docs: def bootstrap(array):
      """
      Provides a bootstrap resampling of an array. Provides another
      statistical method to estimate the variance of a dataset.
  
      For a `PCA` object in this library, it should be applied to
      `Orientation.array` method.
      """
      reg_func = lambda a: N.linalg.svd(a,full_matrices=False)[2][2]
      beta_boots = bootstrap(array, func=reg_func)
      return yhat, yhat_boots