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Can I adjust or use a given (JavaScript)chart to create a different/new chart?


Can I adjust or use a given (JavaScript)chart to create a different/new chart?

By : krish
Date : November 17 2020, 11:55 AM
seems to work fine You want to create a chart with live data.
First thing is getting the data.
code :


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how to create triangle chart (Funnel Chart/Pyramid Chart) in php?

how to create triangle chart (Funnel Chart/Pyramid Chart) in php?


By : limaoscar1
Date : March 29 2020, 07:55 AM
wish of those help I have a requirement to create a triangle chart(Funnel Chart/Pyramid Chart) in php like below; , maybe sth like this! it needs some calculations!
code :
#trapezoid {
    border-top: 50px solid red;
    border-left: 25px solid transparent;
    border-right: 25px solid transparent;
    height: 0;
    width: 100px;
    margin-right:auto;
    margin-left:auto;
}#trapezoid2 {
    border-top: 50px solid green;
    border-left: 25px solid transparent;
    border-right: 25px solid transparent;
    height: 0;
    width: 50px;
    margin-right:auto;
    margin-left:auto;
}
#trapezoid3 {
    border-top: 50px solid blue;
    border-left: 25px solid transparent;
    border-right: 25px solid transparent;
    height: 0;
    width: 0px;
    margin-right:auto;
    margin-left:auto;
}


html: 
<div id="trapezoid"></div><div id="trapezoid2"></div><div id="trapezoid3"></div>
Adjust appearance of tooltip in lien chart rendered by Chart.js

Adjust appearance of tooltip in lien chart rendered by Chart.js


By : Muthu
Date : March 29 2020, 07:55 AM
This might help you You can change the configuration for tooltip in options. In tooltip, we have callback object. In which, you set the title to a custom function that returns the title you want to give to the tooltip.
[sample-code]
code :
var chartInstanceHoverModeNearest = new Chart(ctx, {
            type: 'bar',
            data: data,
            options:{
                events:["click"],
                title : {
                    display : true
                },
                scales: {
                    xAxes: [{
                        categorySpacing: 0
                    }]
                },
                tooltips: {
                    enabled: true,
                    callbacks : {
                        title : function(){
                            return "Your Custom Title";
                        },
                        label : function(){
                            return "";
                        }   
                    }
                }
            }
        });
callbacks : {
    afterBody:(),
    afterFooter:(),
    afterLabel:(),
    afterTitle:(),
    beforeBody:(),
    beforeFooter:(),
    beforeLabel:(),
    beforeTitle:(),
    footer:(),
    label:(tooltipItem, data),
    labelColor:(tooltipItem, chartInstance),
    title:(tooltipItems, data)
}
How to create a chart (Like Excel) using Javascript using 64382 lines of JSON data. (No Chart.js or other things like th

How to create a chart (Like Excel) using Javascript using 64382 lines of JSON data. (No Chart.js or other things like th


By : Coaxsist
Date : March 29 2020, 07:55 AM
I wish this helpful for you I modified some of the actual data you want to display to include multiple countries with just a few entries. This way you can see how to prevent duplicate countries using an array to store those already displayed, and how to access the various nodes of the objects in your data array.
Look in particular at the if statement before it makes a new table row. There are definitely other ways to do this, but basically you just want a way to keep track of the countries you already displayed.
code :
var data = [
    {
        "dims": {
            "COUNTRY": "Afghanistan",
            "YEAR": "2016",
            "GHO": "Number of physicians"
        },
        "Comments": "Includes doctors</br> Data Source: Ministry of Public Health and other Ministries",
        "Value": "9842"
    },
    {
        "dims": {
            "COUNTRY": "Afghanistan",
            "YEAR": "2016",
            "GHO": "Number of dentistry personnel"
        },
        "Comments": "Includes Dentists</br> Data Source: Ministry of Public Health and other Ministries",
        "Value": "120"
    },
    {
        "dims": {
            "COUNTRY": "Canada",
            "YEAR": "2016",
            "GHO": "Number of pharmaceutical personnel"
        },
        "Comments": "Includes Pharmacists</br> Data Source: Ministry of Public Health and other Ministries",
        "Value": "1675"
    },
    {
        "dims": {
            "COUNTRY": "Mongolia",
            "YEAR": "2015",
            "GHO": "Number of physicians"
        },
        "Comments": "Includes doctors</br> Data Source: Ministry of Public Health and other Ministries",
        "Value": "9808"
     }
]
              


function buildmyTable() {

  // build a string variable with all the table code and data
  var mytable = "<table border='1'>";
  mytable = mytable + "<th>Country</th><th>Value</th>";

  // loop through data table to add data
  var countries = []
  for (i = 0; i < data.length; i = i + 1) {
    if (!countries.includes(data[i].dims.COUNTRY)){
      mytable = mytable + "<tr>";
      mytable = mytable + "<td>" + data[i].dims.COUNTRY + "</td><td>" + data[i].Value + "</td>";
      mytable = mytable + "</tr>";
      countries.push(data[i].dims.COUNTRY);
    }
  }

  mytable = mytable + "</table>";

  // get the div and substitute mytable data for it
  var placetoprint = document.getElementById("printmytable");
  placetoprint.innerHTML = mytable;

}

buildmyTable()
<div id="printmytable"></div>
Chart.js : how I can adjust Pie chart radius?

Chart.js : how I can adjust Pie chart radius?


By : user3048336
Date : March 29 2020, 07:55 AM
Does that help From the styling section of the pie chart documentation of the chart.js library available here, you will see that there is a weight property. This property is used exactly for making the circles bigger/smaller.
Basically, by playing with the weight of the two data sets you can adjust the sizes of the circles. In the code below, I set the weight of the first dataset to 1 and for the second dataset to 4.
code :
var ctx = $('#open_chart');
var chart = new Chart(ctx, {
  type: 'pie',
  data: {
    datasets: [{
      data: [1, 5],
      backgroundColor: ['red', 'blue'],
      weight: 1
    }],
    labels: ['Minor', 'Other']
  },
  options: {
    responsive: true,
    title: {
      display: true,
      text: 'Title',
      position: 'bottom',
      fontSize: 15,
      fontColor: '#000000'
    },
    events: ['mousemove'], // cursor: pointer on hover
    onHover: function (event, chartElement) {
      event.target.style.cursor = chartElement[0] ? 'pointer' : 'default';
    },
    legend: {
      display: false
    },
  },
});



var newDataset = {
  data: [1, 3],
  backgroundColor: ['red', 'blue'],
  weight: 4
};

var config = {
  type: 'pie',
  data: {
    datasets: [{
      data: [1, 3],
      backgroundColor: ['red', 'blue'],
    }],
    labels: ['Red', 'Blue']
  },
  options: {
    responsive: true
  }
};

chart.data.datasets.push(newDataset);
chart.update();
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>

<div class="chart-container" style="position: relative; height:500px; width:300px">
						<canvas id="open_chart" style="position:absolute;top:150px;" width="200" height="200"></canvas>
</div>
Chart.js:9352 Failed to create chart. Unable to dynamically create charts

Chart.js:9352 Failed to create chart. Unable to dynamically create charts


By : user3507272
Date : March 29 2020, 07:55 AM
it fixes the issue You are trying to get canvases before they are created in the view. Use ngAfterViewInit instead of ngOnInit:
code :
ngAfterViewInit() {
  this.makeDetailCharts(this.semesters);
}
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