column_lines

Julia

column_lines(entries::Vector{JacEntry}, sv::SysView, axis::String)

column_lines(entries, sv, axis::String) -> Union{NamedTuple, Nothing}

The per-line structure of a state Jacobian whose couplings all stay within one line along index set axis, or nothing when one does not: every band couples two array states of one common shape that holds axis once, and at every band point the column equals the row in every other dimension. A point reading past the axis is a ghost read and does not count. Returns (axis, dim, line_length, block_vars, kl, ku, pattern): kl / ku the largest distances below / above the diagonal any point reaches along the axis, and pattern their name — "dense" (both span the line), "lower", "upper", or "banded" — read off the exact band points, never probed.

Source

Python

column_lines(entries: list[JacEntry], sv: SysView, axis: str) -> dict | None

The per-line structure of a state Jacobian whose couplings all stay within one line along index set axis, or None when one does not (structure.jl column_lines): every band couples two array states of one common shape that holds axis once, and at every band point the column equals the row in every other dimension. A point reading past the axis is a ghost read and does not count. Returns a dict with axis, dim (1-based), line_length, block_vars, kl / ku (the largest distances below / above the diagonal any point reaches along the axis) and pattern — "dense", "lower", "upper" or "banded" — read off the exact band points, never probed.

Source

Rust

pub fn column_lines(entries: &[JacEntry], sv: &SysView<'_>, ctx: &Ctx, axis: &str) -> Result<Option<ColumnLines>, BandError>

The per-line structure of a state Jacobian along index set axis, or None when a coupling leaves its line: every band couples two array states of one common shape that holds axis once, and at every band point the column equals the row in every other dimension. A point reading past the axis is a ghost read and does not count. kl / ku and their pattern name are read off the exact band points (guards applied), never probed.

Source · Rust docs