Develop Reference

How to change format of the upper xAxis Label?

How can I change the format of the "upper" xAxis Label as shown in the picture?
I have already figured out how to change the weekday labels below (T, W, T, etc.) with the following snippet (for weeks, code placed within the xAxis):
dateTimeLabelFormats: {
week: {
list: ['Kalenderwoche %W', 'KW%W']
}
},
Existing example to play around:
https://jsfiddle.net/gh/get/library/pure/highcharts/highcharts/tree/master/samples/gantt/demo/resource-management

You have 2 xAxis. So you should provide dateTimeLabelFormats array.
axis with the lower index will be placed lower.
So, your xAxis should be
xAxis: [{
currentDateIndicator: true,
dateTimeLabelFormats: {
day: {
list: ['%A, %e. %B', '%a, %e. %b', '%E']
}
}
},
{
dateTimeLabelFormats: {
week: {
list: ['Kalenderwoche %W', 'KW%W']
},
month: {
list: ['Monat%W', 'KW%W']
}
}
}
],

According to this page, the way to do it is to set the x-axis to be an array of objects, with each representing a level of the x-axis (day, week, month, etc.). In this case: https://jsfiddle.net/vm5t78j3/
xAxis: [{
currentDateIndicator: true,
}, {
labels: {
format: '{value:%W}'
},
}],

Change dateTimeLabelFormats dynamically based on time selection

For me, dateTimeLabelFormats showing inconsistent date-format based on the time selection.
Below is the URL
http://jsfiddle.net/46bk7pvm/2/
In above URL, when I select 6 month it is reflecting with proper date format. Which is '%Y-%m'. But when I select 1 Month or 3 Months it is reflecting with day: '%Y<br/>%m-%d', format. But it should be Month format which is month: '%Y-%m'.
In short for month selection it should be
month: '%Y-%m',
for day selection it should be
day: '%Y<br/>%m-%d',
and for year it should be
year: '%Y'
Here is the code block
Highcharts.stockChart('container', {
xAxis: {
type: 'datetime',
dateTimeLabelFormats: {
second: '%Y-%m-%d<br/>%H:%M:%S',
minute: '%Y-%m-%d<br/>%H:%M',
hour: '%Y-%m-%d<br/>%H:%M',
day: '%Y<br/>%m-%d',
week: '%Y<br/>%m-%d',
month: '%Y-%m',
year: '%Y'
}
},
rangeSelector: {
selected: 1
},
series: [{
name: 'USD to EUR',
data: usdeur
}]
});
How can we set above dateformat dynamically based on the time period selection.?

dateTimeLabelFormats defines format for xAxis ticks according to the distance between closest of them. When you click 1M, then you have only four weeks of data so if there will be room only for four dataLabels then week format will be applied. If you have more space (wider chart) then day format will be used etc.
What you want is probably to change format on labels after button click: http://jsfiddle.net/BlackLabel/wxpfc2k5/
Snippet (only 1M button!):
rangeSelector: {
selected: 1,
buttons: [{
type: 'month',
count: 1,
text: '1m',
events: {
click: function() {
chart.xAxis[0].update({
labels: {
format: '{value:%Y-%m}' // change format on click
}
});
}
}
}, {
type: 'month',
count: 3,
text: '3m'
}, {
type: 'month',
count: 6,
text: '6m'
}, {
type: 'ytd',
text: 'YTD'
}, {
type: 'year',
count: 1,
text: '1y'
}, {
type: 'all',
text: 'All'
}]
}
More about label formatting can be found in the API and docs.

Thanks, Paweł Fus for your suggestion on formatter.
I solved my problem by assigning date-format to formatter. Here is the code.
labels: {
overflow: false,
align: "center",
style: _xaxis_label_style,
step: _step,
staggerLines: _staggerLines,
x: 0,
enabled: true,
useHTML: term_useHTML,
formatter: function () {
if ($j(".hdnSelection").val() == "today") {
return Highcharts.dateFormat(dateformatlable.hour, this.value);
}
else {
var key = "1month"; //default case
if (typeof $j('.hdnSelectionmonth') !== "undefined" && $j('.hdnSelectionmonth').val() != '') {
key = $j('.hdnSelectionmonth').val();
}
var duration = key.substring(1);
switch (duration.toLowerCase()) {
case "day":
return Highcharts.dateFormat(dateformatlable.day, this.value);
case "week":
return Highcharts.dateFormat(dateformatlable.week, this.value);
case "month":
return Highcharts.dateFormat(dateformatlable.month, this.value);
case "year":
return Highcharts.dateFormat(dateformatlable.year, this.value);
break;
case "ytd":
return Highcharts.dateFormat(dateformatlable.year, this.value);
default:
return Highcharts.dateFormat(dateformatlable.day, this.value);
}
}
}
},
showLastLabel: true

You can get selected unitName from tickPositionInfo and apply it in the label formatter:
xAxis: {
type: 'datetime',
labels: {
formatter: function() {
const format = {
second: '%Y-%m-%d<br/>%H:%M:%S',
minute: '%Y-%m-%d<br/>%H:%M',
hour: '%Y-%m-%d<br/>%H:%M',
day: '%Y<br/>%m-%d',
week: '%Y<br/>%m-%d',
month: '%Y-%m',
year: '%Y'
}[this.tickPositionInfo.unitName];
return Highcharts.dateFormat(format, this.value);
}
}
}

Highcharts chart date issue

It's the first time I use Highcharts and there is something missing, I'm sure.
I'm trying to translate its calendar months but it seems it doesn't work although everywhere I read this should be the best way.
Highcharts.setOptions({
lang: {
months: ['Janvier', 'Février', 'Mars', 'Avril', 'Mai', 'Juin',
'Juillet', 'Août', 'Septembre', 'Octobre', 'Novembre', 'Décembre']
}
});
var reviewAvgContainer = $('#reviewAvgcontainer');
reviewAvgContainer.highcharts({
credits : {
enabled: false
},
data: {
table: 'reviewAvgData'
},
chart: {
type: 'line'
},
title: {
text: reviewAvgContainer.data('title')
},
xAxis: {
type: 'datetime',
dateTimeLabelFormats: {
month: '%B'
}
},
yAxis: {
min : 0,
max: 10,
allowDecimals: false,
title: {
text: graphTrans.generalGraph['RATINGS']
}
}
});
The problem comes when I add xAxis: {, particularly type: 'datetime'. It seems it doesn't like it and the date appears completely disrupted as following:
Jan 00:00:00.001 00:00:00.002 00:00:00.003 00:00:00.004 00:00:00.005 00:00:00.006
Instead of Février to Août.
When I remove type: 'datetime' everything works but the months are not translated anymore
I have not a clue about what it is. Any idea?

Using hours value with HighCharts

I have some trouble with HighCharts, i can't figure out how to use hours. For now i manage to use day hours (00 to 24) but it stop at 24 and restart at 0 because HighCharts consider that a day is pass. I just want to have an hour value like 1h30 or 55h10 for example.
Here is my chart :
$('#chart2').highcharts({
chart: {
type: 'column',
plotBackgroundColor: null,
plotBorderWidth: 0,
borderWidth: 2,
borderRadius: 7,
borderColor: '#D8D8D8',
width:dialogWidth/2,
height:dialogWidth/2+50
},
title: {
text: 'Time Worked per Day'
},
xAxis: {
type: 'category'
},
yAxis: {
type: 'datetime', //y-axis will be in milliseconds
dateTimeLabelFormats: { //force all formats to be hour:minute:second
second: '%H:%M',
minute: '%H:%M',
hour: '%H:%M',
day: '%d %H:%M',
week: '%H:%M',
month: '%H:%M',
year: '%H:%M'
},
title: {
text: 'Hours'
}
},
credits: {
enabled: false
},
legend: {
enabled: false
},
plotOptions: {
series: {
borderWidth: 0,
dataLabels: {
enabled: true,
formatter: function() {
return Highcharts.dateFormat('%Hh%M',new Date(this.y));
}
}
}
},
tooltip: {
formatter: function() {
return '<b>' + this.series.name +' : </b>' +
Highcharts.dateFormat('%Hh%M',new Date(this.y));
}
},
series: [{
name: 'Hours',
colorByPoint: true,
data: datas
}]
});
Hope you can help.

You don't need to use datetime for figuring this out. Since what you want to know is the number of hours per day, based on a value in milliseconds from your JSON data, you need to treat that value as a number, not a date.
Here's how I solved this problem:
First, I changed how you described the labels in your y-axis. I dropped the datetime type and used the formatter function to show the labels as whole hours. I also defined a tickInterval to show the labels one hour apart from one another.
yAxis: {
labels: {
formatter: function() {
// show the labels as whole hours (3600000 milliseconds = 1 hour)
return Highcharts.numberFormat(this.value/3600000,0);
}
},
title: {
text: 'Hours'
},
tickInterval: 3600000 // number of milliseconds in one hour
},
Next, I updated the code in your tooltip. We're taking your y values and making them whole hours. I set the second parameter in Highcharts.numberFormat to "2" so your toolip values show up with two decimal places (such as "2.50" for two-and-one-half hours).
tooltip: {
formatter: function() {
return '<b>' + this.series.name +' : </b>' +
Highcharts.numberFormat(this.y/3600000,2);
}
},
You can see a working fiddle, based off the sample data you provided, here: http://jsfiddle.net/brightmatrix/kk7odqez/
Here's a screenshot I took of the chart in this fiddle, showing how both the labels and tooltip now appear:
Thank you for the additional information you provided in your comments. That really helped me puzzle this out and get you what I hope is a useful solution.

Correctly plot time series in Highcharts/Highstock

I have large collection of data in the format [1421065200000, 1.72], where the first parameter is time in milliseconds and the second parameter is the value at that specific time. I have data array consisting of such data in large size. Now I want scrollable graph containing plot of such time and value data. Here is my javascript implementation to do so,
var dataArray; //This contains my data array i.e. ([[t1, v1],[t2, v2],...])
var minDate = dataArray[0][0];
var maxDate = dataArray[dataArray.length - 1][0];
var chartOption = {
chart: {
type: graphType,
renderTo: 'graph-container',
zoomType: 'x',
useUTC: false
},
title: {
text: 'Data from last 24 hours'
},
credits : {
enabled: false
},
xAxis: {
title: {
text: null
},
type: 'datetime',
dateTimeLabelFormats: {
second: '%Y-%m-%d<br/>%H:%M:%S',
minute: '%Y-%m-%d<br/>%H:%M',
hour: '%Y-%m-%d<br/>%H:%M',
day: '%Y<br/>%m-%d',
week: '%Y<br/>%m-%d',
month: '%Y-%m',
year: '%Y'
},
allowDecimals: false,
ordinal: false,
min: minDate,
max: maxDate
},
yAxis: {
title: {
text: null
}
},
plotOptions: {
series: {
pointStart: minDate,
pointInterval: 5 * 60 *1000
}
},
series: [{
name: parameterName,
data: dataArray
}],
exporting: {
enabled: false
}
};
parameterChart = new Highcharts.Chart(chartOption);
}
The chart shows incorrect data, the time value on x-axis doesn't match the value at y-axis. What is the most correct and efficient to show such time series. Should I use Highcharts or Highstock. Please guide me through this, with suggestion or maybe with solution.

What I did was, I used HighStock instead of HighCharts (since I needed scrollbar along x-axis for large collection of data). I was passing the date in my local time zone format, whereas the chart was using UTC. So, I disabled the use of UTC (alternative: I could have provided data in UTC and drawn the graph using the same, In my case I needed my local labels). I gave the minimum and maximum range to the x-axis through x-axis min and max configuration. Here is the sample of my code,
//dataArray contains the array of data [[x1, y1], [x2, y2], ...]
//x is Date, y is temperature value (say)
var minDate = dataArray[0][0];
var maxDate = dataArray[dataArray.length - 1][0];
//Disable use of UTC
Highcharts.setOptions({
global: {
useUTC: false
}
});
//Create graph options
var chartOption = {
chart: {
type: graphType, //line, bar, column, etc
renderTo: 'graph-container', //div where my graph will be drawn
zoomType: 'x' //Making x-axis zoomable/scrollable
},
title: {
text: 'Data from last 6 hours'
},
subtitle: {
text: document.ontouchstart === undefined ?
'Click and drag in the plot area to zoom in' :
'Pinch the chart to zoom in'
},
xAxis: {
title: {
text: null
},
type: 'datetime', //For time series, x-axis labels will be time
labels: {
//You can format the label according to your need
format: '{value:%H:%m}'
},
min: minDate,
max: maxDate,
minPadding: 0.05,
maxPadding: 0.05
},
yAxis: {
title: {
text: null
}
},
scrollbar: {
enabled: true
},
series: [{
name: "Temperature", //Name of the series
data: dataArray
}],
exporting: {
enabled: false
},
credits : {
enabled: false
}
};
//Finally create the graph
var myChart = new Highcharts.Chart(chartOption);