getprimalray
getprimalray |
Purpose
Get a primal ray for an unbounded problem.
Synopsis
function getprimalray(ray:array(set of mpvar) of real):boolean
Argument
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ray
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An array of reals over all constraints in the problem (as loaded) in which the primal ray is returned.
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Return value
This procedure returns the primal ray found for the problem if the problem is found to be primal unbounded (thus dual infeasible) and one is available.
Example
declarations
all_variables : set of mpvar
primal_ray : array(all_variables) of real
end-declarations
if getprobstat <> XPRS_UNB then
writeln("Problem is not unbounded.")
else
HasRay := getprimalray(primal_ray)
if HasRay then
writeln("Primal ray:")
forall (c in all_variables)
writeln(getname(c), " ", primalray(c))
else
writeln("No primal ray was found")
end-if
end-if
Further information
1. The return value of the function is true if a primal ray is available, and false otherwise.
2. The dimension and base set of the
ray argument will be set up by the function.
Related topics
Module