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cran / optiSolve

:exclamation: This is a read-only mirror of the CRAN R package repository. optiSolve — Linear, Quadratic, and Rational Optimization
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Issue with simple linear program #1

Open kevin-remmy opened 3 years ago

kevin-remmy commented 3 years ago

When I try to duplicate results obtained for a simple linear program using lpSolve or gurobi, I run into issues. In particular, the function solvecop throws a message "Certificate of dual infeasibility found" (the solver employed is cccp). Upon closer investigation, I realized that the issue comes from line 17 in the function simplify.R In this line, the object a is kind of normalized and re-scaled. When I uncomment this line, I recover the same results as when using lpSolve/gurobi. I also recover the results when using the cccp function directly. What is the reason for this normalization/re-scaling in simplify.R?

gaborcsardi commented 3 years ago

This is a read only mirror of CRAN, please see the package authors and potentially URLs in the DESCRIPTION file. Thanks!