code: def acf_to_acorr(acf):
      diag = np.diag(acf[0])
      # numpy broadcasting sufficient
      return acf / np.sqrt(np.outer(diag, diag))
  
file_path: statsmodels/statsmodels/tsa/vector_ar/util.py
imports: from statsmodels.compat.pandas import frequencies
  from statsmodels.compat.python import asbytes
  from statsmodels.tools.validation import array_like, int_like
  import numpy
  import pandas
  from scipy import stats, linalg
  import statsmodels.tsa.tsatools
label_desc: Use image node_id 7 for calling a global function with example usage: acf_to_acorr(acf) and returns: unknown