I have a graph showing rankings over a time periods, but I can't figure out how to get the y axis to start at 1 and also label it as 1.
This is the closest I have got
yAxis: {
min: 1,
startOnTick: false,
reversed: true
},
http://jsfiddle.net/270dj43o/
The y-axis starts at 1, but it fails to show it as a tick on the y-axis. (In this example all I need is a 1 above the 2.5 on the y-axis)
This is a graph ranking someones performance over multiple time periods, so it needs to always show 1 instead of 0.
Note I know that setting the tickInterval to 1 makes it display 1, but that isn't viable option in my situation.
There is a tickPositioner function which you can apply on yAxis so you can apply your own tick points : http://jsfiddle.net/270dj43o/3/
EDIT: Apart of tickPositioner, you can use also tickPositions.
Related
I am working on real time data stream with spline chart https://www.highcharts.com/demo/dynamic-update/dark-green. Here i want to set fixed y-axis scale (I know my data range from 0 to 4 max) but here chart update dynamically.
Is it possible to set fixed y-axis so that chart update as per fixed y-axis scale.
For any axis you can set a minimum and a maximum value with axis.min (doc) and axis.max (doc). If you want to be very precise (or your ticks are causing problems) you might have to disable startOnTick and endOnTick to set your specific values, as described in the documentation of min and max.
For example (JSFiddle demonstration):
yAxis: {
min: 0.25,
max: 0.75,
startOnTick: false, // optional
endOnTick: false, // optional
// ...
}
see this jsfiddle: http://jsfiddle.net/k0hrz224/2/
i want the max value of the yaxis to be 100. currently, as you can see, it is 150 and i dont know why, because i explicitly set max: 100 of this yaxis.
i know that changing (on line 101)
min: -25
to
min: 0
seems like a solution. however i need min: -25 because i want to display A and B as it is shown in the example.
Things can get a little odd when you have multiple y axes.
Add this to your chart:
chart: {
alignTicks:false
}
Which will stop the different axes from trying to resolve with each other, and stop your axis at 100.
Example:
http://jsfiddle.net/jlbriggs/k0hrz224/4/
Reference:
http://api.highcharts.com/highcharts#chart.alignTicks
finally i managed to do it. i "hardcoded" the ticks on my own:
tickPositions: [-25, 0, 25, 50, 75,100]
then i experienced the desired behavior, i.e., no wrong autoscaling of any axis.
I have a highcharts column chart with an x-axis for an entire year. Its type is datetime and its min/max is from 2014-01-01 to 2014-12-31.
Why is the tick/label for Jan 2015 displayed?
Full source at http://jsfiddle.net/nkjm2691/1/
I tried a number of things like setting the end date to Date.UTC(2014, 11, 31, 23, 59, 59) and experimenting with tickInterval. What I need eventually is a monthly tick (i.e. irregular interval) and the labels centered between the ticks. Using some voodoo logic to calculate the offset only ever works if the chart has a fixed width.
Quite surprisingly doing more or less the same with a chart of type areaspline works fine: http://jsfiddle.net/fm86v8fe/
I also checked a number of related SO questions like Is there a reliable way to have a 1 month auto generated tick interval with high charts? and HighCharts xAxis - tickInterval for month but they don't solve my problem.
You posted this JSFiddle. Just changing from type: 'column' to type: 'line' removes he label. Why?
That is because any chart type that is "column like" has a pointRange. This is defined differently depending on context, but for your datetime x-axis it is (API):
On linear and datetime axes, the range will be computed as the distance between the two closest data points.
It is this pointRange that causes your column to have their specific width. They have a span across the x-axis. As you can see on your chart each column has a range of a week, not just a single millisecond (which is the case for line-charts, and similar).
From my understanding this causes Highcharts to take some extra space to somehow better suit the point range of the chart points.
There are several things you can do. You can manually override the pointRange like this:
series: { pointRange: 1, data: ... }
This will make each column only 1 millisecond thick, and removes the label. You can fix the width with pointWidth:
series: { pointRange: 1, pointWidth: 10, data: ... }
Note however that this is static, so if columns suddenly get too close they'll start overlapping. Here's a JSFiddle demonstration.
Also you could do nothing and just set the max to be far enough back in time for pointRange not to include too much extra space, like this:
xAxis: { min : Date.UTC(2014, 0, 1), max : Date.UTC(2014, 11, 28) }
Note here that Highcharts seems to add more space once you go over to the 29th of December. Unfortunately I'm not exactly sure how this spacing is chosen (the 29th is a Monday..?).
Sebastian suggested some solutions that don't involve this type of manipulation at all. The chosen "solution" depends on the other requirements and desired behavior of the chart.
Set a max date as 1.12, remove time and set maxPadding as 0 value. In case when you use a tiem (23:59:59) tick Interval cannot be calculated properly. Second solution is using tickPositioner
https://jsfiddle.net/nkjm2691/50/
I am trying to set my X and Y axes to have set minimums, maximums and intervals. Easy enough according to the docs - and indeed I have had no problem working with Highcharts to date - in fact the complete opposite, it's an awesome, awesome tool. However, when I add errors bars to my line series', it seems to knock out the x-axis - http://jsfiddle.net/Su44W/
Simply changing to series' type to arearange (http://jsfiddle.net/46dsn/1), providing the same data points [x, low, high], the chart now respects my min, max and tickInterval on the x-axis. So this begs the question, is this a bug or and I doing something wrong?
From my understanding the errorbar causes the axis to consider itself part of a "column-like chart". That is, the points on the axis have a span. The result of this is that this piece of code is ran to prevent more ticks than there are points (found on line 7194 of the source):
// In column-like charts, don't cramp in more ticks than there are points (#1943)
if (axis.pointRange) {
axis.tickInterval = mathMax(axis.pointRange, axis.tickInterval);
}
I'm not exactly sure how this solves the problem, but in some way setting the pointRange of the errorbar series causes the axis to use that pointRange for the axis as well. I'm guessing it just uses the maximum point range of all series, or something similar. This means your specified tickInterval will be the "max" in the above mathMax-function. Like this:
{
name: 'Series 1 error bars',
data: [
[4,7.26,7.34],
[12,6.85,7.06],
[26,6.92,7.12]
],
linkedTo: ':previous',
color: "#013879",
zIndex: 0,
whiskerLength: 7,
type: 'errorbar',
pointRange: 0
}
Check this JSFiddle link for pointRange in action.
The negative effect that this will have is that the top and bottom line for your errorbars will have very short width. You can counter this by specifying a pointWidth for the series as well, as in this JSFiddle demonstration.
I need to add a new series to this chart which will allow me to highlight / shade a particular range of dates. It needs to be 100% height of the chart.
I was looking at using another area series, but I couldn't get it working as I wanted it given I have two existing area series on this chart.
I thought another series which had a 1 or 0 for the particular point to indicate if it should be highlighted or not?
{name: 'mydates',
color:'red',
fillOpacity: 0.3,
data: [0, 0, 0,1,1,1,1, 1, 1,1,0,0],
type:'area',
stacking: 'percent'
},
http://jsfiddle.net/L3ynM/
The problem with my sample:
The 'mydates' series doesn't take 100% height of the chart
If the 'mydates' series begins midchart, it starts with an angle. I'd like it to go straight up
Unless you really need the legend entry, I would recommend using plotBands instead
http://api.highcharts.com/highcharts#xAxis.plotBands
You can also do it like this, if you do really need the legend:
http://jsfiddle.net/jlbriggs/JVNjs/305/
data:[[1.5,0],[1.5,80],[2.25,80],[2.25,0]]
It relies in part on setting a min and max, and using those min and max values as your y data points.