def execute(self):

        x = self.x
        y = self.y

        self.f_xy = (x-3.0)**2 + x*y + (y+4.0)**2 - 3.0
        #print x, y, self.f_xy

# End paraboloid.py
f(x,y) = (x-3)^2 + xy + (y+4)^2 - 3
dataset/ETHPy150Open OpenMDAO/OpenMDAO-Framework/examples/openmdao.examples.simple/openmdao/examples/simple/paraboloid.py/Paraboloid.execute