Why am I not seeing any red colors for the negative values here?
df = pd.DataFrame([1, -2, 3, -4])
df['positive'] = df[[0]]>0
df[[0]].plot(kind='bar', color=df.positive.map({True: 'g', False: 'r'}))
I am expecting negative values to be red!
As per our discussion below, this is a bug in the latest version of pandas 0.20.2.