code: def testRegression2(self):
      # test found here: http://www.nabble.com/Wrong-results-for-lpc-in-TSA-package-td17273766.html
      impulse = readVector(join(filedir(), "impulse.txt"))
      coeffs = [
          1.000000000000000,
          -1.755371111771445,
          0.902500000000000,
      ]
  
      c, r = LPC(order=2)(impulse)
  
      self.assertAlmostEqualVector(c - array(coeffs), zeros(3), 1e-3)
  
file_path: essentia/test/src/unittests/temporal/test_lpc.py
imports: from essentia_test import *
label_desc: Use image node_id 4 for calling the TestLPC obj's underlying member method code with example usage: obj.testRegression2() without return types