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Update nebula-algorithm.md #1263

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6 changes: 4 additions & 2 deletions docs-2.0/nebula-algorithm.md
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## 使用限制

点 ID 的数据必须为整数，即点 ID 可以是 INT 类型，或者是 String 类型但数据本身为整数。
- 点 ID 的数据必须为整数，即点 ID 可以是 INT 类型，或者是 String 类型但数据本身为整数。

对于非整数的 String 类型数据，推荐使用调用算法接口的方式，可以使用 SparkSQL 的`dense_rank`函数进行编码，将 String 类型转换为 Long 类型。
- 对于非整数的 String 类型数据，推荐使用调用算法接口的方式，可以使用 SparkSQL 的`dense_rank`函数进行编码，将 String 类型转换为 Long 类型。

- 图计算会输出点的数据集，算法结果会以DataFrame形式作为点的属性存储。用户可以根据业务需求，自行对算法结果做进一步操作，例如统计、筛选。

## 支持算法

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