code: def test_polyfit_build(self):
      # Ticket #628
      ref = [
          -1.06123820e-06,
          5.70886914e-04,
          -1.13822012e-01,
          9.95368241e00,
          -3.14526520e02,
      ]
      x = [
          90,
          91,
          92,
          93,
          94,
          95,
          96,
          97,
          98,
          99,
          100,
          101,
          102,
          103,
          104,
          105,
          106,
          107,
          108,
          109,
          110,
          111,
          112,
          113,
          114,
          115,
          116,
          117,
          118,
          119,
          120,
          121,
          122,
          123,
          124,
          125,
          126,
          129,
          130,
          131,
          132,
          133,
          134,
          135,
          136,
          137,
          138,
          139,
          140,
          141,
          146,
          147,
          148,
          149,
          150,
          151,
          152,
          153,
          154,
          155,
          156,
          157,
          158,
          159,
          160,
          161,
          162,
          163,
          164,
          165,
          166,
          167,
          168,
          169,
          170,
          171,
          172,
          173,
          174,
          175,
          176,
      ]
      y = [
          9.0,
          3.0,
          7.0,
          4.0,
          4.0,
          8.0,
          6.0,
          11.0,
          9.0,
          8.0,
          11.0,
          5.0,
          6.0,
          5.0,
          9.0,
          8.0,
          6.0,
          10.0,
          6.0,
          10.0,
          7.0,
          6.0,
          6.0,
          6.0,
          13.0,
          4.0,
          9.0,
          11.0,
          4.0,
          5.0,
          8.0,
          5.0,
          7.0,
          7.0,
          6.0,
          12.0,
          7.0,
          7.0,
          9.0,
          4.0,
          12.0,
          6.0,
          6.0,
          4.0,
          3.0,
          9.0,
          8.0,
          8.0,
          6.0,
          7.0,
          9.0,
          10.0,
          6.0,
          8.0,
          4.0,
          7.0,
          7.0,
          10.0,
          8.0,
          8.0,
          6.0,
          3.0,
          8.0,
          4.0,
          5.0,
          7.0,
          8.0,
          6.0,
          6.0,
          4.0,
          12.0,
          9.0,
          8.0,
          8.0,
          8.0,
          6.0,
          7.0,
          4.0,
          4.0,
          5.0,
          7.0,
      ]
      tested = np.polyfit(x, y, 4)
      assert_array_almost_equal(ref, tested)
  
imports: import os
  import numpy
  from numpy.testing import assert_, assert_equal, assert_array_equal, assert_array_almost_equal, assert_raises, _assert_valid_refcount
label_desc: Use image node_id 13 for calling the TestRegression obj's underlying member method code with example usage: obj.test_polyfit_build() without return types