Matplotlib Bar Chart choose color if value is positive vs value is negative

Question

I have a pandas DataFrame with positive and negative values as a bar chart. I want to plot the positive colors \'green\' and the negative values \'red\' (very original...lol

Answer 1

If you want to avoid adding a column, you can do TomAugspurger's solution in one step:

data['values'].plot(kind='barh',
                    color=(data['values'] > 0).map({True: 'g',
                                                    False: 'r'}))