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XPRBloadbasis

Purpose

Load a previously saved basis.

Synopsis

int XPRBloadbasis(XPRBbasis basis);  

Argument

basis  

Reference to a previously saved basis.

Return value

0 if function executed successfully, 1 otherwise.

Example

The following code saves the current basis prior to some matrix changes, before subsequently reloading the saved basis to solve the linear relaxation.

XPRBprob expl2;
XPRBbasis basis;
   ...
expl2 = XPRBnewprob("example2");
XPRBsolve(expl2, "l");
basis = XPRBsavebasis(expl2);
   ...
XPRBloadmat(expl2);
XPRBloadbasis(basis); 
XPRBdelbasis(basis);
XPRBsolve(expl2, "l");

Further information

This function loads a basis for the current problem. The basis must have been saved using function XPRBsavebasis. It is not possible to load a basis saved for any other problem than the current one, even if the problems are similar. This function takes into account that the problem may have been modified (addition/deletion of variables and constraints) since the basis has been stored. For reading a basis from a file, the Optimizer library function XPRSreadbasis may be used. Note that the problem has to be loaded explicitly (function XPRBloadmat) before the basis is re-input with XPRBloadbasis. Furthermore, if the reference to a basis is not used any more it should be deleted using function XPRBdelbasis.