docs: def lincc(x, y):
      """
  Calculates Lin's concordance correlation coefficient.
  
  Usage:   alincc(x,y)    where x, y are equal-length arrays
  Returns: Lin's CC
  """
      covar = cov(x, y) * (len(x) - 1) / float(len(x))  # correct denom to n
      xvar = var(x) * (len(x) - 1) / float(len(x))  # correct denom to n
      yvar = var(y) * (len(y) - 1) / float(len(y))  # correct denom to n
      lincc = (2 * covar) / ((xvar + yvar) + ((mean(x) - mean(y)) ** 2))
      return lincc