Initializing help system before first use

# getprimalray

Purpose
Get a primal ray for an unbounded problem.
Synopsis
`function getprimalray(ray:array(set of mpvar) of real):boolean`
Argument

ray | An array of reals over all constraints in the problem (as loaded) in which the primal ray is returned.

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), " ", primal_ray(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
getdualray
Module
mmxprs
Parent Topic Procedures and functions

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