Scanning Operations

Scanning operations systematically tile a sliding window across a sequence, applying a transformation at each position. Every scan produces one output state per window position (or per explicit position list), making them ideal for saturation-style screens. Multiscan variants place multiple non-overlapping windows simultaneously.

All scans share a common interface:

• pool — the input sequence (or Pool)

• positions — optional list of window start positions (default: all valid)

• region — restrict the scan to a tagged region

• mode — 'sequential' (left-to-right) or 'random' (shuffled)

Single-window scans

replacement_scan	Replace a sliding window at each position with sequences drawn from an insertion pool.
deletion_scan	Systematically delete a fixed-length window at each position.
insertion_scan	Insert sequences from a pool at each position along the sequence.
shuffle_scan	Shuffle bases within a sliding window at each position.
mutagenize_scan	Apply random point mutations within a sliding window tiling across the sequence.
subseq_scan	Extract the subsequence at each sliding-window position.

Multi-window scans

replacement_multiscan	Place multiple non-overlapping replacement windows simultaneously.
deletion_multiscan	Apply multiple simultaneous deletion windows.
insertion_multiscan	Insert sequences at multiple positions simultaneously.