I have a file .json and I want get only the last 10 objects from this json file using graph hightcharts.
My problem is that script is getting full objects from array, and I want only get the last 10 objects...
Fixed.
My code is this:
<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
<script src="https://code.highcharts.com/highcharts.js"></script>
<div id="container"></div>
<script>
$.getJSON('https://cdn.rawgit.com/highcharts/highcharts/057b672172ccc6c08fe7dbb27fc17ebca3f5b770/samples/data/usdeur.json',
function (data) {
var currentValue = 0.9345;
Highcharts.chart('container', {
chart: {
zoomType: 'x'
},
title: {
text: 'USD to EUR exchange rate over time'
},
subtitle: {
text: document.ontouchstart === undefined ?
'Click and drag in the plot area to zoom in' : 'Pinch the chart to zoom in'
},
xAxis: {
type: 'datetime'
},
yAxis: {
title: {
text: 'Exchange rate'
},
plotLines: [{
value: currentValue,
color: 'green',
dashStyle: 'Dot',
width: 1,
label: {
text: currentValue,
textAlign: 'left',
x: -45
}
}]
},
legend: {
enabled: false
},
plotOptions: {
area: {
fillColor: {
linearGradient: {
x1: 0,
y1: 0,
x2: 0,
y2: 1
},
stops: [
[0, Highcharts.getOptions().colors[0]],
[1, Highcharts.Color(Highcharts.getOptions().colors[0]).setOpacity(0).get('rgba')]
]
},
marker: {
radius: 2
},
lineWidth: 1,
states: {
hover: {
lineWidth: 1
}
},
threshold: null
}
},
series: [{
type: 'area',
name: 'USD to EUR',
data: data
}]
});
}
);
</script>
Will be great if anyone can help me :)
Well it's quite simple, to get only the last 10 items of your json array, you can filter it, based on index, using Array.filter() method like this:
var last10 = data.filter(function(el, index) {
return index >= data.length - 10;
});
You just need to filter items that has the last 10 indexes, using index >= data.length - 10.
Demo:
In your situation you just need to filter the data array and pass the new filtered array to the chart:
<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>
<script src="https://code.highcharts.com/modules/export-data.js"></script>
<div id="container" style="min-width: 310px; height: 400px; margin: 0 auto"></div>
<script>
$.getJSON(
'https://cdn.rawgit.com/highcharts/highcharts/057b672172ccc6c08fe7dbb27fc17ebca3f5b770/samples/data/usdeur.json',
function(data) {
var last10 = data.filter(function(el, index) {
return index >= data.length - 10;
});
Highcharts.chart('container', {
chart: {
zoomType: 'x'
},
title: {
text: 'USD to EUR exchange rate over time'
},
subtitle: {
text: document.ontouchstart === undefined ?
'Click and drag in the plot area to zoom in' : 'Pinch the chart to zoom in'
},
xAxis: {
type: 'datetime'
},
yAxis: {
title: {
text: 'Exchange rate'
}
},
legend: {
enabled: false
},
plotOptions: {
area: {
fillColor: {
linearGradient: {
x1: 0,
y1: 0,
x2: 0,
y2: 1
},
stops: [
[0, Highcharts.getOptions().colors[0]],
[1, Highcharts.Color(Highcharts.getOptions().colors[0]).setOpacity(0).get('rgba')]
]
},
marker: {
radius: 2
},
lineWidth: 1,
states: {
hover: {
lineWidth: 1
}
},
threshold: null
}
},
series: [{
type: 'area',
name: 'USD to EUR',
data: last10
}]
});
}
);
</script>
Related
High everyone,
I am trying to get two things to happen. First, I want to create a custom tooltip for a columnrange-type series where the tooltip shows something like HIGH: 'this.point.high' and on a new line "LOW:" 'this.point.low'. Second, I would like these 'low' and 'high' values to populate a form field dynamically. For example, when a user drags the high value for the columnrange entry, I want this to dynamically update a number in the corresponding formfield that collects user input.
Here is a fiddle: https://jsfiddle.net/e9zqmy12/
Code:
<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/highcharts-more.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>
<script src="https://code.highcharts.com/modules/export-data.js"></script>
<script src="https://code.highcharts.com/modules/accessibility.js"></script>
<script src="https://code.highcharts.com/modules/draggable-points.js"></script>
<figure class="highcharts-figure">
<div id="container"></div>
</figure>
var myChart;
Highcharts.setOptions({
plotOptions: {
series: {
animation: false
}
}
});
// draw chart
myChart = Highcharts.chart('container',
{
chart: {
type: "line",
events: {
click: function (e) {
// find the clicked values and the series
var y = Math.round(e.yAxis[0].value),
x=12
series = this.series[3].data[12];
series.update({x, y, color: 'blue'});
},
drag: function (e) {
var y = Math.round(e.yAxis[0].value),
x=12
series = this.series[3].data[12];
series.update({x, y, color: 'blue'});
}
}
},
title: {
text: "Forecasting History"
},
xAxis: {
type: 'category',
allowDecimals: true,
title: {
text: "Quarter"
},
plotBands: [{
color: 'rgba(204,153,255,0.2)', // Color value
from: 11.5, // Start of the plot band
to: 12.5, // End of the plot band
label: {
text: 'Forecast'
}
}]
},
yAxis: {
title: {
text: "Inflation (%)"
},
plotLines: [{
value: 0,
width: 2,
color: '#aaa',
zIndex: 10
}]
},
tooltip: {
style: {
color: 'black',
fontWeight: 'bold',
fontSize: 13
},
positioner: function () {
return { x: 80, y:0 };
},
shared: true,
headerFormat: '',
valueDecimals: 2,
shadow: false,
borderWidth: 2,
borderColor: '#000000',
shape: 'rect',
backgroundColor: 'rgba(255,255,255,0.8)'
},
series: [
{
name: 'Inflation',
data: [3.9,4.98,5.72,5.73,3.61,3.68,3.72,2.64,2.1,1.94,1.99,1.87,null],
tooltip: {
pointFormat: '{series.name}: <b>{point.y}%</b><br/>',
},
},{
name: 'Central Bank Forecast',
data: [2,3.47,4.2,4.62,4.51,3.079,3.13,3.15,2.43,2.17,1.7,2.17,null],
tooltip: {
pointFormat: '{series.name}: <b>{point.y}%</b><br/>',
},
},{
name: 'Your Forecast',
showInLegend: false,
data: [null,null,null,null,null,null,null,null,null,null,null,null,2],
tooltip: {
pointFormat: '{series.name}: <b>{point.y}%</b><br/>',
},
marker: {
radius: 2.5,
fillColor: 'red'
},
},{
plotOptions: {
columnrange: {
dataLabels: {
enabled: true,
}
}
},
name: 'Forecast Range',
color: 'rgba(255,0,0,.1)',
type: 'columnrange',
data: [[12,1,3]],
tooltip: {
pointFormatter: function() {
console.log(this);
return "LOW: "+this.point.low + " HIGH:" +this.point.high;
}
},
dragDrop: {
draggableY: true,
groupBy: 'GroupId',
dragMinY: -10,
dragMaxY: 10,
dragPrecisionY: .01,
liveRedraw: false
},
}
],
});
It seems that your code was almost good except this callback pointFormatter callback - notice that this calls for point already, so this.point refers to undefined, it should be:
tooltip: {
pointFormatter: function() {
console.log(this);
return "LOW: " + this.low + " <br>HIGH:" + this.high;
}
},
Demo: https://jsfiddle.net/BlackLabel/vbo6j9em/
I use Highcharts 4.2.3 to create a chart for linear regression. I am following this demo:
http://jsfiddle.net/gh/get/library/pure/highcharts/highcharts/tree/master/samples/highcharts/demo/combo-regression/
This is the code in the demo:
Highcharts.chart('container', {
xAxis: {
min: -0.5,
max: 5.5
},
yAxis: {
min: 0
},
title: {
text: 'Scatter plot with regression line'
},
series: [{
type: 'line',
name: 'Regression Line',
data: [[0, 1.11], [5, 4.51]],
marker: {
enabled: false
},
states: {
hover: {
lineWidth: 0
}
},
enableMouseTracking: false
}, {
type: 'scatter',
name: 'Observations',
data: [1, 1.5, 2.8, 3.5, 3.9, 4.2],
marker: {
radius: 4
}
}]
});
I am trying to hide the series name Observations in tooltips for the scatter plot, but failed to make it work. I am not sure where to put this code:
tooltip: {
formatter: function() {
return this.x + ', ' + this.y;
}
}
The key is to have a tooltip formatter function that returns just this.x + ', ' + this.y.
See the Tooltip Documentation for reference. Demo below.
Highcharts.chart('container', {
xAxis: {
min: -0.5,
max: 5.5
},
yAxis: {
min: 0
},
title: {
text: 'Scatter plot with regression line'
},
series: [{
type: 'line',
name: 'Regression Line',
data: [[0, 1.11], [5, 4.51]],
marker: {
enabled: false
},
states: {
hover: {
lineWidth: 0
}
},
enableMouseTracking: false
}, {
type: 'scatter',
name: 'Observations',
data: [1, 1.5, 2.8, 3.5, 3.9, 4.2],
marker: {
radius: 4
}
}],
tooltip: {
formatter: function() {
return this.x + ', ' + this.y;
}
},
});
<html>
<body>
<script src="https://code.highcharts.com/highcharts.js"></script>
<div id="container"></div>
</body>
</html>
I am new to HighCharts and I am trying to display 2 graphs on the same x-axis) axis like shown here: http://jsfiddle.net/gh/get/library/pure/highcharts/highcharts/tree/master/samples/highcharts/demo/combo-multi-axes/.
However, I get an error message: This error happens when you set a series' xAxis or yAxis property to point to an axis that does not exist.
The error occurs in "chart1"
The html and JAVASCRIPT code is as follows:
$(function updat() {
var url = "https://xpm4zyor39.execute-api.us-west-2.amazonaws.com/prod/entries";
var humid = [],
date = [],
high=[],
day=[],
chanceOfRain=[],
humid_final = [],
day_final=[],
high_final=[],
chanceOfRain_final=[]
$.getJSON(url, function (json) {
$(json['Items']).each(function(i, data) {
//Store indicator name
// fill the date array
humid.push(data.humidity);
// fill the string data array
date.push(data.Date);
high.push(data.high);
day.push(data.Day);
chanceOfRain.push(data.chanceOfRain);
});
console.log(date);
// query send string that we need to convert into numbers
for (var i = 0; i < humid.length; i++) {
if (humid[i] != null) {
humid_final.push(parseFloat(humid[i]));
high_final.push(parseFloat(high[i]));
day_final.push(parseFloat(day[i]));
chanceOfRain_final.push(parseFloat(chanceOfRain[i]));
} else {
humid_final.push(null)
};
}
console.log("day_final", day_final);
var chart = new Highcharts.chart({
chart: {
type: 'spline',
renderTo: 'light',
marginBottom: 200
},
title: {
text: 'indicatorName'
},
tooltip: {
valueDecimals: 2,
pointFormat: '<span style="color:{point.color}">\u25CF</span> {series.name}: <b>{point.y}%</b><br/>'
},
plotOptions: {
series: {
marker: {
enabled: false
}
}
},
subtitle: {
text: 'Ambient Light Level'
},
xAxis: {
categories: day_final //.reverse() to have the min year on the left
},
series: [{
name: 'light level',
data: high_final //
}]
});
var chart1= Highcharts.chart('temp&humid',{
chart: {
zoomType:'xy'
},
title:{
text:'Humidity and temperature'
},
xAxis:{
categories: [1,2,3],
crosshair: true
},
yAxis: [{
labels:{
format: '{value}°C',
style: {
color: Highcharts.getOptions().colors[2]
}
},
title:{
text: 'Temperature',
style:{
color: Highcharts.getOptions().colors[2]
}
},
opposite: true
},
{ //secondary Y AXIS
gridLineWidth: 0,
title:{
text: 'Humidity',
style:{
color: Highcharts.getOptions().colors[0]
}
},
labels:{
format: '{value}%',
style:{
color:Highcharts.getOptions().colors[0]
}
}
}]
,
tooltip:{shared:true},
legend:{
layout: 'vertical',
align:'left',
x:80,
verticalAlign: 'top',
y: 55,
floating:true,
backgroundColor: (Highcharts.theme && Highcharts.theme.legendBackgroundColor) || '#FFFFFF'
},
series:[{
name:'Humidity',
type: 'column',
yAxis:1,
data:[12,3],
tooltip:{valueSuffix: ' %'}
},
{
name:'Temperature',
type:'spline',
yAxis:2,
data: [1,2,3],
tooltip:{valueSuffix: ' °C'}
}]
});
}); //getJSON method
setTimeout(updat, 3000);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>
<script src= "Ag.js"></script>
<div id="light" style="min-width: 310px; height: 400px; left:10px"></div>
<div id="temp&humid" style="min-width: 310px; height: 400px; left:10px"></div>
You are doing the following:
series:[{
yAxis:1,
},
{
yAxis:2,
}]
You need to do:
series:[{
yAxis:0,
},
{
yAxis:1,
}]
The problem is that axes start indexing at 0. So your index where you set temperature to axis 2 does not work because there is no axis 2. In the demo there are 3 axes, which is why it works with these definitions.
I am creating a chart and have so far found that a scatter and errorbar combination chart is the best fit. I have hit a problem when adding an extra pair of series that because I have used a scatter, that they are placed on top of each other.
This is the standard view for the chart which is correct:
This is what I WANT to happen when I add an extra pair of series data:
But this is what happens:
var chart;
$(function () {
$('#container').highcharts({
title: {
text: 'Chart'
},
tooltip: {
enabled: false
},
xAxis: [{
categories: ['Col1', 'Col2', 'Col3']
}],
yAxis: [{ // Primary yAxis
title: {
text: 'Chart'
}, opposite: true
}
, { // Secondary yAxis
title: {
text: 'Score'
}
}],
plotOptions: {
scatter: {
dataLabels: {
enabled: true,
x: 0,
y: 10
},
enableMouseTracking: false
},
errorbar: {
dataLabels: {
enabled: true
},
enableMouseTracking: false
}
},
series: [{
name: 'Value',
type: 'scatter',
yAxis: 1,
data: [1001.418, 1000.006, 1005.237],
dataLabels: {
backgroundColor: Highcharts.getOptions().colors[0],
padding: 3,
color: '#ffffff',
style: {
"textShadow": "none",
"lineHeight": "13px"
},
useHTML:true
},
marker: {
symbol: "square"
},
}, {
type: 'errorbar',
whiskerColor: '#555',
stemColor: '#555',
yAxis: 1,
data: [[1000.46, 1002.376], [999.071, 1000.941], [1002.753, 1007.721]]
},
//START extra data
{
name: 'Compare',
type: 'scatter',
yAxis: 1,
data: [1001.918, 1000.506, 1005.737],
dataLabels: {
backgroundColor: Highcharts.getOptions().colors[1],
padding: 3,
style: {
"textShadow": "none",
"lineHeight": "13px"
},
useHTML:true
},
marker: {
symbol: "square"
},
}, {
type: 'errorbar',
whiskerColor: '#555',
stemColor: '#555',
yAxis: 1,
data: [[1001.46, 1003.376], [1000.071, 1001.941], [1003.753, 1006.721]]
},
//END extra data
{
//force the ErrorBar icon into the legend
name: 'ErrorBar',
type: 'scatter',
marker: {
symbol: "url(data:image/gif;base64,R0lGODlhDwAMAIAAAFVVVf///yH5BAEHAAEALAAAAAAPAAwAAAIXhI8ZywEN4Yt0UnmjzWtzn4GXWFXJeRQAOw==)"
},
data:[null]
}
]
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script src="http://code.highcharts.com/highcharts.js"></script>
<script src="http://code.highcharts.com/highcharts-more.js"></script>
<div id="container" style="min-width: 310px; height: 400px; max-width: 800px; margin: 0 auto"></div>
http://jsfiddle.net/ewurrLgk/
I have taken a look through the API and I have tried to use other chart types like Line and Column and although they do align correctly, the error bar pretty much disappears because those chart types start from zero. I've also tried pointPlacement but that just moves them both into the middle. Is what I am trying to do just not possible using a scatter?
You should use pointPlacement, but set per particular series. I prepared a minified demo for you:
series: [{
type: 'scatter',
pointPlacement:-0.2,
data: [51,73]
},{
type: 'scatter',
pointPlacement:0.2,
data: [8,7.6]
},{
type: 'errorbar',
pointPlacement:-0.2,
data: [[48, 51], [68, 73]]
}, {
type: 'errorbar',
pointPlacement:0.2,
data: [[6, 8], [5.9, 7.6]]
}]
http://jsfiddle.net/6e749xx9/1/
I am using Highstock to visualize some data for my web application.
The data is displayed as steps (that is one value is held until a new one takes over), however the navigator of Highstock seems to use the spline algorithm on the data. I would rather like it to display as "blocks" like the main chart.
I have tried adding step: "true" to navigator.series in the options, but it does not seem to matter.
Does anyone know a way to do this with the Highstock API? I have been digging into the documentation for a while without any luck.
Code used to initialize highstock chart:
$('#container').highcharts('StockChart', {
rangeSelector: {
inputEnabled: true,
selected: 0,
buttons: [{
type: 'day',
count: 1,
text: 'Day'
}, {
type: 'week',
count: 1,
text: 'Week'
}]
},
series: [{
name: 'Light level',
data: data,
type: 'area',
step: true,
threshold: null,
tooltip: {
valueDecimals: 2
},
fillColor: {
linearGradient: {
x1: 0,
y1: 0,
x2: 0,
y2: 1
},
stops: [
[0, "#fff800"],
[1, Highcharts.Color("#fff800").setOpacity(0).get('rgba')]
]
}
}],
yAxis: {
labels: {
formatter: function () {
if (this.value > 0) return "" + this.value + "%";
return "";
}
},
plotLines: [{
value: 0,
color: 'green',
dashStyle: 'shortdash',
width: 2,
label: {
text: '0%',
align: "right"
}
}, {
value: 100,
color: 'red',
dashStyle: 'shortdash',
width: 2,
label: {
text: '100%',
align: "right"
}
}],
tickPositions: [0, 25, 50, 75, 100]
},
credits: {
enabled: false
},
navigator: {
//enabled: false
}
});
I have also created a jsfiddle with example data.
http://jsfiddle.net/EJZ5x/
According to docs - step option isn't supported.
However, when you set directly type for navigator, it works! See: http://jsfiddle.net/EJZ5x/1/
navigator: {
series: {
type: 'area',
step: 'left'
}
}