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I have been looking for this solution but can't seem to find it . Does chart.js support this ?
I have attempted to parse in the data with papaparse, but due to my limited knowledge I can't find a solution.
There is a Chart.js plugin chartjs-plugin-datasource that makes it easy to load data from CSV files.
Let's suppose you have a CSV file as shown below, and it is saved as sample-dataset.csv in the same directory as your HTML file:
,January,February,March,April,May,June,July
Temperature,7,7,10,15,20,23,26
Precipitation,8.1,14.9,41.0,31.4,42.6,57.5,36.0
Include Chart.js and chartjs-plugin-datasource in your page:
<script src="https://cdn.jsdelivr.net/npm/chart.js#2.8.0"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-datasource#0.1.0"></script>
<canvas id="myChart"></canvas>
Then, specify sample-dataset.csv in your script. By default, each row in a CSV file will be mapped to one dataset, and the first column and the first row will be treated as dataset labels and index labels respectively. You can also customize how to parse CSV data using options.
var ctx = document.getElementsById("myChart");
var chart = new Chart(ctx, {
type: 'bar',
data: {
datasets: [{
type: 'line',
yAxisID: 'temperature',
backgroundColor: 'transparent',
borderColor: 'rgb(255, 99, 132)',
pointBackgroundColor: 'rgb(255, 99, 132)',
tension: 0,
fill: false
}, {
yAxisID: 'precipitation',
backgroundColor: 'rgba(54, 162, 235, 0.5)',
borderColor: 'transparent'
}]
},
plugins: [ChartDataSource],
options: {
scales: {
yAxes: [{
id: 'temperature',
gridLines: {
drawOnChartArea: false
}
}, {
id: 'precipitation',
position: 'right',
gridLines: {
drawOnChartArea: false
}
}]
},
plugins: {
datasource: {
url: 'sample-dataset.csv'
}
}
}
});
Here is my solution that works fine for me. I have a CSV file like this:
country,population
China,1415046
India,1354052
United States,326767
Indonesia,266795
Brazil,210868
...
I want to plot a bar chart with my dataset, the y-axis is population and the x-axis is country.
This is the body of my HTML file.
<body>
<canvas id="myChart" width="100" height="100"></canvas>
<script>
// Load the dataset
d3.csv("data.csv").then(makeChart);
// Plot the data with Chart.js
function makeChart(countries) {
var countryLabels = countries.map(function (d) {
return d.country;
});
var populationData = countries.map(function (d) {
return d.population;
});
var chart = new Chart("myChart", {
type: "bar",
data: {
labels: countryLabels,
datasets: [
{
data: populationData
}
]
}
});
}
</script>
</body>
Result:
You can try it with Codesandbox.
I've had need to do something like this from time to time as well. Here's a link on how to create a chart with Chart.js from a CSV file that explains exactly how to create a chart with Chart.js directly from a CSV file.
The use case explains how to convert a CSV file to JSON using the Flex.io web service (Full disclosure: I'm the senior front end developer at Flex.io).
Here's a JsFiddle if you'd like to see the use case in action:
function getRandomColor() {
var letters = '0123456789ABCDEF'.split('');
var color = '#';
for (var i = 0; i < 6; i++) {
color += letters[Math.floor(Math.random() * 16)];
}
return color;
}
$.ajax({
type: 'post',
url: 'https://www.flex.io/api/v1/pipes/flexio-chart-js-csv-to-json/run?stream=0',
beforeSend: function(xhr) {
xhr.setRequestHeader('Authorization', 'Bearer nmgzsqppgwqbvkfhjdjd');
},
data: $('form').serialize(),
dataType: "json",
success: function(content) {
// render the JSON result from from the Flex.io pipe
$("#flexio-result-data").text(JSON.stringify(content, null, 2))
var first_item = _.get(content, '[0]', {})
var column_labels = _.map(_.omit(first_item, ['os']), function(val, key) {
if (key != 'os')
return key
})
// use Lodash to reformat the JSON for use with Chart.js
var datasets = _.map(content, function(item) {
// use the 'os' column as our label
var item_label = _.get(item, 'os', 'Not Found')
// create an array of number values from each item's JSON object
var item_values = _.map(_.omit(item, ['os']), function(val) {
return parseFloat(val)
})
return {
label: item_label,
data: item_values,
backgroundColor: getRandomColor()
}
})
var chart_data = {
labels: column_labels,
datasets: datasets
}
// render the JSON result after mapping the data with Lodash
$("#chart-data").text(JSON.stringify(chart_data, null, 2))
// render the chart using Chart.js
var ctx = document.getElementById("canvas").getContext("2d");
window.my_chart = new Chart(ctx, {
type: 'bar',
data: chart_data,
options: {
responsive: true,
legend: {
position: 'top'
},
title: {
display: true,
text: 'Use Flex.io to Create a Chart With Chart.js Directly From a CSV File'
}
}
});
}
});
Feel free to step through the use case and let me know if you have any issues.
The simple example of importing CSV data into ChartJS
index.html:
<!-- ChartJS plugin datasrouce example
chartjs-plugin-datasource: https://nagix.github.io/chartjs-plugin-datasource/
Samples: https://nagix.github.io/chartjs-plugin-datasource/samples/
Specific example: https://nagix.github.io/chartjs-plugin-datasource/samples/csv-index.html
Data source: https://gist.githubusercontent.com/mikbuch/32862308f4f5cac8141ad3ae49e0920c/raw/b2b256d69a52dd202668fe0343ded98371a35b15/sample-index.csv -->
<head>
<script src="https://cdn.jsdelivr.net/npm/chart.js#2.8.0"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-datasource#0.1.0"></script>
</head>
<body>
<div>
<canvas id="myChart"></canvas>
</div>
<script src="script.js"></script>
</body>
You can also download this index.html file as a gist.
script.js
// ChartJS plugin datasrouce example
// chartjs-plugin-datasource: https://nagix.github.io/chartjs-plugin-datasource/
// Samples: https://nagix.github.io/chartjs-plugin-datasource/samples/
// Specific example: https://nagix.github.io/chartjs-plugin-datasource/samples/csv-index.html
// Data source: https://gist.githubusercontent.com/mikbuch/32862308f4f5cac8141ad3ae49e0920c/raw/b2b256d69a52dd202668fe0343ded98371a35b15/sample-index.csv
var chartColors = {
red: 'rgb(255, 99, 132)',
blue: 'rgb(54, 162, 235)'
};
var color = Chart.helpers.color;
var config = {
type: 'bar',
data: {
datasets: [{
type: 'line',
yAxisID: 'temperature',
backgroundColor: 'transparent',
borderColor: chartColors.red,
pointBackgroundColor: chartColors.red,
tension: 0,
fill: false
}, {
yAxisID: 'precipitation',
backgroundColor: color(chartColors.blue).alpha(0.5).rgbString(),
borderColor: 'transparent'
}]
},
plugins: [ChartDataSource],
options: {
title: {
display: true,
text: 'CSV data source (index) sample'
},
scales: {
xAxes: [{
scaleLabel: {
display: true,
labelString: 'Month'
}
}],
yAxes: [{
id: 'temperature',
gridLines: {
drawOnChartArea: false
},
scaleLabel: {
display: true,
labelString: 'Temperature (°C)'
}
}, {
id: 'precipitation',
position: 'right',
gridLines: {
drawOnChartArea: false
},
scaleLabel: {
display: true,
labelString: 'Precipitation (mm)'
}
}]
},
plugins: {
datasource: {
type: 'csv',
url: 'https://gist.githubusercontent.com/mikbuch/32862308f4f5cac8141ad3ae49e0920c/raw/b2b256d69a52dd202668fe0343ded98371a35b15/sample-index.csv',
delimiter: ',',
rowMapping: 'index',
datasetLabels: true,
indexLabels: true
}
}
}
};
window.onload = function() {
var ctx = document.getElementById('myChart').getContext('2d');
window.myChart = new Chart(ctx, config);
};
Here is a a gist with this script.js file.
Make sure that both files are in the same directory.
Open index.html with your browser.
Additional materials
CodeSandbox example to preview the example online.
Reason for posting this answer:
I posted this because people are having problems with reading CSV files from the filesystem (directly from the computer) with JavaScript. The examples in chartjs-plugin-datasource documentation don't explain this, and it is assumed that the user has some basic knowledge on the differences in handling URLs from the web, and files from the file system.
My example just shows the basic functionality of the ChartJS datasource plugin, no third-party modules for reading the CSV file are required.
Edit:
According to ggorlen's suggestion from the comment, I also included the code snippets in the answer itself.
Can't post comments on this elitist site, because four years hasn't gotten me enough "points." ....
#huy - interesting how your Codesandbox has completely different code than what you've posted which I found was directly ripped off from another site... it doesn't even relate to the chart you were talking about building. Within Codesandbox, all I see is an image file of the chart, nothing is actually working (and how could it, when the code isn't even related to your dataset!?).
I'm trying to load json data from controller Jsonresult in MVC 4 but it doesn't seems to work in HighStock. The data was serialized and the alert it popping up and displaying the data. I don't know why the chart is not rendering. But it is working when i create a variable like var data = [1,2] in the javascript function.
<script type="text/javascript">
$(function () {
$.getJSON('GetData', function (data) {
alert(data);
var data1 = [1, 2];
alert(data1);
// Create the chart
$('#container').highcharts('StockChart', {
rangeSelector: {
selected: 1
},
title: {
text: 'AAPL Stock Price'
},
series: [{
name: 'AAPL',
data: data,
tooltip: {
valueDecimals: 2
}
}]
});
});
});
[HttpGet]
public JsonResult GetData()
{
string sample = "[1,2]";
var jss = new JavaScriptSerializer();
var output = jss.Serialize( sample );
return Json( output, JsonRequestBehavior.AllowGet );
}
I am a complete n00b to Backbone.js, and have only been working with it for a few days. I am attempting to fetch JSON data to populate the model, and in this scenario I have two models that I need to generate. Here is the sample JSON I have been working with:
JSON
{
"status": "200",
"total": "2",
"items":
[{
"id": "1",
"name": "Here is another name",
"label": "Label for test",
"description": "A description for more information.",
"dataAdded": "123456789",
"lastModified": "987654321"
},
{
"id": "2",
"name": "Name of item",
"label": "Test Label",
"description": "This is just a long description.",
"dataAdded": "147258369",
"lastModified": "963852741"
}]
}
Backbone JS
// MODEL
var Service = Backbone.Model.extend({
defaults: {
id: '',
name: '',
label: '',
description: '',
dateAdded: '',
dateModified: ''
}
});
var service = new Service();
// COLLECTION
var ServiceList = Backbone.Collection.extend({
model: Service,
url: "./api/service.php",
parse: function(response) {
return response.items;
}
});
//
var serviceList = new ServiceList();
var jqXHR = serviceList.fetch({
success: function() {
console.log("Working!");
console.log(serviceList.length);
},
error: function() {
console.log("Failed to fetch!");
}
});
// VIEW for each Model
var ServiceView = Backbone.View.extend({
el: $('.widget-content'),
tagName: 'div',
template: _.template($('#service-template').html()),
initialize: function() {
this.collection.bind("reset", this.render, this);
},
render: function() {
console.log(this.collection);
this.$el.html('');
var self = this;
this.collection.each(function(model) {
self.$el.append(self.template(model.toJSON()));
});
return this;
}
});
//
var serviceView = new ServiceView({
collection: serviceList
});
console.log(serviceView.render().el);
html
<div class="widget-content">
<!-- Template -->
<script type="text/template" id="service-template">
<div><%= name %></div>
</script>
</div>
When I console log the serviceList.length I get the value 2, so I believe the JSON object is fetched successfully. I also get the "Working!" response for success too. However, in the view I am showing an empty object, which gives me an empty model.
I am still trying to understand the best way to do this too. Maybe I should be using collections for the "items" and then mapping over the collection for each model data? What am I doing wrong? Any advice or help is greatly appreciated.
I can see two problems. First, you want to remove serviceList.reset(list). Your collection should be populated automatically by the call to fetch. (In any case the return value of fetch is not the data result from the server, it is the "jqXHR" object).
var serviceList = new ServiceList();
var jqXHR = serviceList.fetch({
success: function(collection, response) {
console.log("Working!");
// this is the asynchronous callback, where "serviceList" should have data
console.log(serviceList.length);
console.log("Collection populated: " + JSON.stringify(collection.toJSON()));
},
error: function() {
console.log("Failed to fetch!");
}
});
// here, "serviceList" will not be populated yet
Second, you probably want to pass the serviceList instance into the view as its "collection". As it is, you're passing an empty model instance into the view.
var serviceView = new ServiceView({
collection: serviceList
});
And for the view, render using the collection:
var ServiceView = Backbone.View.extend({
// ...
initialize: function() {
// render when the collection is reset
this.collection.bind("reset", this.render, this);
},
render: function() {
console.log("Collection rendering: " + JSON.stringify(this.collection.toJSON()));
// start by clearing the view
this.$el.html('');
// loop through the collection and render each model
var self = this;
this.collection.each(function(model) {
self.$el.append(self.template(model.toJSON()));
});
return this;
}
});
Here's a Fiddle demo.
The call serviceList.fetch is made asynchronously, so when you try console.log(serviceList.length); the server has not yet send it's response that's why you get the the value 1, try this :
var list = serviceList.fetch({
success: function() {
console.log(serviceList.length);
console.log("Working!");
},
error: function() {
console.log("Failed to fetch!");
}
});
I am using Bootstrap typeahead with an ajax function, and want to know what is the correct Json result format, to return an Id and a descripcion.
I need the Id to bind the typeahead selected element with a mvc3 model.
This is the code:
[Html]
<input id="myTypeahead" class='ajax-typeahead' type="text" data-link="myUrl" data-provide="typeahead" />
[Javascript]
$('#myTypeahead').typeahead({
source: function (query, process) {
return $.ajax({
url: $('#myTypeahead').data('link'),
type: 'post',
data: { query: query },
dataType: 'json',
success: function (jsonResult) {
return typeof jsonResult == 'undefined' ? false : process(jsonResult);
}
});
}
});
This works properly when I return a simple list of strings, for example:
{item1, item2, item3}
But I want to return a list with Id, for example:
{
{Id: 1, value: item1},
{Id: 2, value: item2},
{Id: 3, value: item3}
}
How to process this result in the ajax "success: function()"?
That is very easy with jquery Autocomplete, because I can return a Json Object list.
[jquery Autocomplete process data example]
...
success: function (data) {
response($.map(data, function (item) {
return { label: item.Id, value: item.Value, id: item.Id, data: item };
})
...
But that doesn't work with boostrap Typeahead.
Can anyone help me?
Thanks.
I try for two days and finally I could it working.
Bootstrap Typeahead doesn't support an array of objects as a result by default, only an array of string. Because "matcher", "sorter", "updater" and "highlighter" functions expect strings as parameter.
Instead, "Bootstrap" supports customizable "matcher", "sorter", "updater" and "highlighter" functions. So we can rewrite those functions in Typeahead options.
II used Json format, and bound the Id to a hidden html input.
The code:
$('#myTypeahead').typeahead({
source: function (query, process) {
return $.ajax({
url: $('#myTypeahead').data('link'),
type: 'post',
data: { query: query },
dataType: 'json',
success: function (result) {
var resultList = result.map(function (item) {
var aItem = { id: item.Id, name: item.Name };
return JSON.stringify(aItem);
});
return process(resultList);
}
});
},
matcher: function (obj) {
var item = JSON.parse(obj);
return ~item.name.toLowerCase().indexOf(this.query.toLowerCase())
},
sorter: function (items) {
var beginswith = [], caseSensitive = [], caseInsensitive = [], item;
while (aItem = items.shift()) {
var item = JSON.parse(aItem);
if (!item.name.toLowerCase().indexOf(this.query.toLowerCase())) beginswith.push(JSON.stringify(item));
else if (~item.name.indexOf(this.query)) caseSensitive.push(JSON.stringify(item));
else caseInsensitive.push(JSON.stringify(item));
}
return beginswith.concat(caseSensitive, caseInsensitive)
},
highlighter: function (obj) {
var item = JSON.parse(obj);
var query = this.query.replace(/[\-\[\]{}()*+?.,\\\^$|#\s]/g, '\\$&')
return item.name.replace(new RegExp('(' + query + ')', 'ig'), function ($1, match) {
return '<strong>' + match + '</strong>'
})
},
updater: function (obj) {
var item = JSON.parse(obj);
$('#IdControl').attr('value', item.id);
return item.name;
}
});
Note: I saw #EralpB`s comment "Is this still the best way to accomplish this task?"
Yes, #Gonzalo solution works, but it seems strange (like crutch,especially after using jQuery-Autocomplete) - it should work "from box".Better is to use this - Bootstrap-3-Typeahead. It supports an array of objects as result: format - [{id: .. ,name:...},...,{id: .. ,name:...}]. Example for OP`s issue:
....
source: function (query, process) {
return $.ajax({
......
success: function (result) {
var resultList = [];
$.map(result,function (Id,value) {
var aItem = { id: Id, name: value};
resultList.push(aItem);
});
return process(resultList);
}
});
},
I am trying to use backbones.js fetch to get json from a twitter search
and my code below can someone tell me where I am going wrong?
(function($){
var Item = Backbone.Model.extend();
var List = Backbone.Collection.extend({
model: Item,
url:"http://search.twitter.com/search.json?q=blue%20angels&rpp=5&include_entities=true&result_type=mixed"
});
var ListView = Backbone.View.extend({
el: $('#test'),
events: {
'click button#add': 'getPost'
},
initialize: function(){
_.bindAll(this, 'render', 'getPost');
this.collection = new List();
this.render();
},
render: function(){
var self = this;
$(this.el).append("<button id='add'>get</button>");
},
getPost: function(){
console.log(this.collection.fetch());
}
});
// **listView instance**: Instantiate main app view.
var listView = new ListView();
})(jQuery);
I am just getting started with backbone and I just want to console.log the json
you can see my example here. jsfiddle.net/YnJ9q/2/
There are two issues above:
Firstly, you need to add a success/fail callback to the fetch method in order for you to have the fetched JSON logged to the console.
getPost: function(){
var that = this;
this.collection.fetch(
{
success: function () {
console.log(that.collection.toJSON());
},
error: function() {
console.log('Failed to fetch!');
}
});
}
Another problem is the issue of "same-origin-policy'. You can find out how to resolve that by taking a look at this link.
Update:
I modified your code and included the updated sync method. It now works! Take a look here!
Basically, update your collection to include the parse and sync methods as below:
var List = Backbone.Collection.extend({
model: Item,
url: "http://search.twitter.com/search.json?q=blue%20angels&rpp=5&include_entities=true&result_type=mixed",
parse: function(response) {
return response.results;
},
sync: function(method, model, options) {
var that = this;
var params = _.extend({
type: 'GET',
dataType: 'jsonp',
url: that.url,
processData: false
}, options);
return $.ajax(params);
}
});