code: def test_logarithmic_freq_02(self):
      method = "logarithmic"
      f0 = 200.0
      f1 = 100.0
      t1 = 10.0
      t = np.linspace(0, t1, 10000)
      phase = waveforms._chirp_phase(t, f0, t1, f1, method)
      tf, f = compute_frequency(t, phase)
      abserr = np.max(np.abs(f - chirp_geometric(tf, f0, f1, t1)))
      assert_(abserr < 1e-6)
  
imports: from __future__ import division, print_function, absolute_import
  import numpy
  from numpy.testing import assert_almost_equal, assert_equal, assert_, assert_allclose, assert_array_equal
  from pytest import raises
  import scipy.signal.waveforms
label_desc: Use image node_id 10 for calling the TestChirp obj's underlying member method code with example usage: obj.test_logarithmic_freq_02() without return types