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106 lines
3.1 KiB
Markdown
106 lines
3.1 KiB
Markdown
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http://www.apache.org/licenses/LICENSE-2.0
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---
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title: Bar Chart
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sidebar_position: 1
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---
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# Bar Chart Component
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The Bar Chart component is used to visualize categorical data with rectangular bars.
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## Props
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| Prop | Type | Default | Description |
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|------|------|---------|-------------|
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| `data` | `array` | `[]` | Array of data objects to visualize |
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| `width` | `number` | `800` | Width of the chart in pixels |
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| `height` | `number` | `600` | Height of the chart in pixels |
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| `xField` | `string` | - | Field name for x-axis values |
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| `yField` | `string` | - | Field name for y-axis values |
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| `colorField` | `string` | - | Field name for color encoding |
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| `colorScheme` | `string` | `'supersetColors'` | Color scheme to use |
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| `showLegend` | `boolean` | `true` | Whether to show the legend |
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| `showGrid` | `boolean` | `true` | Whether to show grid lines |
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| `labelPosition` | `string` | `'top'` | Position of bar labels: 'top', 'middle', 'bottom' |
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## Examples
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### Basic Bar Chart
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```jsx
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import { BarChart } from '@superset-ui/chart-components';
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const data = [
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{ category: 'A', value: 10 },
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{ category: 'B', value: 20 },
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{ category: 'C', value: 15 },
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{ category: 'D', value: 25 },
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];
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function Example() {
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return (
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<BarChart
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data={data}
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width={800}
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height={400}
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xField="category"
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yField="value"
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colorScheme="supersetColors"
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/>
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);
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}
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```
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### Grouped Bar Chart
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```jsx
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import { BarChart } from '@superset-ui/chart-components';
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const data = [
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{ category: 'A', group: 'Group 1', value: 10 },
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{ category: 'A', group: 'Group 2', value: 15 },
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{ category: 'B', group: 'Group 1', value: 20 },
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{ category: 'B', group: 'Group 2', value: 25 },
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{ category: 'C', group: 'Group 1', value: 15 },
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{ category: 'C', group: 'Group 2', value: 10 },
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];
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function Example() {
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return (
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<BarChart
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data={data}
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width={800}
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height={400}
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xField="category"
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yField="value"
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colorField="group"
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colorScheme="supersetColors"
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/>
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);
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}
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```
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## Best Practices
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- Use bar charts when comparing quantities across categories
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- Sort bars by value for better readability, unless there's a natural order to the categories
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- Use consistent colors for the same categories across different charts
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- Consider using horizontal bar charts when category labels are long
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