> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.nvidia.com/holoscan/sdk-user-guide/llms.txt.
> For full documentation content, see https://docs.nvidia.com/holoscan/sdk-user-guide/llms-full.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.nvidia.com/holoscan/sdk-user-guide/_mcp/server.

# holoscan::Matrix2d

```cpp showLineNumbers={false}
using Matrix2d = Matrix2<double>;
```