How to display just the limited part of data in chart.js?

by hal.littel , in category: Javascript , 2 months ago

How to display just the limited part of data in chart.js?

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1 answer

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by gilbert , 2 months ago

@hal.littel 

To display only a limited part of data in chart.js, you can use the chart.js slice() method in combination with the labels and data arrays of your chart data.


Here is an example:

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// Assuming you have an array of full data
let fullData = [15, 20, 30, 25, 35, 40, 45, 50, 55, 60];

// Define the number of data points you want to display
let displayDataLimit = 5;

// Slice the data array to get the limited data points
let limitedData = fullData.slice(0, displayDataLimit);

// Similarly, if you have corresponding labels for your data points
let fullLabels = ['Label 1', 'Label 2', 'Label 3', 'Label 4', 'Label 5', 'Label 6', 'Label 7', 'Label 8', 'Label 9', 'Label 10'];

// Slice the labels array to get the limited labels
let limitedLabels = fullLabels.slice(0, displayDataLimit);

// Set up your chart configuration and options
let chartConfig = {
  type: 'bar',
  data: {
    labels: limitedLabels,
    datasets: [{
      label: 'Limited Data',
      data: limitedData,
      backgroundColor: 'rgba(0, 123, 255, 0.8)',
    }]
  },
  options: {
    // ... other chart options
  }
};

// Create the chart instance
let myChart = new Chart(ctx, chartConfig);


In the example above, the slice() method is used to extract the first 5 data points from the fullData array and store them in the limitedData array. Similarly, it slices the first 5 labels from the fullLabels array and stores them in limitedLabels. These limited arrays are then used in the chart configuration to display only the limited part of the data in your chart.