I'd like to make a histogram of huge amount of data using highcharts.js .
The default chart.histogram like https://www.highcharts.com/demo/histogram does not meet my needs, because I want to aggregate the data myself using BigQuery.
So the input data would be [[0, 123], [10, 1234], [20, 12345], ... , [90, 1234]] .
Can I use bar chart as histogram by tweaking the options?
Or is there any easier way to make histogram from already aggregated data like above?
I think simply inputting the data into bar chart does not work as histgram, in terms of styling of the chart.
Can I use bar chart as histogram by tweaking the options?
Sure! Columns accept data array like that, following the author comment the data must be separated :
var bigQueryData = [[0, 123], [10, 420], [20, 650], [30, 712], [40, 1020], [50, 1300], [60, 900], [70, 681], [80, 351], [90, 220]];
var xAxisCat = [],
realData = [];
bigQueryData.forEach(data =>{
xAxisCat.push( (data[0]).toString() );
realData.push( data[1] );
});
...
xAxis:{
title: { text: 'Histogram' },
type:'category',
categories: xAxisCat
},
...
series: [{
name: 'custom Histogram',
type: 'column',
data: realData,
}]
Updated Fiddle
Related
I have an array of objects that I want to display in highcharts. Every object has a name and a value.
I have tried to get this to work by doing
var objects = objectArray[]; // objectArray being an array of the objects I want data on
var objectNames = nameArray[]; // This being an array of all the names of the objects
var objectValues = valueArray[]; // An array of all the values of the objects
series: [{
data: objects.value,
name: objects.name
}]
This blew up on me. So I tried building the series like this:
series: [{
data: objectValues,
name: objectNames
}]
This gave me data for the values, but the name was all of the names in the objectNames array... for every single piece of data. so I tried using
series: [{
data: objectValues
},
{
data: objectNames
}]
This resulted in seeing the chart for the objectValues, and in the legend, another option for the names - which is completely unacceptable because there's no point in having a series of labels, right?
So I decided I would programmatically build out a series, using a foreach loop and then pass that into the constructor. However, http://www.highcharts.com/docs/getting-started/how-to-set-options/ says this is "bad code".
What I'm wanting is to be able to pass an array of objects to highcharts, tell it that every piece of data's 'name' is going to be the name value on that particular object, and the data is going to be tied to that particular object's value field. Is there a way to do this? Or is the only option what highcharts considers 'bad'?
So I found a solution.
After getting the data, I did
$.each(item, function (index, value) {
objects.push([value.name, value.value]);
});
And then bound my series with
series: [{
data: objects,
name: 'Value Type Description'
}]
So I have "Value Type Description" in the legend, but when I hover over a specific point I have the name as the label, and valid data displaying in graph form.
I found at http://api.highcharts.com/highcharts#series that if you have an array of two dimensional arrays, you can just pass a string as the first parameter and it would parse it as the label for that point.
EDIT: Example per request.
So you have two pieces to the series field, data and name. Name does NOT apply to the data, that will be the name of the axis.
So data is an array of key/value pairs.
data: [
{[key1, value1]},
{[key2, value2]},
{[key3, value3]}
]
And name is what the "main" label will be - "My Data Stuff" for example.
Then, when you load the chart, in the legend it should say "My Data Stuff", but when you hover over a specific point, say the first one, it will display the Key1 Value1 information.
data: [{
name: 'Point 1',
y: 1,
test1:9,
test2:'ddaf'
}, { -------> right
name: 'Point 2',
y: 5,
test1:12,
test2:'ddddaf'
}]
data: [{
my_name: 'Point 1',
y: 1,
test1:9,
test2:'ddaf'
}, { -------> we change 'name' to 'my_name',
my_name: 'Point 2', then the name you want to show become
y: 5, 'Slice', instead of 'Point 1','Point 2'
test1:12,
test2:'ddddaf'
}]
data: [{
my_name: 'Point 1',
my_y: 1,
test1:9,
test2:'ddaf'
}, { -------> Now,we get nothing.
my_name: 'Point 2',
my_y: 5,
test1:12,
test2:'ddddaf'
}]
So,the 'name' and 'y' is the key.
I'm trying to specify column charts with objects for points. The reason for this is that I don't have to then split up the array of objects into separate arrays of categories and values.
I have tried the following, but neither works. (I'm interested in both specifying the category for columns, and specifying datetimes for x values.)
var data_1 = [
{x:new Date('2013-01-03'),y:2},
{x:new Date("2013-01-02"),y:6},
{x:new Date("2013-01-01"),y:4},
];
var data_2 = [
{category: "a", y: 3},
{category: "b", y: 3},
{category: "c", y: 4}
];
var create_chart = function(el, data){
var init_obj = {
chart: {
type: 'column'
},
series: [{
name: 'a',
data: data
}]
};
el.highcharts(init_obj);
};
create_chart($('#chart1'), data_1);
create_chart($('#chart2'), data_2);
In highcharts configuration you can set onyl one type of one xAxis. If xAxis has datetime type, you cannot use categoires. Only wayt o common both types is use two xAxis with different types.
How can we get next elements name in Highcharts
for example
series: [{ name: 'weight', data: [50, 48, 80, 70]},
{ name: 'height',data: [5.8, 5.1, 6.1, 6.0]}
]
tooltip: {
formatter: function(){
return this.series.name;//i want to return here next elements name also is there any way
}
}
in the above tooltip iam returning only current element name, is there any way to get immediate next elements name there..?
You can always use shared tooltip, take a look: http://api.highcharts.com/highcharts#tooltip.shared
series: [{
type: 'flags',
name: 'Flags on axis',
data: [{
x: Date.UTC(2011, 2, 1),
title: 'A'
}, {
x: Date.UTC(2011, 5, 1),
title: 'C'
}],
shape: 'squarepin'
}]
$("#btnAddFlag").click(function () {
chart.series[0].setData(
{
x: Date.UTC(2011, 2, 1),
title: 'B'
});
});
Above code is part of highstock chart option and I want to add flag based on user event click. However I able to add the new point flag into the chart but the existing flags which title A and C will be missed out.
how can I add the new flag into the chart with the existing flags ?
On the other hand, I am able get the flag data but I'm unsure to
generate the correct data structure and reinitialize the old and new
flag data back into the chart.
Thank you.
Use addPoint instead of setData.
http://api.highcharts.com/highstock#Series.addPoint()
$("#btnAddFlag").click(function () {
chart.series[0].addPoint({
x: Date.UTC(2011, 2, 1),
title: 'B'
});
});
How do I display the date on my x axis from a json object structured like so;
[
[
634420512000000000,
100000
],
[
634421376000000000,
100086
],
[
634422240000000000,
100171
],
[
634423104000000000,
100257
]
]
Where my date is in milliseconds. I have set my xAxis like so;
xAxis: {
title: {
text: 'Time'
},
type: 'datetime'
}
Highcharts accepts three primary formats for data:
A simple array (e.g. [1, 2, 3])
An array of arrays of x, y pairs (e.g. [[x, y], [x2, y2]])
A list of point objects
Further details on these formats can be found in the highcharts documentation. However, in your case, it should be quite easy. Just do something like the following.
var data = []; //assume data is the array you've listed in your question
var chart = new Highcharts.chart({
xAxis: {
title: {
text: 'Time'
},
type: 'datetime'
},
series: [{
data: data
}]
});
Turns out I was returning ticks instead of milliseconds from 1/1/1970
So...
Dim dt1970 As DateTime = New DateTime("1970", "1", "1")
Dim d As DateTime = row("myDateFromDB")
Dim span As TimeSpan = d - dt1970
Dim milli as long = span.TotalMilliseconds