How to provide empty values for chart.js data?

by tressie.damore , in category: Javascript , 21 days ago

How to provide empty values for chart.js data?

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1 answer

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by deron , 20 days ago

@tressie.damore 

To provide empty values for data in chart.js, you can use null or NaN values. Here's how you can use these values according to different chart types in chart.js:

  1. Line Chart: For a line chart, you can use null to represent an empty value. Here's an example: const data = { labels: ['A', 'B', 'C', 'D', 'E'], datasets: [{ label: 'Data', data: [10, null, 5, null, 8], // using null for empty values borderColor: 'blue', fill: false }] }; //...
  2. Bar Chart: For a bar chart, you can also use null to represent an empty value. Here's an example: const data = { labels: ['A', 'B', 'C', 'D', 'E'], datasets: [{ label: 'Data', data: [10, null, 5, null, 8], // using null for empty values backgroundColor: 'blue' }] }; //...
  3. Pie Chart: For a pie chart, you can use NaN to represent an empty value. Here's an example: const data = { labels: ['A', 'B', 'C', 'D', 'E'], datasets: [{ data: [10, NaN, 5, NaN, 8], // using NaN for empty values backgroundColor: ['red', 'blue', 'green', 'yellow', 'orange'] }] }; //...


By using null or NaN values in the data arrays, the corresponding values will be treated as empty, and chart.js will render the chart accordingly.