Skip to main content

csr_transpose_pattern

rlx_sparse

Function csr_transpose_pattern 

Source 
pub fn csr_transpose_pattern(
    col_idx: &[i32],
    row_ptr: &[i32],
    n_rows: usize,
    n_cols: usize,
) -> (Vec<i32>, Vec<i32>)
Expand description

Compute (col_idx_T, row_ptr_T) — the sparsity pattern of Aᵀ — from A’s pattern. This is the structural step that must happen before SPARSE_TRANSPOSE_VALUES can permute the values per Newton iteration. Result is independent of the values, so downstream callers compute it once and embed as Op::Constant.