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.
Related
Full example:
https://jsfiddle.net/gbeatty/4byg0p2t/
data: {
table: 'datatable',
startRow: 0,
endRow: 6,
startColumn: 0,
endColumn: 3,
parsed: function (columns) {
columns.forEach(column => {
column.splice(1, 2);
});
}
},
What I'd like the chart to reference is only column 0 "Year" and column 3 "Group C" while keeping the entire table displayed below. Challenge is disregarding the 2 columns in the middle.
I am trying the parsed option but it seems the rows and columns are mixed up. I even tried setting the switchRowsAndColumns value to true. (https://api.highcharts.com/highcharts/data.seriesMapping)
You can also use complete function to modify your data.
Example code based on your config:
complete: function(options) {
let series = [];
series.push(options.series[2]);
options.series = series;
}
Demo:
https://jsfiddle.net/BlackLabel/tfs4ubcL/
API Reference:
https://api.highcharts.com/highcharts/data.complete
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
I'm doing a combo scatter and line charts (it's a electoral poll tracker) following this example from HC docs:
series: [{
type: 'scatter',
name: 'Party1',
data: [10.1,9.2,9.8]
}, {
type: 'scatter',
name: 'Party2',
data: [6.5,6.5,6.8]
}, {
type: 'spline',
name: 'Party1-tracker',
data: [10.1,9.8,10.0]
}, {
type: 'spline',
name: 'Party2-tracker',
data: [6.5,6.5,6.6]
}]
On another document, I can make a chart from a Google Spreadsheet. I've followed this Jack Dougherty example: https://jackdougherty.github.io/highcharts-with-google-sheets/bubble.html
data: {
// insert the key from your public Google Sheet
googleSpreadsheetKey: '1fYJOd-2agLPg38qhblS8qoZGWGkKcK-3uTsMpf37Hys',
// insert Google Sheet column headers (x, y, z...) to match column numbers (0, 1, 2...)
seriesMapping: [{x: 0, y: 1, z: 2, name: 3, country: 4, category: 5}],
complete: function(data) {
categoriesIntoSeries(data);
changeSeriesColors(data);
}
},
plus
/**
* Here, all data is split into categories depending on the 'category' property
* Needed for correct legend display
*/
function categoriesIntoSeries(data) {
rows = data.series[0].data;
data.series = [];
for (i = 0; i < rows.length; i++) {
cat = rows[i].category;
catExists = false;
for (j = 0; j < data.series.length; j++) {
if (data.series[j].name == cat) {
// Add a data point to existing series
data.series[j].data.push(rows[i]);
catExists = true;
}
}
if (!catExists) {
// When category is encountered for the first time, create a series
data.series.push({name: cat, data: [rows[i]]})
}
}
}
What I've tried unsuccessfully is (maybe it's impossible) to connect each column from my spreadsheet to each 'series' element. Something like this:
{
type: 'scatter',
name: 'Party1',
data: /*get data from spreadsheet column 1 or a json field*/
}
I'll be thankful if you can tell us if it's possible and, if yes, point me to some documentation or example on how to do this
You can use seriesMapping array for this. It should contain a mapping for every column from the sheet.
Refer to this live demo: http://jsfiddle.net/kkulig/b45s1Luh/
seriesMapping: [{
x: 0,
y: 1 // first column series
}, {
x: 0,
y: 2 // second column series
}, {
x: 0,
y: 3 // third column series
}]
}
API reference: https://api.highcharts.com/highcharts/data.seriesMapping
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.
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