I have generated a graph inside highstock (see example - http://jsfiddle.net/szFQa/),
however, by default, it groups data that is chronologically close together, and stops the timeline from showing time in a linear form.
I've tried using the following options, there seems to be no change though.
plotOptions : {
series : {
dataGrouping : {
enabled : false
},
}
},
What options need to be set to stop the grouping and show the timeline as linear?
In case when you disable dataGrouping like this http://jsfiddle.net/szFQa/1/ then points are not grouped, because in your data you have 16 points and on the chart is also 16 points.
plotOptions: {
series: {
dataGrouping:{
enabled:false
},
marker: {
enabled: true
}
}
},
Related
I`m struggling with the esthetic aspect of my chart. Actually it lookes like this:
Chart is showing data over time in 10mins intervals. With that number of labels it`s hard to see what column matches to time.
I would like to create ticks like on the image, so the chart would be way more readable. I looked into documentatnion and tried this but without effect:
scales: {
xAxes: [
{
ticks: {
drawTicks: true,
},
},
],
Pasting the answer from the comment section,
best way to work with ticks is by using callback function eg:
ticks: {
callback: function (value: any, index: any, ticks: any) {
return 'What you want to return';
},
}
I need to show grid lines when my chart has no data. (For now, It shows a blank division when there is no data) How to show grid lines? Is it possible to do? I tried but couldn't find an useful answer. Following is the method I used to draw the chart.
public drawChart(): void {
this.options = new StockChart ({
rangeSelector: {
selected: 0,
inputEnabled: false,
},
chart: {
type: 'spline',
},
yAxis: {
labels: {
formatter: function(): string {
return this.value + '';
},
},
opposite: false,
},
plotOptions: {
series: {
showInNavigator: true,
},
},
series: [],
});
}
To show the gridlines yAxis needs to have defined some min and max values. When series is applied those values are calculated and set to the yAxis, but in the case of the empty data, we need to apply them as the dummy values. Later, when data will be applied we can reset those values by using the yAxis.update feature.
Demo: https://jsfiddle.net/BlackLabel/zcsp8nfr/
API: https://api.highcharts.com/class-reference/Highcharts.Axis#update
API: https://api.highcharts.com/class-reference/Highcharts.Series#update
How can I exclude a specific data series from showing in the tooltip with tooltip.trigger = axis?
I'm asking because I have a very complex graph with one line chart, two bar charts and one heatmap. And the heatmap has so many data that the tooltip ends up with too many lines. The heatmap values are not very important, so I would like to remove them from showing in the tooltip.
Right now I'm using formatter to exclude them, but is there any other way?
I do exactly the same: adding a new attribute to the series and checking it from formatter.
Something like this:
series: [{
// ...
showInTooltip: true
// ...
}]
// ----
formatter: series => {
var displayed = series.filter(item => item.showInTooltip);
// work with displayed where showInTooltip === true
}
Also you can store callback instead attribute and it will work.
Updated: Suddenly I found undocumented feature and it will solved you trouble by the right way, apparently.
series: [{
// ...
tooltip: {
show: false
}
// ...
}]
I am rendering a Gantt chart with different series color. The colors are somehow not reflected on the navigator at the bottom. How can I display the same colors in both series and navigator?
Fiddle link : Fiddle
Note: These colors are going to be dynamic which will be based on different cases. So I want them to reflect in the navigator too, dynamically.
I am changing color of the series like so :
chart: {
events: {
load: function() {
Highcharts.each(this.series[0].points, function(p) {
p.color = 'grey'
});
}
}
},
As you can see series color is grey but in the navigator below, I see different colors.
As per highcharts-gantt documentation:
Update the series with a new set of options. For a clean and precise handling of new options, all methods and elements from the series are removed, and it is initialized from scratch.
On event, you should then go through given serie points and change its options (in your case 'color').
The changes will be applied in the timeline below - example code changes the color after 1,5sec.
//Updating the color
setTimeout(function() {
for (var i = 0; i < chart.series[0].points.length; i++) {
chart.series[0].points[i].update({
color: "grey"
});
}
}, 1500);
Working example
In your code it would be:
events: {
load: function() {
Highcharts.each(this.series[0].points, function(p) {
p.update({color: "grey"});
});
}
}
To avoid shrink of timeline - launch setExtremes() after chart update.
Fires when the minimum and maximum is set for the axis, either by calling the .setExtremes() method or by selecting an area in the chart.
//Fully selected timeline
this.xAxis[0].setExtremes();
Working example - timeline selection
You can also set options for series of navigator, like below:
navigator: {
series: {
...,
colorByPoint: false,
color: 'grey'
},
...
}
Live demo: https://jsfiddle.net/BlackLabel/c4j9dvqx/
API Reference: https://api.highcharts.com/gantt/navigator.series.color
I would like to ask how can I position bottom labels using ChartJS library to display them like on the image below:
I tried to find it in official docs, but without the luck.
Many thanks for any advice.
In the xAxe ticks attribute, you can edit the userCallback property to change what is displayed on your labels. Furthermore, if you return an array of strings, every string will be displayed with line breaks.
So if you combine these two informations, you'll get the following :
options: {
scales: {
xAxes: [{
ticks: {
userCallback: function(tick, value, ticks) {
// `ticks` is the default display
// `.split("")` makes it an array of every character
return tick.split("");
}
}
}]
}
}
You can see a working example on this jsFiddle and here is its result :