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problem.getqobj

problem.getqobj

Purpose
Returns a single quadratic objective function coefficient corresponding to the variable pair (icol, jcol) of the Hessian matrix.
Synopsis
objqcoef = problem.getqobj(icol, jcol)
Arguments
icol 
Column index for the first variable in the quadratic term.
jcol 
Column index for the second variable in the quadratic term.
Example
The following returns the coefficient of the x 0 2 term in the objective function, placing it in the variable value : 
print("diagonal coeff of the Hessian:",
  [p.getqobj(i,i) for i in range(p.attributes.cols)])
Further information
For example, if the objective function has the term [3x 1x 2 + 3x 2x 1]/2 the value retrieved by getqobj is 3.0 and if the objective function has the term [6x 1 2]/2 the value retrieved by getqobj is 6.0.
Related topics
problem.getmqobj, problem.chgqobj, problem.chgmqobj.

Parent Topic Reference Manual

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