class_docstr: Test the JointPlot visualizer with histograms
class_docstr_tok: ["Test","the","JointPlot","visualizer","with","histograms"]
docstr: When self.columns=int image similarity on numpy dataset
docstr_tok: ["When","self.columns=int","image","similarity","on","numpy","dataset"]
code: def test_columns_single_int_index_numpy_hist(self):
      """
      When self.columns=int image similarity on numpy dataset
      """
      oz = JointPlot(columns=1, hist=True)
      assert oz.fit(self.continuous.X, self.continuous.y) is oz
      assert hasattr(oz, "corr_")
  
      oz.finalize()
      # Python 3.6 Travis ImageComparisonFailure: images not close (RMS 0.837)
      self.assert_images_similar(oz, tol=1.0)
  
imports: import sys
  import pytest
  import numpy
  from functools import partial
  from unittest.mock import patch, MagicMock
  from sklearn.datasets import make_classification, make_regression
  from tests.base import IS_WINDOWS_OR_CONDA, VisualTestCase
  from yellowbrick.exceptions import YellowbrickValueError
  from yellowbrick.features.jointplot import *
  from ..fixtures import Dataset
label_desc: Use image node_id 4 for calling the TestJointPlotHistogram obj's underlying member method code with example usage: obj.test_columns_single_int_index_numpy_hist() without return types