions: [minData, maxData];
pls check similar example Example
Ref reference click here
I hope this is enough.
Thanks,
PVS

Highcharts: Ensure y-Axis 0 value is at chart bottom

I'm outputting a series of highcharts on a page. In some instances, all data for the specified time period may come back with 0 values.
In such a case, the chart looks like this: http://jsfiddle.net/charliegriefer/KM2Jx/1/
There is only 1 y-Axis label, 0, and it's in the middle of the chart.
I'd like to force that 0 value for the y-Axis to be at the bottom of the chart, which would be consistent with other charts on the page that do have data.
Have tried various yAxis properties, such as "min: 0", "minPadding: 0", "maxPadding: 0", "startOnTick: true".
Seems it should be pretty straightforward, but I'm at a loss :(
Relevant yAxis code:
yAxis: {
min: 0,
minPadding: 0,
startOnTick: true,
title: {
text: ""
}
},
I've found another (and very simple) solution:
You can set y-axis minRange property:
yAxis: {
...
minRange : 0.1
}
This makes Highcharts render yAxis min and max values when all data is 0.
UPDATE:
Highcharts 4.1.9 fix also needs:
plotOptions: {
line: {
softThreshold: false
}
}
updated js fiddle
Only way I could get it to show it "correctly" was by also providing an yAxis max value. I think this is a HighCharts issue when you provide no data elements with a y-value. It draws the best chart it thinks it can.
I had also posted this to the HighCharts forum, where I got a response that seems to work. Unfortunately, it will involve me doing some pre-processing of the data prior to rendering the charts in order to check for all "0" data values... but it'll work. Just wish there was something more "built-in" to HighCharts.
So after summing up the "y" values, if I get 0, the y-axis properties should look like this:
yAxis: {
minPadding: 0,
maxPadding: 0,
min: 0,
max:1,
showLastLabel:false,
tickInterval:1,
title: {
text: ""
}
}
See: http://jsfiddle.net/KM2Jx/2/
The keys seem to be the "max" and "showLastLabel" properties.
Here is a fix I came up with that doesn't require any preprocessing of the data and just let highcharts do it, like it used to before the update. http://jsfiddle.net/QEK3x/
if(chart.yAxis[0].dataMax === 0)
{
chart.yAxis[0].setExtremes(0, 5);
}
You only need to check the first series axis, as if the first one is not 0 then the problem won't occur. I might submit a pull request for this to high-charts, though I kinda feel like they intended for this functionality for some reason.
Since Highcharts 5.0.1, you can also use softMax.
softMax: Number
A soft maximum for the axis. If the series data maximum is greater than this, the axis will stay at this maximum, but if the series data maximum is higher, the axis will flex to show all data.
yAxis: {
min: 0,
softMax: 100,
...
}
Here is an example with a column chart : http://jsfiddle.net/84LLsepj/
Note that currently, in Highcharts 5.0.7, it doesn't seem to be working for all types of charts. As you can see in this other jsfiddle, it doesn't work with line chart.
Just add "min" option
yAxis: {
min: 0
}
For Highcharts 5.x.x, you should be able to just specify:
yAxis: {
softMin: 0,
softMax: 1,
};
This won't work for line chart, which requires that you also set minRange in the same config object as above. Experiment with different values, since defining for example minRange: 6, created a range on yAxis between 0 and 4.
minRange : 1 or whatever you feel so to be displayed in fractions of
softMax : 100 or whatever you feel so
yAxis: {
minRange : 1,
softMax: 100
}

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