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Mathematica Import/Export Format

MPS (.mps)

MPS mathematical file format.
De facto standard for specifying linear programming (LP) problems.
Commonly used as input format by LP solvers.
MPS is an acronym for Mathematical Programming System.
Plain text ASCII format, sometimes compressed as binary.
Stores data in a fixed-width tabular form.
Developed in the 1970s at IBM.
  • Import fully supports the MPS format.
  • Import["file.mps"] imports an MPS file, returning an expression representing an optimization problem.
  • Import["file.mps"] returns a list of objective functions and constraints in a form suitable as input for NMinimize.
  • Import["file.mps", elem] imports the specified element from an MPS file.
  • Import["file.mps", {elem, suba, subb, ...}] imports a subelement.
  • Import["file.mps", {{elem1, elem2, ...}}] imports multiple elements.
  • The import format can be specified with Import["file", "MPS"] or Import["file", {"MPS", elem, ...}].
  • See the reference pages for full general information on Import.
"Elements"list of elements and options available in this file
"Rules"full list of rules for each element and option
"Options"list of rules for options, properties and settings
  • Data representation elements:
"Equations"list of objective functions and constraints
"LinearProgrammingData"vectors and matrices representing a linear program
"ConstraintMatrix"matrix describing the constraints of a linear programming problem
  • Import uses the "Equations" element by default.
"FreeFormat"Falsewhether data fields are loosely or strictly aligned in the file
"EMPS"Falsewhether the file is compressed