Write a solution as one table per variable

Writes each solved variable to its own file, with the index columns under their real set names rather than positional i1..iN.

Usage

write_solution(
  solution,
  dir,
  format = c("arrow", "csv", "parquet"),
  variables = NULL,
  nonzero_only = TRUE
)

Arguments

solution

A solution from solve_highs() or read_mps_solution().

dir

Directory to write into; created if absent.

format

One of "arrow", "csv", "parquet".

variables

Optional character vector; write only these variables.

nonzero_only

Drop rows whose value is zero, and skip a variable that is entirely zero. TRUE by default, which is what solvers' readers generally expect.

Value

The paths written, invisibly, with the kept variable names in the "variables" attribute.

Details

This is multimod's own layout and carries no assumptions about who reads it. write_energyrt_output() builds on it, adding the extra files energyRt's read_solution() expects.

See also

write_energyrt_output(), read_mps_solution()

Examples

# \donttest{
# Solving takes a few seconds
if (requireNamespace("highs", quietly = TRUE)) {
  m <- example_models$energyRt$multimod
  r <- solve_highs(m, attach = FALSE)
  write_solution(r, file.path(tempdir(), "energyRt_solution"), format = "csv")
}
# }