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Well, I assume you know HTML/JavaScript/CSS, websockets, etc to use chart.js in your apps.
Here is a related post that might be of help to get you started….
Chart.js number Y-AXIS label format for many decimal places
You just have to get started somewhere, sometime!!!
Good luck.
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Use the addData
method.
From the documentation at http://www.chartjs.org/docs/#advanced-usage-prototype-methods
.addData( valuesArray, label )
Calling addData(valuesArray, label) on your Chart instance passing an
array of values for each dataset, along with a label for those points.// The values array passed into addData should be one for each dataset in the chart myLineChart.addData([40, 60], "August"); // This new data will now animate at the end of the chart.
Source:stackexchange.com