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Chart.JS: How to add Data to a specific dataset


Chart.JS: How to add Data to a specific dataset

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Chart.JS: How to add Data to a specific dataset
Tag : javascript , By : boonchew
Date : December 05 2020, 12:22 PM

To fix the issue you can do Currently I use this to add data to my charts: , This works for me (you probably just need to add update):
function addData() {
  myBarChart.data.labels[12] ="2017";
  myBarChart.data.labels[13] ="2018";
  myBarChart.data.datasets[0].data[12] = 500;
  myBarChart.data.datasets[0].data[13] = 600;
  myBarChart.update();
}

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dynamically update Chart.js draw line chart dataset data


Tag : javascript , By : Chandra P Singh
Date : March 29 2020, 07:55 AM
Any of those help Change the part of the dataset that you receive from the ajax response, then call the chart's update() function. This is done with the 2 additional lines at the end of the $.ajax success function.
$.ajax({
        url: '/rest/analytical/home/viewed/line',
        type: 'GET',
        dataType: 'json',
        success: function (data) {
            dataLength = (data + '').length;
            for(var i=0; i<dataLength; i++){
            durationChartData[i] = data.ret[i].all;
            }

            window.myLine.data.datasets[0].data = durationChartData;
            // 1.x compatible answer (comment out line above):
            // for(i=0; i <durationChartData.length; i++) {
            // window.myLine.datasets[0].points[i].value = durationChartData[i];
            // }
            window.myLine.update();                   
        },
        error: function (data) {
            console.log('duration Chart Data: ' + data);
        }
    });

Add data to dynamically created Chart.js dataset


Tag : jquery , By : Raghu
Date : March 29 2020, 07:55 AM
will be helpful for those in need I finally figured it out. It was much easier then I thought and I have no idea why I didn't figure this out sooner..
Simply create seperate arrays within the first $.each loop and set the values..
var trendDataset = [];

$.each(trends.keywords, function(index, keyword) {
  // Create an Array for each data object
  trendData = [];
  trendLabels = [];
    $.each(keyword.data, function(index, data) {
      trendLabels[index] = data.month,
      trendData[index] = data.popularity
    });  
  // Push the array with data to another array
  trendDataset[index].data = trendData;
});

How to delete a specific dataset from Chart.js?


Tag : javascript , By : alexmajy
Date : March 29 2020, 07:55 AM
should help you out If you're removing using data.datasets.pop(ds1) you'll never get the result you're looking for. The dataset property is an array, so let's just focus on arrays and ignore Chart.js.
First issue is that the pop() method of the Arrays type does not take an argument, so providing which element you want to remove is irrelevant. Pop() will always remove the last element from an array.
let removalIndex = data.datasets.indexOf(ds1); //Locate index of ds1
if(removalIndex >= 0) { //make sure this element exists in the array
    data.datasets.splice(removalIndex, 1);
}

Chart.js - PieChart defined background color for specific dataset element


Tag : javascript , By : foxthrot
Date : March 29 2020, 07:55 AM
I wish did fix the issue. You can define array where colors are values and good, bad and normal are keys, see next:
let chartColors = [];
chartColors['good'] = 'green';
chartColors['bad'] = 'red';
chartColors['normal'] = 'yellow';
someColorVar.push(chartColors[key]); 

Is it possible to define data attributes for each dataset value in a Chart.js chart?


Tag : development , By : enginecrew
Date : March 29 2020, 07:55 AM
With these it helps It depends how you structure your data. In my example I made an object that contains all the data.
let dataObject = {
  Gabriel: {
    diapers: 40,
    age: 4
  }, 
  // Same structure here...
  Zelie: {...}, 
  Santiago: {...}, 
  Serafina: {...}, 
  Berenice: {...}, 
  Pia: {...}
}
tooltips: {
  callbacks: {
    label: function(tooltipItem, data){
      return ['Name: '+tooltipItem.label, 'Diapers: '+tooltipItem.value, 'Age: '+dataObject[tooltipItem.label].age]
    }
  }
}
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