An error bar chart is a type of an error chart used to show variations in data from its original value.
In this section you will be shown how you can:
Create a simple error bar chart
Configure properties of error bars
Creating a Simple Error Bar Chart
As an example, we will create an error bar chart that compares the lifespan of systems at the Daly City Serramonte, Bakersfield Central, Garden Groove Harbour stores.
An error bar chart thus created looks like this:
Given below is a brief description of the attributes used to create an error bar chart:
| Attribute | Description |
|---|---|
label |
It is used to specify the label for the data item. The label is rendered on the x-axis. This attribute belongs to the category object, which belongs to the categories object. |
value |
It is used to specify the numeric value for a data item. This value will be plotted on the chart. This attribute belongs to the data object, which belongs to the dataset object. |
errorValue |
It is used to specify the error value that will be plotted as the error bar on the chart. This attribute belongs to the data object, which belongs to the dataset object. |
The data structure for creating the above chart is given below:
Error Bar Configuration
You can customize the cosmetic properties of error bars to change their appearance.
An error bar chart, after customizing the error bars, looks like this:
Given below is a brief description of the attributes used to customize the error bars in an error bar chart:
| Attribute | Description |
|---|---|
halfErrorBar |
It is used to specify whether full error bars will be rendered instead of half error bars. Setting this attribute to 0 will show full error bars, setting it to 1 (default) will render half error bars. |
errorBarColor |
It is used to specify the hex code of the color that will be used to render the error bars. |
errorBarAlpha |
It is used to specify the transparency for the error bars. This attribute takes values between 0 (transparent) and 100 (opaque). |
errorBarThickness |
It is used to specify the thickness of the error bars, in pixels. |
errorBarWidthPercent |
It is used to configure the width of the error bars as a percentage of the column width. |
The data structure for creating the above chart is given below:
There! You have now seen how you can create an error bar chart and customize the error bars.