def eval(self, x_values):
if len(x_values) != len(self.phi_continuous):<EOL><INDENT>raise ValueError('<STR_LIT>'<EOL>'<STR_LIT>'.format(len(self.phi_continuous),<EOL>len(x_values)))<EOL><DEDENT>sum_phi = sum([phi(xi) for phi, xi in zip(self.phi_continuous, x_values)])<EOL>return float(self.inverse_theta_continuous(sum_phi))<EOL>
Evaluate the ACE regression at any combination of independent variable values.

Parameters
----------
x_values : iterable
    a float x-value for each independent variable, e.g. (1.5, 2.5)