code: def _shift_intercept(arr):
      """
      A convenience function to make the SAS covariance matrix
      compatible with statsmodels.rlm covariance
      """
      arr = np.asarray(arr)
      side = int(np.sqrt(len(arr)))
      return np.roll(
          np.roll(arr.reshape(side, side), -1, axis=1), -1, axis=0
      )
  
imports: import numpy
label_desc: Use image node_id 1 for calling a global function with example usage: _shift_intercept(arr) and returns: np