Develop Reference

Plotline (vertical line) in highcharts scatter chart

https://jsfiddle.net/7zL0v5oq/
I would like to have a plotline at today's date. The list can get quite long and in that case it helps with having an oversight. I fear it doesn't work because it is a scatter chart but I don't know what the problem is. I've searched all over the place but everything leads to plotlines, which clearly doesn't work. I would also be thankful if anyone knew, whether there was an easy way to filter my data the way I have it (standard highcharts filtering is deactivated but doesn't really help because of the static y values, so I get a huge, white space in the middle unless I filter at the edges. Thank you in advance for your help.
data = [{
"id": 1,
"release": "Software1",
"routine_failure_analysis_ended_on": null,
"sw_maintenance_releases_ended_on": "2014-04-01",
"sale_ended_on": "2013-04-01",
"security_vul_support_ended_on": "2015-04-01",
"service_contract_renewal_ended_on": null,
"svc_attach_ended_on": null,
"support_ended_on": "2018-03-31",
"updated_dates_on": "2012-10-03",
"created_at": "2018-05-04T18:53:21.301+02:00",
"updated_at": "2018-05-16T08:36:24.940+02:00"
},
{
"id": 2,
"release": "Software2",
"routine_failure_analysis_ended_on": null,
"sw_maintenance_releases_ended_on": "2019-07-24",
"sale_ended_on": "2017-07-31",
"security_vul_support_ended_on": "2020-07-24",
"service_contract_renewal_ended_on": null,
"svc_attach_ended_on": null,
"support_ended_on": "2022-07-31",
"updated_dates_on": "2015-08-14",
"created_at": "2018-05-05T04:00:44.170+02:00",
"updated_at": "2018-05-16T08:36:29.325+02:00"
},
{
"id": 3,
"release": "Software3",
"routine_failure_analysis_ended_on": null,
"sw_maintenance_releases_ended_on": "2018-03-01",
"sale_ended_on": "2017-03-01",
"security_vul_support_ended_on": "2018-12-01",
"service_contract_renewal_ended_on": null,
"svc_attach_ended_on": null,
"support_ended_on": "2022-02-28",
"updated_dates_on": "2016-09-02",
"created_at": "2018-05-05T04:00:44.401+02:00",
"updated_at": "2018-05-16T08:36:31.643+02:00"
}
];
const colors = ["#516", "#1781e3", "#25b252", "#20c997", "#ffc107", "#ff8b2e", "#dd1122"];
//Change to store y value paired to release/pid
var change = {};
//Which y values need to be displayed
var ticks = [0];
//Description of events
var sale = "Sale";
var support = "Support";
var svc = " SVC attach";
var sw = "Software maintenance";
var routine = "Routine failure analysis";
var service = "Service contract renewal";
var security = "Security vulnerability support";
//Data array for series
var high = [];
data.sort(function(a, b) {
return Date.parse(a.support_ended_on) < Date.parse(b.support_ended_on) ? 1 : -1
})
for (var i = 0; i < data.length; i++) {
var arr = [{
x: Date.parse(data[i].sale_ended_on),
y: (i + 1) * 20,
color: colors[0],
myValue: sale
},
{
x: Date.parse(data[i].sw_maintenance_releases_ended_on),
y: (i + 1) * 20,
color: colors[1],
myValue: sw
},
{
x: Date.parse(data[i].security_vul_support_ended_on),
y: (i + 1) * 20,
color: colors[2],
myValue: security
},
{
x: Date.parse(data[i].svc_attach_ended_on),
y: (i + 1) * 20,
color: colors[3],
myValue: svc
},
{
x: Date.parse(data[i].routine_failure_analysis_ended_on),
y: (i + 1) * 20,
color: colors[4],
myValue: routine
},
{
x: Date.parse(data[i].service_contract_renewal_ended_on),
y: (i + 1) * 20,
color: colors[5],
myValue: service
},
{
x: Date.parse(data[i].support_ended_on),
y: (i + 1) * 20,
color: colors[6],
myValue: support
}
];
var key, value;
line = [{
x: Date.parse(data[i].sale_ended_on),
y: (i + 1) * 20
}, {
x: Date.parse(data[i].support_ended_on),
y: (i + 1) * 20
}]
//Adding to change list, so we can add release/pid as label to y axis
key = (i + 1) * 20;
ticks.push(key);
if (data[i].pid) {
value = data[i].pid;
} else {
value = data[i].release;
}
change[key] = value;
//Expanding high (which is used for the highcharts series) with arr (all points for one pid)
if (data[i].pid) {
high.push({
label: data[i].pid,
name: data[i].pid,
type: 'scatter',
data: arr
}, {
type: 'line',
data: line,
linkedTo: ":previous"
});
} else {
high.push({
label: data[i].release,
name: data[i].release,
type: 'scatter',
data: arr,
showInLegend: false
}, {
type: 'line',
data: line,
linkedTo: ":previous"
});
}
}
Highcharts.chart("container", {
chart: {
height: data.length * 75
},
credits: {
enabled: false
},
yAxis: {
title: {
text: null
},
tickPositions: ticks,
visible: true,
labels: {
formatter: function() {
var value = change[this.value];
return value !== 'undefined' ? value : this.value;
}
}
},
xAxis: {
plotlines: [{
color: "#dd1122",
width: 2,
value: +new Date()
}],
type: 'datetime',
},
plotOptions: {
scatter: {
marker: {
symbol: 'circle',
radius: 7,
lineWidth: 2
}
},
line: {
enableMouseTracking: false,
marker: {
enabled: false
},
color: '#bbb',
lineWidth: 3
}
},
tooltip: {
formatter: function() {
var str = '<b>' + this.series.name + '</b><br/>'
if (this.point.myValue) {
str += this.point.myValue;
} else {
str += "Corrupted data!";
}
if (this.point.x < Date.parse(new Date))
return str += " ended on:<br/>" + Highcharts.dateFormat('%e %b %Y', new Date(this.x));
else
return str += " will end on:<br/>" + Highcharts.dateFormat('%e %b %Y', new Date(this.x));
},
shared: false
},
series: high
})

You have a typo, use plotLines instead of plotlines:
xAxis: {
plotLines: [{
...
}],
...
}
Live demo: https://jsfiddle.net/BlackLabel/p3u8ejtb/
API Reference: https://api.highcharts.com/highcharts/xAxis.plotLines

Changing xaxis label from echarts library

var data = [];
var dataCount = 10;
var startTime = +new Date();
var categories = ['categoryA', 'categoryB', 'categoryC'];
var types = [
{name: 'JS Heap', color: '#7b9ce1'},
{name: 'Documents', color: '#bd6d6c'},
{name: 'Nodes', color: '#75d874'},
{name: 'Listeners', color: '#e0bc78'},
{name: 'GPU Memory', color: '#dc77dc'},
{name: 'GPU', color: '#72b362'}
];
// Generate mock data
echarts.util.each(categories, function (category, index) {
var baseTime = startTime;
for (var i = 0; i < dataCount; i++) {
var typeItem = types[Math.round(Math.random() * (types.length - 1))];
var duration = Math.round(Math.random() * 10000);
data.push({
name: typeItem.name,
value: [
index,
baseTime,
baseTime += duration,
duration
],
itemStyle: {
normal: {
color: typeItem.color
}
}
});
baseTime += Math.round(Math.random() * 2000);
}
});
function renderItem(params, api) {
var categoryIndex = api.value(0);
var start = api.coord([api.value(1), categoryIndex]);
var end = api.coord([api.value(2), categoryIndex]);
var height = api.size([0, 1])[1] * 0.6;
var rectShape = echarts.graphic.clipRectByRect({
x: start[0],
y: start[1] - height / 2,
width: end[0] - start[0],
height: height
}, {
x: params.coordSys.x,
y: params.coordSys.y,
width: params.coordSys.width,
height: params.coordSys.height
});
return rectShape && {
type: 'rect',
shape: rectShape,
style: api.style()
};
}
option = {
tooltip: {
formatter: function (params) {
return params.marker + params.name + ': ' + params.value[3] + ' ms';
}
},
title: {
text: 'Profile',
left: 'center'
},
dataZoom: [{
type: 'slider',
filterMode: 'weakFilter',
showDataShadow: false,
top: 400,
height: 10,
borderColor: 'transparent',
backgroundColor: '#e2e2e2',
handleIcon: 'M10.7,11.9H9.3c-4.9,0.3-8.8,4.4-8.8,9.4c0,5,3.9,9.1,8.8,9.4h1.3c4.9-0.3,8.8-4.4,8.8-9.4C19.5,16.3,15.6,12.2,10.7,11.9z M13.3,24.4H6.7v-1.2h6.6z M13.3,22H6.7v-1.2h6.6z M13.3,19.6H6.7v-1.2h6.6z', // jshint ignore:line
handleSize: 20,
handleStyle: {
shadowBlur: 6,
shadowOffsetX: 1,
shadowOffsetY: 2,
shadowColor: '#aaa'
},
labelFormatter: ''
}, {
type: 'inside',
filterMode: 'weakFilter'
}],
grid: {
height:300
},
xAxis: {
min: startTime,
scale: true,
axisLabel: {
formatter: function (val) {
return Math.max(0, val - startTime) + ' ms';
}
}
},
yAxis: {
data: categories
},
series: [{
type: 'custom',
renderItem: renderItem,
itemStyle: {
normal: {
opacity: 0.8
}
},
encode: {
x: [1, 2],
y: 0
},
data: data
}]
};
Hi, everyone!! I am working on the echarts library, the only thing i want to change data is the axisLabel from Xaxis part.
What i mean is, for example, "2019-11-5, 2019-11-6...."and so on. So, i hope someone can help me out, thank you so much!!!
Hi, everyone!! I am working on the echarts library, the only thing i want to change data is the axisLabel from Xaxis part.
What i mean is, for example, "2019-11-5, 2019-11-6...."and so on. So, i hope someone can help me out, thank you so much!!!

First, create an array of dates like
var dates = ['2019-11-5','2019-10-3','2019-2-2','2019-1-4','2019-12-5'];
then in xAxis -> axisLabel return date
axisLabel: {
formatter: function (val,index) {
return dates[index];
}
}

HighCharts onClick get column data on Stacked Column Chart

I have a stacked Column chart which gives my a list of columns. Each column has a name.
What I need to is is to get the name of the column that has been clicked on.
I have a couple of alerts in the series section which is where I want to data to be called from.
Here is the code:
var chart;
$(function () {
$.ajax({
url: 'url here',
method: 'GET',
async: false,
success: function(result) {
themainData = result;
}
});
var mainData = [themainData];
var chlist=[];
var votList=[];
var comList=[];
for (var i = 0; i < mainData[0].cha.length; i++) {
var obj = mainData[0].cha[i];
var chlst = obj.name;
var vl = obj.sta.vot;
var cl = obj.sta.com;
chlist.push(chlst);
votList.push(vl);
comList.push(cl);
}
//var chlist = ['Ch 1', 'Ch 2', 'Ch 3', 'Ch 4'];
////var votList = [10, 9, 8, 7];
//var comList = [10, 9, 8, 7];
var chart = {
type: 'column',
};
var title = {
text: 'vot and com'
};
var xAxis = {
categories: chlist
};
var yAxis ={
min: 0,
title: {
text: 'cha'
},
stackLabels: {
enabled: true,
style: {
fontWeight: 'bold',
color: (Highcharts.theme && Highcharts.theme.textColor) || 'gray'
}
}
};
var legend = {
align: 'right',
x: -30,
verticalAlign: 'top',
y: 25,
floating: true,
backgroundColor: (Highcharts.theme && Highcharts.theme.background2) || 'white',
borderColor: '#CCC',
borderWidth: 1,
shadow: false
};
var tooltip = {
formatter: function () {
return '<b>' + this.x + '</b><br/>' +
this.series.name + ': ' + this.y + '<br/>' +
'Total: ' + this.point.stackTotal;
}
};
var plotOptions = {
column: {
stacking: 'normal',
dataLabels: {
enabled: true,
color: (Highcharts.theme && Highcharts.theme.dataLabelsColor) || 'white',
style: {
textShadow: '0 0 3px black'
}
}
}
};
var credits = {
enabled: false
};
var series= [{
name: 'vot',
data: votList,
events: {
click: function (event) {
alert('vot Here');
alert ('show: '+ this.cha +', value: '+ this.y);
}
}
}, {
name: 'com',
data: comList,
events: {
click: function (event) {
alert('com Here');
alert ('show: '+ this.cha +', value: '+ this.y);
}
}
}];
var json = {};
json.chart = chart;
json.title = title;
json.xAxis = xAxis;
json.yAxis = yAxis;
json.legend = legend;
json.tooltip = tooltip;
json.plotOptions = plotOptions;
json.credits = credits;
json.series = series;
$('#container').highcharts(json);
//end
});
How can I do this?

You can add column.point.click event callback function and inside this function alert points name using alert(this.name)
plotOptions: {
column: {
stacking: 'normal',
keys: ['x', 'y', 'name'],
point: {
events: {
click: function() {
alert(this.name)
}
}
}
}
},
Here you can find an example how it can work:
http://jsfiddle.net/grz4zaLc/1/

How to improve performance of Highcharts and avoid error 15 inspite of sorted data?

I am trying to create a gantt chart representation in highcharts with navigator. I get a JSON response from server (below is a typical response strucutre). In order to create a gantt chart representation I am creating a line between 2 points. Each point has a start_date and end_date and inorder to create this representation I am plotting a line between start_date and end_date of each point (which I have accomplished).
Response Structure from server
{
"took": 312,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 4115,
"max_score": 1,
"hits": [
]
},
"aggregations": {
"top-tags": {
"doc_count_error_upper_bound": 0,
"sum_other_doc_count": 0,
"buckets": [
{
"key": "Process1",
"doc_count": 6,
"process": {
"value": {
"1449878649000": {
"start_date": 1449878649000,
"process_initiator": "lol#surg.com",
"end_date": 1449878734000,
"total_seconds": 85
},
"1449879753000": {
"start_date": 1449879753000,
"process_initiator": "lol#surg.com",
"end_date": 1449879850000,
"total_seconds": 97
},
"1449881550000": {
"start_date": 1449881550000,
"process_initiator": "lol#surg.com",
"end_date": 1449881631000,
"total_seconds": 81
}
}
}
},
{
"key": "Process2",
"doc_count": 1,
"process": {
"value": {
"1449971262000": {
"start_date": 1449971262000,
"process_initiator": "lol#surg.com",
"end_date": 1449971266000,
"total_seconds": 4
}
}
}
}
]
}
}
}
Code also sharing a plunker demo
var app = angular.module('app', []);
app.directive('operationalhighstackstock', function() {
return {
restrict: 'E',
scope: true,
link: function postLink(scope, element, attrs) {
scope.$watch('operationHighChartsData', function(values) {
new Highcharts.StockChart(values);
});
}
};
});
//2014-11-30T18:15:25.000-08:00
app.controller('MainCtrl', ['$scope', function($scope) {
$scope.excludeValue = {
data: 0
};
$scope.isExcludeNeeded = true;
var opExcludeMinutes = 1,
AGENT_NAMES = "agent_names",
colorCodes = ["#8CC051", "#967BDC", "#5D9CEC", "#FB6E52", "#EC87BF", "#46CEAD", "#FFCE55", "#193441", "#193441", "#BEEB9F", "#E3DB9A", "#917A56"];
var setSummaryDisplay = function(e) {
if (e.min === null || e.max === null)
$scope.hideRangeSlider = true;
else
$scope.hideRangeSlider = false;
$scope.minimumSelectedValue = e.min;
$scope.maximumSelectedValue = e.max;
}
var getHichartsData = function(result) {
var tasksArr = [],
seriesArr = [],
userArr = [],
processArr = [];
var agentSeries = [],
agentData = {},
processSeries = [],
taskData = {},
idx = 0,
opProcessBucket = esResponse.aggregations["top-tags"].buckets,
seriesData = {};
var opBucketLength = opProcessBucket.length;
for (var opProcessBucketIndex = 0; opProcessBucketIndex < opBucketLength; ++opProcessBucketIndex) {
//opProcessBucket.forEach(function(processEntry) {
//if (opProcessBucket[opProcessBucketIndex]["key"] == $scope.gpDropDownTitle) {
var intervalBucket = opProcessBucket[opProcessBucketIndex]["process"]["value"], //opProcessBucket[opProcessBucketIndex]["top_tag_hits"]["hits"]["hits"],
intervalArr = [],
tasksIntervalArr = [],
opTaskidObj = {},
opTaskidIntervalObj = {},
process_name = null,
sortElementArr = [];
for (var key in intervalBucket) {
//intervalBucket.forEach(function(intervalEntry, intervalIndex) {
var intervalObj = {},
intervalObj2ndpoint = {},
processIntervalObj = {},
tintervalArr = [],
intervalIndex = 0,
start_temp = parseInt(key),
end_temp = intervalBucket[key].end_date; //start_temp = intervalBucket[key].start_date, end_temp = intervalBucket[key].end_date;
//added here since response contains null value and data load will take almost 1 date, verified with Bhavesh
$scope.currentDateTime = new Date().getTime();
if (end_temp == null)
end_temp = $scope.currentDateTime;
var st = new Date(moment(start_temp).valueOf()).getTime();
var et = new Date(moment(end_temp).valueOf()).getTime();
var duration = moment.duration(moment(et).diff(moment(st)));
var minutes = duration.asMinutes();
if (minutes > $scope.excludeValue.data && $scope.isExcludeNeeded) {
if (intervalIndex == 0 || process_name == null) {
process_name = opProcessBucket[opProcessBucketIndex]["key"];
processArr.push(opProcessBucket[opProcessBucketIndex]["key"]);
}
userArr.push(intervalBucket[key].process_initiator);
processIntervalObj["task_id"] = opProcessBucket[opProcessBucketIndex]["key"];
processIntervalObj["from"] = st;
var lFromtime = moment.utc(st).toDate();
lFromtime = moment(lFromtime).format('MM/DD/YY HH:mm');
var lTotime = moment.utc(et).toDate();
lTotime = moment(lTotime).format('MM/DD/YY HH:mm');
processIntervalObj["to"] = et;
processIntervalObj["color"] = "#FFCC4E";
processIntervalObj["fromDateString"] = lFromtime;
processIntervalObj["toDateString"] = lTotime;
processIntervalObj["process_initiator"] = intervalBucket[key].process_initiator == null ? 'Unknown' : intervalBucket[key].process_initiator;
processIntervalObj["total_seconds"] = intervalBucket[key].total_seconds;
//sortElementArr.push(intervalEntry["sort"][0]);
tasksIntervalArr.push(processIntervalObj);
}
}
opTaskidObj["name"] = process_name;
opTaskidIntervalObj["name"] = process_name;
opTaskidObj["data"] = [];
opTaskidIntervalObj["intervals"] = tasksIntervalArr;
opTaskidIntervalObj["intervals"] = tasksIntervalArr;
idx++;
if (tasksIntervalArr.length > 0) {
processSeries.push(opTaskidIntervalObj);
agentSeries.push(opTaskidObj);
}
//}
}
seriesData["title"] = "Test"; //item["key"];
var series = [];
(processSeries.reverse()).forEach(function(task, i) {
var item = {
name: task.name,
data: [],
turboThreshold: 1100000
};
(task.intervals).forEach(function(interval, j) {
item.data.push({
task_id: interval.task_id,
x: interval.from,
y: i,
from: interval.from,
to: interval.to,
color: interval.color,
fromDateString: interval.fromDateString,
toDateString: interval.toDateString,
total_seconds: interval.total_seconds,
process_initiator: interval.process_initiator
}, {
task_id: interval.task_id,
x: interval.to,
y: i,
from: interval.from,
to: interval.to,
color: interval.color,
fromDateString: interval.fromDateString,
toDateString: interval.toDateString,
total_seconds: interval.total_seconds,
process_initiator: interval.process_initiator
});
// add a null value between intervals
if (task.intervals[j + 1]) {
item.data.push([(interval.to + task.intervals[j + 1].from) / 2, null]);
}
});
series.push(item);
})
seriesData["data"] = series;
seriesData["tasks"] = processSeries;
seriesArr.push(seriesData);
return seriesArr;
}
$scope.agentSeriesData = getHichartsData(esResponse);
var tasks = $scope.agentSeriesData[0].tasks;
var seriesData = $scope.agentSeriesData[0].data;
var xAxisStepping = 1 * 3600 * 1000;
var chart = new Highcharts.StockChart({
chart: {
renderTo: 'container',
height: 600,
events: {
load: function(e) {
var max = this.xAxis[0].max;
var range = (24 * 3600 * 1000) * 7; // one day * 7
if ($scope.isInit || $scope.filterReseted) {
$scope.filterReseted = false;
this.xAxis[0].setExtremes(max - range, max);
}
setSummaryDisplay.call(this.xAxis[0], {
trigger: "navigator",
min: this.xAxis[0].min,
max: this.xAxis[0].max
});
}
}
},
title: {},
credits: {
enabled: false
},
xAxis: {
type: 'datetime',
gridLineWidth: 1,
tickInterval: xAxisStepping,
//ordinal:false,
dateTimeLabelFormats: {
month: '%b %e, %Y'
},
events: {
afterSetExtremes: setSummaryDisplay
},
minRange: 1000
},
yAxis: {
tickInterval: 1,
gridLineWidth: 1,
labels: {
enabled: false,
formatter: function() {
if (tasks[this.value]) {
return tasks[this.value].name;
}
}
},
startOnTick: false,
endOnTick: false,
title: {
text: 'Process'
}
},
animation: false,
rangeSelector: {
enabled: false
},
navigator: {
enabled: true
},
legend: {
enabled: false
},
tooltip: {
shared: false,
formatter: function() {
var str = '';
str += 'Process: ' + this.series.name + '<br>';
str += 'From: ' + Highcharts.dateFormat('%m/%d/%y %H:%M:%S', this.point.from) + '<br>';
str += 'To: ' + Highcharts.dateFormat('%m/%d/%y %H:%M:%S', this.point.to) + '<br>';
return str;
}
},
plotOptions: {
line: {
lineWidth: 10,
marker: {
enabled: false
},
dataLabels: {
enabled: false,
borderRadius: 5,
borderWidth: 1,
y: -6,
formatter: function() {
return this.series.name;
}
},
states: {
hover: {
lineWidth: 10
}
}
},
series: {
cursor: 'pointer',
animation: false,
point: {
events: {
click: function() {
$scope.selectedGuide = this.series.name;
//$scope.showTableView();
}
}
},
turboThreshold: 100000000,
dataGrouping: {
enabled: false
}
}
},
scrollbar: {
enabled: false
},
series: seriesData
});
$scope.operationHighChartsData = chart;
}]);
I have sorted data (ascending order) but I am still getting Highcharts error #15: www.highcharts.com/errors/15 errors in thousands (mostly 80k +), which is hanging the browser.
What could be the issue and how can I get rid of it and increase performance? Sharing a plunker which has code and relatively small number of errors.
Note: I am using Highstock JS v2.1.5

There are two problems with this code:
First thing you need to sort the series in ascending order of X. I did not want to debug your code on how do you construct your data so I added a simple loop in the end to sort everything.
for (var i in seriesData) {
seriesData[i].data.sort(function(a, b) {
if (a.x > b.x) {
return 1;
}
if (b.x > a.x) {
return -1;
}
return 0;
});
}
The other problem is that the data array contains in correct data because of this line
if (task.intervals[j + 1]) {
item.data.push([(interval.to + task.intervals[j + 1].from) / 2, null]);
}
so I changed it to this
// add a null value between intervals
if (task.intervals[j + 1]) {
item.data.push({
task_id: interval.task_id,
x: (interval.to + task.intervals[j + 1].from) / 2,
y: null,
from: (interval.to + task.intervals[j + 1].from) / 2,
to: (interval.to + task.intervals[j + 1].from) / 2
});
}
here is the fixed plnkr
http://plnkr.co/edit/OEMuVfTMhHNQsTYGUyuy?p=preview

Please read this link to improve highcharts performance. A few months ago Highcharts released boost.js to improve chart performance with millions of data points.

Highcharts : yAxis, values rounded to a maximum of two decimal places

The code of my graph is this (take data from a php page and then adds some series):
$('#grafico_1').highcharts({
chart: {
type: 'line',
zoomType: 'xy',
animation : false,
events: {
selection: function(event) {
if(event.resetSelection){
setTimeout(function(e){
var chart = $('#grafico_1').highcharts();
var extreme = chart.yAxis[0].getExtremes();
var mio_min = parseFloat(proprieta_temperatura_aperto[34]);
var mio_max = parseFloat(proprieta_temperatura_aperto[35]);
if(extreme.dataMin < mio_min){
mio_min = extreme.dataMin;
}
if(extreme.dataMax > mio_max){
mio_max = extreme.dataMax;
}
chart.yAxis[0].setExtremes(mio_min,mio_max);
$("#temperatura_min_max_rilevato").html("Min "+extreme.dataMin+"°C - Max "+extreme.dataMax+"°C");
//console.log("zoom - ");
}, 10);
}else{
setTimeout(function(e){
var chart = $('#grafico_1').highcharts();
var extreme = chart.yAxis[0].getExtremes();
$("#temperatura_min_max_rilevato").html("Min "+extreme.dataMin+"°C - Max "+extreme.dataMax+"°C");
//console.log("zoom + "+JSON.stringify(extreme));
}, 50);
}
}
},
},
credits : {
enabled : false
},
title: {
text: 'Grafico di Oggi'
},
xAxis: {
type: 'datetime',
title: {
text: false
}
},
yAxis: [
{
title: {
text: false
},
labels: {
format: '{value}°C',
},
//ceiling : parseFloat(proprieta_temperatura_aperto[35]),
//floor: parseFloat(proprieta_temperatura_aperto[34]),
max : parseFloat(proprieta_temperatura_aperto[35]),
min: parseFloat(proprieta_temperatura_aperto[34]),
},
{
title: {
text: false
},
min: 0,
max : 1,
ceiling:1,
floor : 0,
//tickLength : 1,
opposite: true,
tickInterval: 1,
labels: {
formatter: function() {
if (this.value == 0 || this.value == 1){
return this.value;
}else{
return null;
}
}
}
}
],
tooltip: {
formatter: function() {
var s = '<b>Data</b> '+Highcharts.dateFormat('%H:%M:%S', this.x) + '<br><b>Temperatura</b> ' + this.y + '°C<br/>';
$.each(this.points, function(i, point) {
if(point.series.name != "Temperatura"){
s += '<b>' + point.series.name +'</b> : '+ point.y + '<br>';
}
});
return s;
},
shared: true,
backgroundColor: '#FCFFC5'
},
plotOptions: {
line : {
turboThreshold: 0,
},
series: {
animation: false,
marker: {
enabled: false
}
}
},
series: []
});
the problem occurs when run one (or more) zoom on the graphs , and on the y-axis the values ​​are listed with more than two decimal places. I would like to limit to two the maximum number of decimal places.
I think i have to change this field (format)
yAxis: [
{
labels: {
format: '{value}°C',
},
but I do not know how.

Try to write the value as {value:.2f}, as proposed here: link