Skip to contents

Compare two LP files and report differences

Source: R/compare.R
compare_lp.Rd

Reads two LP files using glpkAPI, extracts all constraint and variable information into data frames, and performs a deep comparison using the compare package. Constraints and variables are sorted by name before comparison, making the comparison order-independent.

Usage

compare_lp(
  file1,
  file2,
  ignoreOrder = TRUE,
  ignoreNameCase = FALSE,
  verbose = FALSE,
  ...
)

Arguments

file1

Path to first LP file (reference/expected)

file2

Path to second LP file (to compare)

ignoreOrder

Ignore row order in comparison (default TRUE, passed to compare::compare)

ignoreNameCase

Ignore case differences in names (default FALSE, passed to compare::compare)

verbose

Logical; if TRUE, print detailed progress (default: FALSE)

...

Additional arguments passed to compare::compare()

compareMatrix

Logical; if TRUE, compare every non-zero coefficient in the constraint matrix (default FALSE because it can be expensive)

matrixTolerance

Absolute tolerance used when flagging coefficient differences (default 1e-9)

matrixVerbose

Logical; emit progress while extracting matrices

Value

A list with:

identical

Logical, TRUE if models are identical

dimensions

List with nrows, ncols for each model

constraints

List with comparison results for constraints

variables

List with comparison results for variables

constraints1

Constraint data frame for file1 when returnData = TRUE

constraints2

Constraint data frame for file2 when returnData = TRUE

variables1

Variable data frame for file1 when returnData = TRUE

variables2

Variable data frame for file2 when returnData = TRUE

objective

Comparison of objective direction

summary

Text summary of differences

See also

compare_mps

Examples

if (FALSE) { # \dontrun{
result <- compare_lp("original.lp", "reproduced.lp")
if (!result$identical) {
  cat(result$summary, "\n")
  # Examine constraint differences
  print(result$constraints$comparison)
}
} # }