Build the LP column index

One row per LP column. Columns are enumerated per variable from the tuples of the mapping named by variable$domain; a variable with no domain is treated as a scalar and contributes a single column.

Usage

build_col_index(model, verbose = FALSE, names = TRUE)

Arguments

model

A multimod model with data attached.

verbose

Logical; report per-variable column counts.

names

Logical; add the readable name column (symbol.i1.i2...). FALSE skips it — on large models the names dominate index-building memory, and the MPS/solution path never reads them.

Value

A data.table with columns j (1-based column index), symbol, name (symbol.i1.i2..., when names = TRUE), i1..iN (index members, NA beyond a symbol's arity), and bounds lo, up, vtype. Per-symbol dimension names are kept in the dim_names attribute (a named list).

Examples

cols <- build_col_index(example_models$toy)
table(cols$symbol)
#> 
#>  vCap vCost  vGen 
#>     6     1     6