生物信息学 · katucharts.js/bio
序列标识图
type: 'sequencelogo'DNA/蛋白质序列标识——每个位置的堆叠字母按信息含量 / 频率调整大小。
编辑右侧的JSON并按Run（或⌘/Ctrl + Enter）——数据、标题、类别和颜色全部实时更新。
实时
序列标识图
编辑 · JSON
数据格式
{ x: position, custom: { letters: [{ letter, height }] } }
数据结构
传入图表的 JSON——可直接放进你的 series。
data: [
{ x: 0, custom: { letters: [{ letter: 'A', height: 0.9 }] } },
{ x: 1, custom: { letters: [{ letter: 'G', height: 0.7 }, { letter: 'C', height: 0.3 }] } },
{ x: 2, custom: { letters: [{ letter: 'T', height: 0.8 }] } }
]示例
KatuCharts.chart('container', {
series: [{ type: 'sequencelogo', alphabetType: 'DNA',
data: [{ x: 0, custom: { letters: [{ letter:'A', height:0.9 }] } }] }]
});类型特定选项
| 选项 | 描述 |
|---|---|
alphabetType | 'DNA'（A/C/G/T）或'protein'（20个氨基酸）。 |
变体
蛋白质字母表
将 alphabetType 设为 'protein' 以堆叠 20 种氨基酸字形。
KatuCharts.chart('container', {
series: [{
type: 'sequencelogo', alphabetType: 'protein',
data: [{ x: 0, custom: { letters: [{ letter: 'M', height: 0.9 }] } }]
}]
});Common errors
- Why does my 序列标识图 chart render as a line chart?
- The chart type was not registered. KatuCharts logs "KatuCharts: unknown series type "<type>", falling back to line" and draws a line chart rather than throwing. Import the module the type belongs to — for example `import 'katucharts.js/bio';` — before creating the chart.
- Why do I get "Cannot read properties of null (reading 'appendChild')"?
- The container element does not exist when the chart is created. Create the chart after the element is in the DOM: in React that means inside useEffect, not during render.
- Why is the chart rendering with zero height?
- The container has no height. A div with no content collapses to zero. Give it a height in CSS, or pass `chart: { height: 400 }` in the options.
FAQ
- How do I create a 序列标识图 chart in JavaScript?
- Install with `npm install katucharts.js`, import the module with `import 'katucharts.js/bio';`, then call KatuCharts.chart(container, { chart: { type: 'sequencelogo' }, series: [...] }).
- Why does my 序列标识图 chart render as a line chart?
- The chart type was not registered. KatuCharts logs "KatuCharts: unknown series type "<type>", falling back to line" and draws a line chart rather than throwing. Import the module the type belongs to — for example `import 'katucharts.js/bio';` — before creating the chart.
- Why do I get "Cannot read properties of null (reading 'appendChild')"?
- The container element does not exist when the chart is created. Create the chart after the element is in the DOM: in React that means inside useEffect, not during render.
- Why is the chart rendering with zero height?
- The container has no height. A div with no content collapses to zero. Give it a height in CSS, or pass `chart: { height: 400 }` in the options.