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/
Related
I have Highstock with default data for each year from 2001 to 2009 as shown in below JSFiddle:
JSFiddle
Now on button click event I want to increase the xAxis extreme to year 2020 even though there is no data available.
I am trying to set extreme by following code:
var newDate = new Date(2019, 03, 23).getTime();
chart.xAxis[0].setExtremes(new Date(2000, 1, 1).getTime(), newDate, true);
But its not working.
In the Highcharts API we can read:
ordinal: boolean
In an ordinal axis, the points are equally spaced in the chart regardless of the actual time or x distance between them. This means that missing data periods (e.g. nights or weekends for a stock chart) will not take up space in the chart. Having ordinal: false will show any gaps created by the gapSize setting proportionate to their duration.
In stock charts the X axis is ordinal by default, unless the boost module is used and at least one of the series' data length exceeds the boostThreshold.
Defaults to true.
So, you need to disable the ordinal option:
xAxis: {
ordinal: false
},
Live demo: https://jsfiddle.net/BlackLabel/fzo7ahg0/
API Reference: https://api.highcharts.com/highstock/xAxis.ordinal
My xAxis is displaying the years with decimals depending on the width of the screen, so if its small it will display(2012,2013,2014...) but when I increase the width of the screen it will display (2012, 2012.1, 2012.2, 2012.3 ...) and the decimal places change depending of the width(2012, 2012.5, 2013 ...)
I know that tickPixelInterval has some effect on that but I don't know what value to use, I`ve tried:
xAxis: {
tickPixelInterval: 100, //also tried 10 and 1 and 1000 even null
crosshair: true
}
What can I do so the chart only displays the whole number of the years (2012, 2013, 2014) not depending on the screen size and NOT giving an specific width to the div that renders the chart?
http://jsfiddle.net/antonioj1015/ff2m2bsx/7/
tickPixelInterval will give a setting of how far apart ticks should be - that won't help in your situation, and will in fact make sure the problem persists.
What you want is just tickInterval, and set it to 1, since your year numbers are in increments of 1:
http://jsfiddle.net/ff2m2bsx/8/
if you won't always have increments of 1, another option is the allowDecimals property:
http://jsfiddle.net/ff2m2bsx/9/
References:
http://api.highcharts.com/highcharts#xAxis.tickInterval
http://api.highcharts.com/highcharts#xAxis.allowDecimals
A 3rd option is using a datetime x axis type, and setting the dates as your x axis values, and setting your tickInterval to one year.
http://api.highcharts.com/highcharts#xAxis.type
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.
I hava a line chart on HighCharts that displays dateTimeLabels correctly. But if change it to type:column the labels are replaced by numbers and all columns have the same height.
http://highcharts.com/jsbin/ihorog/edit#javascript,live
(To check the error just uncomment type:column on jsbin)
This is because a column is drawn as being from zero to the value and since your values are created by Date.UTC(), zero is Jan 1, 1970. Since the labels span such a large time span it is doing something weird. Specify a min for your yAxis and it will start from there.
http://highcharts.com/jsbin/uvuvoh/edit#javascript,live
yAxis: {
min : Date.UTC(2013,0,1),
...
},