Highcharts - Update a series point [x,y] values? - javascript

I'm trying to update a point[x,y] in the chart.
What's the problem?
Ok, I chart and its chart series are like this:
series: [
{
enableMouseTracking: false,
name: 'Line1',
type: 'line',
color: '#5d5d5d',
yAxis: 1,
data: [[12000, 55.068493], [15064, 42.842]],
marker: {
symbol: 'circle'
}
},
{
enableMouseTracking: false,
name: 'Line2',
type: 'line',
color: '#5d5d5d',
yAxis: 1,
marker: {
symbol: 'circle'
},
data: [[12000, 57.671527], [16000, 42.620069]]
},{
name: 'TOM',
//type: 'line',
color: '#ff4100',
yAxis: 1,
marker: {
symbol: 'url(icons/tom.png)'
},
data: [
{
id:'tom_point',
color: '#00FF00',
y: fi_variable,
x: tom_variable
}
]
}
Now the thing is that, I'm checking if fi_variable or tom_variable has changed and if its true, update these two variables, and finally update the chart.
I have tried already, some methods like chart.series[0].data[0].update(y = 10); and its working for some points with fixed x,y values, but no luck for the rest of the points.
For Instance I use chart.series[0].data[1].update(y = 10); will work ok,
but this chart.series[0].data[3].update(y = 10); will not work.
1- Is there any way to replace the data[0] from the above code line with an id of a point in our case tom_point ?
Also I've tried this chart.series[0].setData([[tom_variable,fi_variable, 'tom_point']]);
and again it wont working when the point is with an id or without fixed values.
But If I try chart.series[0]data[0].setData([[tom_variable,fi_variable]]); it works but again not on 3rd element (in our case - as shown above) of the series.
I can get the values for this point with the following,
var tomPoint = chart.get('tom_point').y;
but I can't set any x,y values back to chart and update it (the chart).
I have also tried to check if the variables have changed and to redraw the chart with chart.redraw but nothing.
Any Ideas how can I get this to work?
Am I losing something?
Thank you in Advance for your time.

First of all you try to update point (data[3]) which doens't exist in serie. Secondly in case when you update you need to use
chart.series[0].data[1].update(10); or chart.series[0].data[1].update({y:10}); but not yoru figure

if you want to change the x value also then use
chart.series[0].data[0].update({
x: 10,
y: 100
})
this will update both x and y values like in this example http://jsfiddle.net/DCA8W/
Hope this is what you are looking for.

Ok, the solution finally was simple.
I've managed to update the point:
The third element in the series with the name TOM corresponds to
chart.series[2].
{ // chart.series[2]
name: 'TOM',
//type: 'line',
color: '#ff4100',
yAxis: 1,
marker: {
symbol: 'url(icons/tom.png)'
},
data: [
{
id:'tom_point',
color: '#00FF00',
y: fi_variable,
x: tom_variable
}
]
}
So in order to update [x,y] values of this point, you have to do it like that:
// TOM Point
`chart.series[2].data[0].update({x:var_x, y:var_y});`

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[{
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In your example:
{
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http://i.imgur.com/iwk3pyO.png
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Upon converting to C3.JS, I encounter a problem with the x-values. The bar chart of C3.JS, by default, assigns values to each bar as 0, 1, 2, ... n instead of the values that I wanted which is the following:
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Instead of
regions: [
{start: 0, end: 1, class: 'red-color'}
]
You need to hack the end value according to how many items are less than 1 in your categories?. You code would be probably like this:
function fctGetItemLessThan1(xData){
//implement your count logic here + return value
}
then in your chart option:
...
regions: [
{start: fctGetItemLessThan1() - 1, end: fctGetItemLessThan1(), class: 'red-color'}
]
...
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enter link description here
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..
david
Use scatter serie, instead of line chart.
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type: 'scatter',
lineWidth: 2,
name: 'Litri Carburante Rimasti',
data: data,
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color: '#FF0000',
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My requirement is to draw first vertical line from when y value is 110.2 and 2nd line from when y value is 135.6 instead of starting from zero. i.e above the plot line only. Please suggest how can I achieve this? Thanks.
Considering the documentation it is unlikely that HighCharts supports this by default, as you are only allowed to associate a value of the current axis with the line.
You might need a preprocessing step that inverts you function to get the appropriate X values. Something like:
invert(data, Y) -> list of X values with data[X] = Y
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chart: {
events: {
load: function () {
var yMAx = this.yAxis[0].max;
console.log(yMAx);
this.addSeries({
data: [{
x: 4,
y: 110.2,
marker: {
symbol: 'triangle'
}
}, {
x: 4,
y: yMAx,
marker: {
symbol: 'triangle-down'
}
}, ],
showInLegend: false,
color: 'red',
marker: {
enabled: true
}
});
this.addSeries({
data: [{
x: 7,
y: 135.6,
marker: {
symbol: 'triangle'
}
}, {
x: 7,
y: yMAx,
marker: {
symbol: 'triangle-down'
}
}, ],
showInLegend: false,
color: 'red',
marker: {
enabled: true
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});
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Sample demo.

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Not possible out of the box, but as mentioned by Steve Gu achievable by scatter. You can even ignore the formatter and disable the marker alltogether:
{
series: [
{
type: 'scatter',
tooltip: {
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dataLabels: {
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enabled: true,
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}
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{
name: 'Outlier',
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data: [ // x, y positions where 0 is the first category
{
name: 'This is my label for the box',
x:0, //box index. first one is 0.
y:975 //it will be bigger than the maximum value of of the box
}
],
dataLabels : {
align: 'left',
enabled : true,
formatter : function() {
return this.point.name;
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},
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fillColor: 'white',
lineWidth: 0,
lineColor: 'white'
}
}
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Obviosuly you can reqest your suggestion in our user voice system http://highcharts.uservoice.com/

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