title: AttributeError: 'Series' object has no attribute 'applymap' while applying logTransformation
body: <p>Log Transformation of column containing values like &lt;0, &gt;0 using Python is giving error.
  Is this the correct way..?
  df[&quot;A3&quot;].applymap(lambda x: np.log(x+1) if x&gt;0 else -np.log(-x+1) ).hist()
  plt.show()</p>