code: def test_pandas(self, close_figures):
      pc = PCA(pd.DataFrame(self.x))
      pc1 = PCA(self.x)
      assert_allclose(pc.factors.values, pc1.factors)
      fig = pc.plot_scree()
      fig = pc.plot_scree(ncomp=10)
      fig = pc.plot_scree(log_scale=False)
      fig = pc.plot_rsquare()
      fig = pc.plot_rsquare(ncomp=5)
      proj = pc.project(2)
      PCA(pd.DataFrame(self.x), ncomp=4, gls=True)
      PCA(pd.DataFrame(self.x), ncomp=4, standardize=False)
  
imports: from statsmodels.compat.platform import PLATFORM_WIN32
  import warnings
  import numpy
  import pandas
  import pytest
  from numpy.testing import assert_allclose, assert_equal, assert_raises
  from statsmodels.multivariate.pca import PCA, pca
  from statsmodels.multivariate.tests.results.datamlw import data, princomp1, princomp2
  from statsmodels.tools.sm_exceptions import EstimationWarning
label_desc: Use image node_id 7 for calling the TestPCA obj's underlying member method code with example usage: obj.test_pandas(close_figures) without return types