def setUp(self):
        itau_data = get_itau_data_from_file()
        self.header_arquivo = itau_data['header_arquivo']
        self.seg_p = itau_data['seg_p1']
        self.seg_p_str = itau_data['seg_p1_str']
        self.seg_q = itau_data['seg_q1']
        self.seg_q_str = itau_data['seg_q1_str']
def i1beta_psiq(i1, beta, psiq, ax=0):
    """creates a surface plot of psiq vs i1, beta"""
    if ax == 0:
        _create_3d_axis()
        ax = plt.gca()
    azim = 210
    if 0 < np.mean(beta) or -90 > np.mean(beta):
        azim = -60
    _plot_surface(ax, i1, beta, psiq,
                  (u'I1/A', u'Beta/°', u'Psi q/Vs'),
                  azim=azim)