Tips for setting a uniform width for all bars in apexcharts bar column width

When working with dynamic data, the length of the data should also be variable. For instance, if the data has a length of 24, the column width should be 35px; similarly, even if the data has a length of 2, the column width should still be 35px.

Apexchart uses columnWidth in percentage, making it challenging to specify an exact width for all bars under different conditions, whether there is 1 bar, 5 bars, or 30 bars. While this responsive behavior is useful, I want to establish a fixed width for all bars.

  1. https://i.sstatic.net/LBakh.png
  2. https://i.sstatic.net/c83Ri.png

I would like the columnWidth to be fixed at the size shown in the first image even when there is only 1 piece of data. As seen in the second graph, the columnWidth appears larger than before, so I aim for a consistent width across all bars regardless of the number of data points.

Using: import ApexCharts from "react-apexcharts"; "react-apexcharts": "^1.3.6",

javascripthtmlcssapexcharts

Answer №1

If you're using ApexCharts, unfortunately there isn't a direct way to specify the columnWidth in pixels. One workaround could be setting a percentage width based on the number of categories present. While it may not be completely accurate, it could serve your purpose.

To convert the desired column width in pixels (x) into a percentage based on the chart width (w) and the number of data series (n), you can utilize this simple function:

const getPercentWidth = (w, n, x) => {
  const percentWidth = Math.round((x / (w / n)) * 100)
  return `${percentWidth}%`
}

For more information regarding additional options for column width in the future, you can refer to this issue on their GitHub repository.

Answer №2

I recently discovered a solution to the issue at hand: Dealing with maximum width in Apexcharts item bars

While the linked resource provides a helpful resolution, I have made an enhancement to further improve it.

If you wish for a mathematical function that slows down as the dataset size grows, consider implementing a logarithmic function within the columnWidth property:

plotOptions: {
  bar: {
    columnWidth:
      optimalColumnWidthPercent *
        Math.log(xAxisPointsArray.length + 1) *
        30 +
      "%",
    borderRadius: 2,
  },
}

For customization purposes, feel free to adjust the "30" value within the formula according to your requirements.

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