0👍 ✅ Just set the segmentShowStroke option to false, like so new Chart(document.getElementById(“myChart”).getContext(“2d”)).Pie(data, { segmentShowStroke: false }); Charts .js update when array changes
👍:0 From the documentation: .update( ) Calling update() on your Chart instance will re-render the chart with any updated values, allowing you to edit the value of multiple existing points, then render those ione n imatanred eendr loop. myLineChart.datasets[0].points[2].value = 50; // Would update the first dataset’s value of ‘March’ to be 50 myLineChart.update(); // … Read more
👍:0 Your button has type=”submit”. This submits the form when you click it effectively refreshing it. Change it to type=”button” <input type=”button” id=”btnSubmit” value=”Submit” /> The data property for a dataset should be an array. So you can take out the outer loop and directly plug in newArray var ctx = $(“#myChart”).get(0).getContext(“2d”); var data = … Read more
0👍 ✅ But that seems like it’s just setting ONE object called dayChart in the window scope. That’s because you are assigning the chart instance to the same variable each time. What you probably want is To initialize (once) window.piieCharts = []; and then each time you create a chart window.piieCharts.push(new Chart(ctx).Pie(pieData,pieOptions)); and you can … Read more
0👍 ✅ i resolve this by convertion collection to an array : var refC = document.getElementsByName(“ref”); var ref =[]; for(var i = 0; i < refC.length; i++){ ref[i]=document.getElementsByName(“ref”)[i].value;} var entC = document.getElementsByName(“ent”); var ent =[]; for(var i = 0; i < entC.length; i++){ ent[i]=document.getElementsByName(“ent”)[i].value;} Change 'points' on a line chart to donuts using Chart.js
👍:0 Ah, I seem to have overlooked the option in the documentation. For future readers: pointDotStrokeWidth: 1 will set the points. There is also datasetStrokeWidth: 2. Also, strokeColor: ‘#fff’ actually uses Canvas’ strokeStyle method, so you can use gradients and such to style those, if needed. Set an array to be displayed at Chart js
👍:0 This is because in your data you receive null values to display in the chart. Chartjs’s min function is just a wrapper for the Math.min which will treat null as 0. A fix for this can be to override the helper function calculateScaleRange Just declare this after you have Chart.js (or apply the small … Read more
👍:0 You can access the data from the chart elements collection. For example, for a pie chart you could do myPieChart.segments.forEach(function (segment) { console.log(segment.value) }) Likewise each chart type has a collection. Look for the update() method under the Prototype methods section for the chart type in http://www.chartjs.org/docs Chart.js – In Graph Data for Pie … Read more
0👍 ✅ Keeping in mind that only data will be changed because you want the same canvas for everything, you can create a function which draw the data on the canvas everytime is called (See the function receive as first parameter the data that will be displayed in the canvas) function selectData(id){ if(id == 1){ … Read more
👍:0 The easiest way would be to just destroy the chart (using the chart variable) and construct a new chart using the new data. For instance, if you already have constructed it using … var ctx = document.getElementById(“chart”).getContext(“2d”); var myChart = new Chart(ctx).Bar(data); You need to destroy it first using myChart.destroy(); and then make the … Read more