Matrix - Regedit ~repack~

HKEY_LOCAL_MACHINE\SOFTWARE\CompanyName\Product\Matrices ├── TransformMatrix │ Type = REG_SZ "binary" │ Data = REG_BINARY ... ├── LookupTable_3x4 │ Type = REG_SZ "json" │ Data = REG_SZ "..." └── UserPrefMatrix rows = REG_DWORD 5 cols = REG_DWORD 5 data_0_0 = REG_DWORD 1 ... | Method | Read Speed | Write Speed | Memory Overhead | Max Practical Size | |--------|------------|-------------|-----------------|--------------------| | Binary | Very fast | Fast | Low | ~1 MB (registry limit) | | JSON | Medium | Medium | Medium | 64 KB (REG_SZ limit) | | Row-per-key | Slow (many lookups) | Slow | High | Hundreds of keys |

1. Introduction The Windows Registry is a hierarchical database used by Microsoft Windows to store low-level settings for the operating system and applications. While typically used for key-value pairs (strings, integers, binary blobs), it can also be leveraged to represent matrix structures (2D arrays) by employing systematic naming conventions, serialization techniques, or multi-key arrangements. matrix regedit

[rows:4 bytes][cols:4 bytes][data: rows×cols × element_size] Introduction The Windows Registry is a hierarchical database

For most matrix applications, (compact, fast) or REG_SZ with JSON (human-readable, flexible) is preferred. 3. Encoding Matrices in the Registry 3.1 Binary Encoding (Fixed-Size Numeric Matrix) Store matrix dimensions (rows, cols) and element values in a single REG_BINARY value. poor for large matrices.

HKEY_CURRENT_USER\Software\MyMatrix row0 (key) col0 = 1 (REG_DWORD) col1 = 2 (REG_DWORD) col2 = 3 (REG_DWORD) row1 col0 = 4 col1 = 5 col2 = 6 This is intuitive but creates many keys; poor for large matrices. 4.1 Using PowerShell (Binary Matrix Example) # Write a 2x3 float matrix to registry $path = "HKCU:\Software\MatrixDemo" New-Item -Path $path -Force | Out-Null $rows = 2 $cols = 3 $data = @(1.0, 2.0, 3.0, 4.0, 5.0, 6.0) $bytes = [System.Collections.ArrayList]::new() $bytes.AddRange([BitConverter]::GetBytes($rows)) $bytes.AddRange([BitConverter]::GetBytes($cols)) foreach ($val in $data) $bytes.AddRange([BitConverter]::GetBytes([float]$val))